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MANUAL ON SPECIAL ENERGY METER,

DATA PROCESSING &

COMPUTATION

NORTH EASTERN REGIONAL LOAD DESPATCH CENTRE POWERGRID CORPORATION OF INDIA LIMITED

SHILLONG

MANUAL ON SPECIAL ENERGY METER,

DATA PROCESSING &

COMPUTATION

JAN 2017 Commercial & Operation Services Department

NORTH EASTERN REGIONAL LOAD DESPATCH CENTRE POWERGRID CORPORATION OF INDIA LIMITED

SHILLONG

CONTENTS Page No. Foreword …...…………………………………………………………………….. 1 Section-1: Special Energy Meter & Data Collecting Device

1.1 Special Energy Meter (SEM) ………………………………………… 3 1.2 Data Collecting Device (DCD) ………………………………………. 6 Section-2: Regulatory Requirements of Meters & SEMs in NER

2.1 Metering Philosophy of CEA …………………………………………. 7 2.2 Regulatory Requirements of SEMs …………………………...……….. 8 2.3 Philosophy for Installation of SEMs in NER ………………….….…… 9 2.4 Utility wise Meters in NER …………………………………………… 9 2.5 Constituent wise Metering Arrangement ……….…………….……….. 10 2.6 Master Database of SEMs in NER ……………………………………. 22 Section-3: Meter Data Collection & Transmittal to RLDC

3.1 Data Collection from Meters ………………………………………….. 26 The RS-485 Scheme ..………………………………………………...... 33

3.2 Data Collection Locations in NER ……………………………………. 36 3.3 Automating Meter Data Collection/Transmission …..…………………. 37

Section-4: Data Processing & Computation

4.1 Receipt of SEM Data at RLDC ………………………….…………….. 38 4.2 Softwares for Data Viewing / Conversion to TEXT File ……………… 38 4.3 Appending Text Files ………………………………………………….. 55 4.4 Processing of SEM Data/Computation of Net Injection & Drawal …… 58 4.5 Finally Implemented Schedule ……….………………………….……... 67

4.6 Sending Data to RPC ……………………………………………….…... 69 4.7 UI Computation ……………………………………………….………... 71 4.8 Post Processing & Data Archival …………………………………….... 76 Annexures

Annexure-1: Write-up on RS-485, RS-232 Standards ……………………. 79 Annexure-2: VINCOM software for L&T meters – Deficiencies ………… 85

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Foreword

Special Energy Meter (SEM) with Data Collection device (DCD) was conceptualized and designed by POWERGRID in the beginning of 1990s to take care of metering requirements of bulk power tariff structure (post rationalization) in India in line with ECC recommendations which paved way for ABT (Availability Based Tariff) implementation in India. SEM/DCD was, therefore a special metering package, aimed at fulfilling metering needs of ABT era. North Eastern Region has the distinction of being the first region in the country to get SEMs installed during 1994-95, followed by Southern and Eastern Regions in the same year. As per IEGC provisions, CTU (POWERGRID) is responsible for installation as well as maintenance/testing of SEMs in ISTS. RLDCs validate and process the meter readings received from various locations for computation of REA. In case of any discrepancy/problem related to meter/accessories, RLDCs take up with respective RTS for rectification. In nutshell, metering activities are very streamlined and carried out in a specific time frame; (a) Meter/DCD Commissioning, Maintenance, Testing – CTU/RTS of

POWERGRID (b) Weekly Data Collection/Transmittal to RLDC – Metering Locations (CTU,

State, ISGS) (c) Data Processing, Validation, Computation, Accounting, Metering

Philosophy, Identification of Metering Locations – RLDC A metering manual cannot be complete unless all the above three activities are fully documented. A maiden attempt has been made by NERLDC to bring out a comprehensive manual on “Special Energy Meter, Data Processing & Computation” by compiling all the relevant aspects of metering. The manual unfolds with detailed description of SEM/DCD in Section-1 followed by the regulatory requirements with details of meter location in the region in Section-2. Section-3 covers in great length, data collection from meters and transmittal to RLDC with special emphasis on future road map to automate the system. Finally, data checking, data validation, computation and data archival, which are exclusive functions of RLDC, have been detailed in Section-4. Quite a large number of pictures and screen-shots have been used to enable any person, even not conversant with the subject, to also understand the entire chain of activity with effortless ease. Other meter related activities like maintenance, troubleshooting, time synchronization and testing etc have not been included to restrict the volume of the present manual. Section-4 on “Data Processing and Computation” would undergo revision/modification once we switch over from the existing DOS based software to ORACLE based common software (developed by WRLDC).

1

Foreword

Special Energy Meter (SEM) with Data Collection device (DCD) is conceptualized and designed to take care of metering requirements of bulk power tariff structure (post rationalization) in India in line with ECC recommendations which paved way for ABT (Availability Based Tariff) implementation in India. SEM/DCD was, therefore a special metering package, aimed at fulfilling metering needs of ABT era. As per IEGC provisions, CTU (POWERGRID) is responsible for installation as well as maintenance/testing of SEMs in ISTS. RLDCs validate and process the meter readings received from various locations for computation of REA. In case of any discrepancy/problem related to meter/accessories, RLDCs take up with respective RTS for rectification. In nutshell, metering activities are very streamlined and carried out in a specific time frame; (a) Meter/DCD Commissioning, Maintenance, Testing – CTU/RTS of POWERGRID (b) Weekly Data Collection/Transmittal to RLDC – Metering Locations (CTU, State,

ISGS) (c) Data Processing, Validation, Computation, Accounting, Metering Philosophy,

Identification of Metering Locations – RLDC This manual unfolds with detailed description of SEM/DCD in Section-1 followed by the regulatory requirements with details of meter location in the region in Section-2. Section-3 covers in great length, data collection from meters and transmittal to RLDC. Finally, data checking, data validation, computation and data archival, which are exclusive functions of RLDC, have been detailed in Section-4. Section-4 on “Data Processing and Computation” would undergo revision/modification once we switch over from the existing DOS based software to WEB BASED MDP common software (developed by PWC).

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1.1 Special Energy Meter (SEM)

1.1.1 SEM Concept

SEM is an Application specific Microprocessor base solid state energy meter. This together with a data collecting device (DCD) and a local Computer forms a powerful system of metering and data logging. This type of metering and data logging gives a unique method for measurement of all relevant electrical quantities. Taking help of the support software on a PC enables the user to process metered data and the data can also be viewed in a tabular format.

1.1.2 General Description of SEM

• Static • Accuracy class of 0.2S as per IEC 62053 standard • Working voltage of 63.5V • Secondary current rating of 1A (A-type) and 5A(B-type)

LCD Display

Optical Port

Scroll Buttons

R Phase PT Lead

Y Phase PT Lead

B Phase PT Lead

Neutral Lead

RS-485 TB

B Phase CT Lead

R Phase CT Lead Y Phase

CT Lead

3

• Working range (-5 to 60 C) • Real time clock (RTC) accuracy 30 sec/month • Extended temperature LCD for display • Rechargeable Ni-Cd battery with a push button on front panel to operate during

power failure • Off line data collection possible for 6-7 hrs during power off condition • Surface mounted, light in weight (<2.5kg) • Mounting can be done on a flat surface, one hole on top and two holes at the bottom

1.1.3 Data Recording Format

Data recorded by the meters are normally not Windows readable. Therefore, data downloaded from the meters have to be first converted to Windows readable form, usually a text file, for computation and analysis. This is explained in detail in Section- 4. Conversion software is required for this purpose which is proprietary to the meter supplier. All data of last 10 full days’ plus the most recent complete 15 min block data up to the time of collection is available. Last ten (10) full day’s data remains in non-volatile memory of meter and is available on collection of data.

1.1.4 Measurement Principle

a) Wh Measurement

The active energy (Wh) measurements are carried out on 3-phase, 4-wire principle with an accuracy as per class 0.2S of IEC-687/IEC-62053-22. The meter computes the net active energy (Wh) in each successive 15-minutes block and stores it in its non-volatile memory along with plus/ minus sign. The 15-minute Wh shall have a +ve sign when there is a net Wh export and a –ve sign when there is a net Wh import. Cumulative Wh reading at each midnight shall be stored in the meters memory along with plus/ minus sign. The meter shall store all data in its memories for a period of ten (10) days. The data older than ten (10) days shall get erased automatically.

b) VARh Measurement

The meter shall also compute the reactive power (VAR) on a 3-phase 4-wire principle with an accuracy as per class 0.2S of IEC-687/IEC-62053-23. There shall be two reactive energy registers, one for the period when average RMS voltage is above 103% and the other for the period the voltage is below 97%. The registers will move forward when there is VARh export and will move backward when there is VARh import.

c) Average Frequency

The meter shall count the number of cycles in VT output during each successive

15-minute block and divide the same by 900 (15*60=900) to arrive at the average frequency. The average frequency is stored in meter’s memory in 2-digit code neglecting decimals. In case the average frequency is less than 49.0Hz, it is recorded as 00 and in case it is 51.0Hz or higher it is recorded as 99. The actual frequency corresponding to two consecutive codes differ by 0.01Hz.

1.1.5 Operating Section of the Meter

4

a) Analog Section: High precision Current transformer and voltage transformer step down input currents and voltages which are fed to an Analog to Digital converter.

b) Digital Section: A powerful microprocessor controls the Analog and Digital sections.

Analog to Digital converters are fed from high precision instrument transformers. The Digital samples from Analog to Digital converter are used to process the metering data. The sampling rate is 3000 samples per second which gives the meter an exceptional accuracy and results.

c) Power supply Section: A switch mode power supply (SMPs) unit supplies power to

the meter’s internal circuit.

1.1.6 Display Parameters Special Energy Meters have the facility to display the following parameters: Display Parameter: Indication Display format 1. Meter identification code A NP1234A 2. Date (day, date, month, year) d dd-mm-yy 3. Time (hour, min, sec) t hh:mm:ss 4. Cumulative Wh reading c xxxx.x Wh 5. Reactive Power Pr xxx:x VAr 6. Average freq. of previous block F xx:xx 7. Net Wh transmittal-previous block E xx:xx 8. Average % voltage U xx:xx 9. Voltage high VArh register reading H xxxx:x VArh 10. Voltage low VArh register reading L xxxx:x VArh 11. Real time indication rtC Fit 12. Low battery indication Low Bat

1.1.7 Meter parts and overall dimension of the meter

1.2 Data Collecting Device (DCD)

CUTOUT

154 mm

150 mm

6 mm

25 mm

15 mm

262 mm

Mounting Holes

187+/- 2 mm

325+/- 2 mm77 mm

5

a) DCD is a small hand held terminal having 2MB FLASH RAM memory, capable of communicating with SEM as well as Computer. Both communications require suitable software to be present at either end. DCD is normally battery operated (9-volt), comprising of a key-pad, LCD display and a communication slot. It is used for tapping data stored in a meter’s memory and transferring it to a Computer. Each DCD is supplied with two sets of communication cables.

i) Data Cable: RJ-11 (telephone jack) or round 9-pin male connector (D-cable) at

one end for connecting with DCD and 9-pin female connector at other end for connecting either with optical cable or PC.

ii) Optical Cable: A cable with optical head at one end for coupling with SEM

optical port and 9-pin male connector at other end for connection with data cable.

2.1 Metering Philosopy of CEA (vide notification dated 17.03.06)

2.1.1 Types of Meters

LCD Display

9-Pin Connector

Power ON / OFF

Status LEDs

RJ-11 Port

45 key membrane

keypad

Battery Charging Socket

Data Cable D-Cable

6

a) Interface Meter: Interface Meter means a Meter, connected at the point of interconnection with inter-State Transmission system (ISTS) for the purpose of electricity accounting and billing. Meter shall be owned by CTU.

b) Consumer meter: Consumer Meter means a Meter used for accounting and billing of electricity supplied to the consumer. Meter shall be owned by licensee.

c) Energy accounting meter: Energy Accounting and Audit Meter means Meter used for accounting of electricity to various segments of electrical system. Meter shall be owned by Generating Company or licensee

All interface meters, consumer meters and energy accounting and audit meter shall be of static type.

Note : Our focus is on SEMs which are interface meters. 2.1.2 Meter Standards

All interface meter, consumer meters, energy accounting and audit meters shall:

Comply with the relevant standards of Bureau of Indian Standards (BIS). If BIS Standards are not available for a particular equipment or material, the relevant British Standards (BS), International Electro-technical Commission (IEC) Standards, or any other equivalent Standards shall be followed.

Provided that whenever an International Standard or IEC Standard is followed,

necessary corrections of modifications shall be made for nominal system frequency, nominal system voltage, ambient temperature, humidity and other conditions prevailing in India before actual adaption of the said Standard.

2.1.3 Accuracy Class of Meters

Every meter shall meet the following requirements of accuracy class as specified in the standards.

Interface Meter ……………………………………. 0.2S Consumer meters

Upto 650 Volts ………………………….…. 1.0S Above 650 Volts & upto 33kV ……………. 0.5S Above 33kV ……………………………….. 0.2S Energy accounting and audit meters …………….... 0.2S Accuracy of meters in Generation and Transmission system will be of 0.2S class. 2.1.4 Testing of Meters

Meters shall be tested at site at least once in five years or whenever the accuracy

is suspected or the readings are inconsistent with the readings of the other meters. The testing must be carried out through National Accreditation Board for Testing and Calibration Laboratories (NABL) or any accredited test laboratory and recalibrated if

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required at manufacture’s works. The test must be carried out without removing the CTs and VTs connection

2.1.5 Location of Meters

Location Main Meter Check Meter Standby Meter

Generating Station

On all outgoing feeders

On all outgoing feeders

HV side of GT HV side of Station Aux. Transformers

Transmission System

At one end of the line between the S/Ss of the

same licensee and at the both ends of the line between S/Ss of

two different licensees. Meters at both ends

shall be considered as main meter.

----

There shall be no separate standby

meter. Meter installed at other ends of the

lines in case two different licensees

shall work as standby meter.

ICT HV side of ICT ----- LV side of ICT 2.3 Philosophy for Installation of SEMs in NER

(A) Main meters

a) On all outgoing EHV feeders emanating from an ISGS b) On all identified inlet points of a state connected by EHV feeders.

(B) Back up meters

a) On EHV side of all GTs and STs at an ISGS. b) On one side of each CTU line connected between two CTU S/Ss c) On one side of each ICT connected between two EHV buses in CTU S/Ss. d) At CTU end of all EHV lines connected to State inlet points.

Philosophy adopted in NER before issue of CEA Metering Regulation, however, fulfils CEA metering philosophy. 2.4 Utility wise Meters in NER Sl. No.

Utilities No. of Locations

Secure Make Elster Make

L&T Make

Total

A-Type B-Type 1 AGBPP (NEEPCO) 1 - - - 16 16 2 AGTPP (NEEPCO) 1 - - - 12 12

8

3 DOYANG (NEEPCO) 1 1 - - 8 9 4 KHANDONG (NEEPCO) 1 - - - 11 11 5 KOPILI (NEEPCO) 1 - - - 10 10 6 KOPILI-II (NEEPCO) 1 - - - 2 2 7 RANGANADI (NEEPCO) 1 - - - 12 12 8 LOKTAK (NHPC) 1 - - 8 8 9 PALATANA

(OTPCL) 1 - - 4 11 15

10 NTPC BTPS 1 - - 2 8 10 11 Arunachal Pradesh 2 1 - 2 3 12 Assam 20 4 1 3 32 40 13 Manipur 5 - - 4 7 11 14 Meghalaya 5 - - 12 12 15 Mizoram 1 - - 7 7 16 Nagaland 3 1 - 2 7 10 17 Tripura 9 - 1 - 19 20 18 POWERGRID 20 - 65 101 166 TOTAL 75 7 2 80 285 374

2.5 Contituent wise Metering Arrangement The metering arrangements for the constituents of NER are shown below:

AR. PRADESH interconnection with Grid

Ranganadi Pare

RN-12

9

Bokajan

AR-06

LEGEND

Following main and back up meters are used for calculating Ar. Pradesh state drawal.

Location ID of AP SEM is denoted as AR-XX (where XX is ID no. of meters).

MAIN METERS BACK UP METERS LOC ID Feeder Name LOC ID

AR-01 Nirjuli Transformer Incomer-I * AR-02 Nirjuli Transformer Incomer-II * AR-05 132 kV Naharlagun Feeder (AR-03)+(RN-01) AR-06 132 kV Ziro Ranganadi Feeder RN-11 KT-14 132 kV Deomali- Kathalguri AR-07 AS-55 132 kV Balipara Khupi # AS-49 33 kV Lekhapani Jairampur ** RN-12 132 kV Ranganadi Pare-2 $ * Using net bus of Nirjuli(PG) substation, # Using net bus of Balipara 220 kV bus. ** No back up for SEMs at 33 KV feeders, average reading of previous period taken in case of non-availability of meter reading. $ No back up for SEM at Ranganadi Pare feeder.

AR. PRADESH

A

S

S

A

M

Lekhapani

AS-49 Jairampur

Ranganadi Nahrlgn

RN-01

AR-05

Nirjuli TRF-I

AR-01

Back Up Meter Main Meter

220KV State 132KV State

132KV Line 33KV Line

Deomali

AR-07 KT-14

Nirjuli TRF-II

AR-02

Balipara Khupi

AS-55 Ranganadi Ziro

RN-11 AR-06

Nirjuli Nahrlgn

AR-03 AR-05

10

Fictitious meters are physically non-existent and are introduced for convenience of comput=ation. For Net Drawal of Ar. Pradesh, one fictitious meter AR-51 is used.

(AR-51) = +(AR-01)+(AR-02)-(AR-06)+(KT-14)+(AS-55)+(AS-48)+(AS-49) +(RN-12)+(AR-

03)+(RN- In fictitious meter, ( - ) is used if SEM is installed at inlet/injection point end. ( + ) is used if SEM is installed at the other end.

Assam interconnection with Grid

11

12

LEGEND Following main and back up meters are used for calculating Assam state drawal. Location ID of Assam meters is denoted as AS-XX (where XX is ID no. of meters). MAIN METER LOC ID

FEEDER NAME BACK UP METER LOC ID

AS-01 132 kV KAHELIPARA - UMTRU - 1 ME-03 AS-02 132 kV KAHELIPARA - UMTRU - 2 ME-04 AS-03 220 kV MARIANI - KATHALGURI KT-01

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AS-04 220 kV MARIANI - MISA AS-37 AS-06 132kV PANCHGRAM - LUMSHNONG ME-01 AS-07 132 kV PANCHGRAM - BDP (PG) AS-22 AS-08 132 kV D' CHERRA - D'NGAR TR-06 AS-09 132 kV S' SUJAI - UMTRU -1 ME-07 AS-11 132 kV HAFLONG CONSUMPTION * AS-12 66 kV BOKAJAN - DIMAPUR(S) NG-03 AS-13 132 kV GOHPUR - NIRJULI AR-04 AS-17 220 kV SAMAGURI - MISA -1 AS-38 AS-18 220 kV SAMAGURI - MISA -2 AS-39 AS-19 220 kV SAMAGURI - BALIPARA -1 AS-42 AS-20 220 kV SAMAGURI - BALIPARA -2 AS-43 AS-30 220 kV SALAKATI - BTPS - 1 AS-15 AS-31 220 kV SALAKATI - BTPS - 2 AS-16 AS-46 33 kV GORGAON - NAGINIMORA * AS-47 33 kV MARIANI - CHANKI * AS-49 33kV LEKHAPANI - JAIRAMPUR * AS-50 132 kV S' SUJAI - UMTRU - 2 ME-05 AS-56 132 kV BALIPARA - DEPOTA * AS-57 132 kV BALIPARA - GOPHUR AS-59 AS-73 132 kV RANGIA - MOTONGA(DEOTH) ER-08 AS-77 132kV SRIKONA - SILCHAR -1 AS-75 AS-78 132 kV SRIKONA - SILCHAR -2 AS-76 AS-79 132 kV PANCHGRAM - SILCHAR AS-82 AS-80 132 kV DULLAVCHERA - SILCHAR AS-81 AS-86 132 kV AGIA - N'BIBRA ME-16 AS-93 400 kV AZARA - SILCHAR AS-89 KT-15 22O kV KATHALGURI - TINSUKIA -1 AS-53 KT-16 22O kV KATHALGURI - TINSUKIA -2 AS-74 MN-06 132 kV JIRIBAM - PAILAPOOL AS-10 NG-08 132 kV DIMAPUR - BOKAJAN AS-63 AM-01 400 kV AZARA - BONGAIGAON AM-02 AM-10 BNC END OF PAVOI -1 AM-12 AM-11 BNC END OF PAVOI -2 AM-13 AM-04 UMRANGSHU END OF 132KV KHANDONG * AM-05 UMRANGSHU END OF 132KV HAFLONG * * No back up for SEMs at 33 KV feeders, average reading of previous period taken in case of non-availbility of meter reading. # Back up for this feeder is determined from the operational configuration at the 33 KV level. For Net Drawal of Assam, two fictitious meters AS-51 & AS-61 are used. Assam Drawal = (AS-51) + (AS-61) (AS-51) = - (AS-01) - (AS-02) - (AS-03) - (AS-04) + (NG-08) - (AS-06) - (AS-07)

- (AS-08) - (AS-09) – (AS-50) + (MN-06) + (AS-11) - (AS-12) + (AR-04) +(AS-14) – (AS-77) – (AS-78) + (KK-20) + (AS-30) + (AS-31) - (AS-17) - (AS-18) + (AS-42) + (AS-56) + (AS-57) - (AS-52) – (AS-73)

(AS-61) = - (AS-46)*1.0309 - (AS-47)*1.0309 - (AS-48)*1.0309 - (AS-49)*1.0309

+ (KT-15) + (KT-16)

14

In case of 33 KV feeders a factor of 1.0309 is used at the sending end (ASEB) presuming 4% loss is being incurred by ASEB for wheeling of power through these feeders (As mutually agreed).

Manipur interconnection with Grid

Following main and back up meters are used for calculating Manipur state drawal. Location ID of Manipur meters is denoted as MN-XX (where XX is ID no. of meters).

MAIN

METER LOC ID


MN-01 132kV IMPHAL(S) - IMPHAL (PG) - 1 MN-05 ZZ-01 132kV IMPHAL(S) - IMPHAL (PG) - 2 MN-16 MN-03 132kV KARONG - KOHIMA NG-02 MN-04 132/33kV TRF AT JIRIBAM (MANIPUR

CONSUMPTION) *

MN-10 132kV IMPHAL(PG) - NINGTHOUKONG MN-17 MN-12 132kV JIRIBAM(PG) - JIRIBAM(MN) @ MN-13 IMPHAL(PG) END ICT- 1 *

15

MN-14 IMPHAL(PG) END ICT- 2 * LO-01 132 KV LOKTAK - RENGPANG MN-11 LO-04 132 KV LOKTAK - NINGTHOUKHONG MN-02

* Using net bus of Jiribam substation and @ indicates no back-up meters. For Net Drawal of Manipur, one fictitious meter MN-51 is used.

(MN-51)= +(MN-05)+(LO-04)-(MN-03)+(MN-04)+(LO-01)+(MN-12)+(MN-10)+(MN-16)+(MN-13)+(MN-14)

MEGHALAYA interconnection with Grid

Following main and back up meters are used for calculating Meghalaya state drawal. Location ID of Meghalaya meters is denoted as ME-XX (where XX is ID no. of meters).

16

MAIN METERS BACK UP METERS

MAIN METER LOC ID


ME-01 132kV LUMSHNONG- PANCHGRAM AS-06

ME-02 132kV KHLRT (MeSEB) - KHLRT(PG) - 1 ME-06

ME-03 132kV UMTRU - KAHELIPARA - 1 AS-01

ME-04 132kV UMTRU - KAHELIPARA - 2 AS-02

ME-05 132kV UMTRU - SARUSAJAI - 2 AS-50

ME-07 132kV UMTRU - SARUSAJAI - 1 AS-09

ME-09 132kV KHLRT (PG) - KHLRT(MeSEB) -2 ME-08

AS-70 220kV MISA - BYRNIHAT(KILLING) - 1 ME-12

AS-72 220kV MISA - BYRNIHAT(KILLING) - 2 ME-13

ME-14 400kV BYRNIHAT(KILLING) - B'GAON AM-03

ME-15 400kV BYRNIHAT(KILLING) - SILCHAR - 2

AS-85

AS-86 132kV AGIA - N 'BIBRA ME-16

For Net Drawal of Meghalaya, one fictitious meter ME-51 is used. (ME-51)=-(ME-01)-(ME-03)-(ME-04)-(ME-15)+(AS-50)+(AS-09)+(AS-70)+(AS-72)-(ME-02)-(ME-08)+(AS-86)-(ME-14) Mizoram interconnection with Grid

M IZORAM

C E N T R A L

S E C T O R

132KV Line


Zemabawk Aizawl(PG)

MZ-01

I

Aizawl(PG)

MZ-02

II Zemabawk

Aizawl(PG)

MZ-08

Kolasib

Badarpur(PG

AS-23

Kolasib

MZ-12

MZ-11

17

Following main and back up meters are used for calculating Mizoram state drawal.

Location ID of Mizoram meters is denoted as MZ-XX (where XX is ID no. of meters).

MAIN METER LOC ID FEEDER NAME BACK UP

METER LOC ID MZ-01 132kV AIZAWL(PG) - ZEMABAWK -1 *

MZ-02 132kV AIZAWL(PG) - ZEMABAWK -2 *

MZ-11 132kV KOLASIB - BADARPUR(PG) AS-23

MZ-12 132kV KOLASIB - AIZAWL(PG) MZ-08

* Using net bus of Aizawl(PG) substation

For Net Drawal of of Mizoram, one fictitious meter MZ-51 is used.

MZ-51 = + (MZ-01) + (MZ-02) - (MZ-11) - (MZ-12)

Nagaland interconnection with Grid

Main Meter

132KV Line

Back Up Meter

18

Following main and back up meters are used for calculating Nagaland state drawal. Location ID of Nagaland meters is denoted as NG-XX (where XX is ID no. of meters). MAIN METER LOC ID


NG-01 132 kV DIMAPUR (PG) - DIMAPUR (S) -1

NG-11

NG-02 132 kV KOHIMA - KARONG MN-03

NG-03 66 kV DIMAPUR (S) - BOKAJAN AS-12

DY-03 132 kV DHEP - KOHIMA / WOKHA NG-04

DY-04 132 kV DHEP - MOKOKCHUNG NG-05

NG-16 132kV DIMAPUR(PG) - KOHIMA(S) NG-19

NG-17 132kV DIMAPUR (PG) - DIMAPUR(S) -2 NG-18

AS-46 33kV GORGAON - NAGINIMORA *

AS-47 33kV MARIANI - CHANKI *

NG-20 132kV MOKOCHANG(S) - MOKOK(PG) -1 # NG-21 132kV MOKOCHANG(S) - MOKOK(PG) -2 # * Joint meter readings are considered in case of non-availability of main meter readings pertaining to LT feeders. For Net Drawal of Nagaland, one fictitious meter NG-51 is used.

NG-51= + (NG-01) + (AS-12) + (MN-03) + (DY-03) + (DY-04) + (AS-46) + (AS-47) +(NG-16)+(NG-17)+(NG-20)+(NG-21)

Tripura interconnection with Grid

19

Following main and back up meters are used for calculating Tripura state drawal. Location ID of Tripura meters is denoted as TR-XX (where XX is ID no. of meters).

MAIN METER LOC ID


TR-01 132 kV AGARTALA - AGTPP - 1 AG-01 TR-02 132 kV AGARTALA - AGTPP - 2 AG-02 TR-04 132 kV KUMARGHAT(PG) -

P.K.BARI TR-03

TR-06 132 kV DHARMANAGAR - DULLAV

AS-08

PL-03 132 kV PALATAN - UDAIPUR -1 TR-14 PL-04 132 kV PALATANA - SM NAGAR TR-13 TR-15 132 kV PK'BARI - SILCHAR -1 ZZ-24 TR-16 132 kV PK'BARI - SILCHAR -2 ZZ-25

* Using net bus of Kumarghat(PG) substation. For Net drawal of Tripura, one fictitious meter TR-51 is used. (TR-51)= -(TR-01) -(TR-02) +(TR-04) -(TR-06) +(PL-03) +(PL-04) -(TR-15) -(TR-16)

ER - NER interconnection

20

LEGEND

Following main and back up meters are used for calculating Eastern Regional drawal. Location ID of Eastern Region meters is denoted as ER-XX (where XX is ID no. of meters).

MAIN METER LOC ID


AS-25 400 kV Bongaigaon - Binaguri -I ER-01

21

AS-26 400 kV Bongaigaon - Binaguri -II ER-02 AS-96 400 kV Bongaigaon - Binaguri -III ER-09 AS-97 400 kV Bongaigaon - Binaguri -IV ER-10 AS-32 132 kV Salakati - Gelephu ER-05 AS-33 220 kV Salakati - Birpara -I ER-03 AS-34 220 kV Salakati- Birpara -II ER-04 AS-73 132 kV Rangia - Motanga

(Deothang) ER-08

For Net Drawal of Eastern Region, one fictitious meter ER-51 is used.

ER-51 = -(AS-25) -(AS-26) +(ER-05) -(AS-33) -(AS-34) +(ER-08) +(ER-09) +(ER-10)

DOYANG Interconnection with Grid

LEGEND

Following main and back up meters are used for calculating Doyang injection. Location

ID of Doyang meters is denoted as DY-XX (where XX is ID no. of meters). For Net injection of Doyang, one fictitious meter DY-71 is used.

MAIN METER LOC ID

FEEDER NAME BACK UP

METER LOC ID

DY-01 132kV DHEP - DIMAPUR(PG) - 1 NG-14 DY-02 132kV DHEP - DIMAPUR(PG) -2 NG-15

N A G A L A N D

D O Y A N G

Doyang Kohima

DY-03 NG-04


132KV Line

Future Line

C

T

U

Doyang Dimapur

DY-01 NG-14

Ckt-I

Doyang Dimapur

DY-02 NG-15

Ckt-II

Doyang M’Chang

DY-04 NG-05

22

DY-03 132kV DHEP - KOHIMA NG-04

DY-04 132kV DHEP - MOKOKCHUNG NG-05 DY-71 = +(DY-01) +(DY-02) +(DY-03) +(DY-04)

Following main and back up meters are used for calculating Khandong and Kopili-II injection. Location ID of Khandong and Kopili-II meters is denoted as KD-XX (where XX is ID no. of meters).

MAIN METER LOC ID

FEEDER NAME BACK UP

METER LOC ID

KK-01 132kV KHANDONG - HAFLONG AS-69 KK-02 132kV KHANDONG - KHLRT - 1 ME-10 KK-03 132kV KHANDONG - KHLRT - 2 ME-11 KK-04 132kV KHANDONG - KOPILI-1 KK-08 KK-22 132kV KHANDONG - KOPILI-2 KK-21

For Net injection of Khandong, one fictitious meter KD-71 is used.

KD-71 = +(KK-01)+ (KK-02) + (KK-03) + (KK-04) + (KK-20) + (AS-14) - (KK-17) +(KK-19) Net injection of Kopili-II is the summation of (KK-17) & (KK-19). Kopili-II injection = + (KK-17) - (KK-19)

23

KOPILI Interconnection with Grid

LEGEND

Following main and back up meters are used for calculating Kopili injection. Location

ID of Kopili meters is denoted as KK-XX (where XX is ID no. of meters).


KK-05 220 KV Kopili Misa Feeder-I AS-66 KK-06 220 KV Kopili Misa Feeder-II AS-67 KK-07 220 KV Kopili Misa Feeder-III AS-68 KK-08 132 KV Kopili Khandong-I KK-04 KK-21 132 KV Kopili Khandong-II KK-22

For Net injection of Kopili, one fictitious meter KP-71 is used. KP-71 = + (KK-05) + (KK-06) + (KK-07) + (KK-08) + (KK-21)

KATHALGURI Interconnection with Grid

A S S A M

K A T H

Kathalguri Mariani

KT-01 AS-03

K

O

P

I

L

I

220 KV Line

Back Up Meter

132 KV Line

Main Meter

C

T

U

Kopili Misa

KK-06 AS-67

Ckt-II

Kopili Khandong

KK-08 KK-04

K’

D O N G

Kopili Misa

KK-05 AS-66

Ckt-I

Kopili Misa

KK-07 AS-68

Ckt-III

Kopili Khandong

KK-21 KK-22

I

II

Kathalguri Tinsukia

KT-15 AS-53

I

24

LEGEND

Following main and back up meters are used for calculating Kathalguri injection. Location ID of Kathalguri meters is denoted as KT-XX (where XX is ID no. of meters).

MAIN

METER LOC ID

FEEDER NAME BACK UP

METER LOC ID

KT-01 220 kV KATHALGURI - MARIANI AS-03

KT-02 220 kV KATHALGURI - MARIANI(PG) AS-94

KT-14 220 kV KATHALGURI - DEOMALI AR-07 KT-15 220 kV KATHALGURI - TINSUKIA - 1 AS-53 KT-16 220 kV KATHALGURI - TINSUKIA - 2 AS-74

For Net injection of Kathalguri, one fictitious meter KT-71 is used.

KT-71 = + (KT-01) + (KT-02) + (KT-14) + (KT-15) + (KT-16)

LOKTAK Interconnection with Grid

L

O

K

C

T

U

Loktak Imphal

LO-03 MN-15

Loktak Jiribam

LO-02 MN-09

Ckt-II

Main Meter

220 KV Line Back Up Meter

CTU

Kathalguri Tinsukia

KT-16 AS-74

II

Kathalguri Deomali

KT-14 AR-07

Kathalguri Mariani(PG

KT-02 AS-94

A

P

25

LEGEND

Following main and back up meters are used for calculating Loktak injection. Location ID of Loktak meters is denoted as LO-XX (where XX is ID no. of meters).

MAIN

METER LOC ID

FEEDER NAME BACK UP METER LOC

ID LO-01 132 kV LOKTAK - RENGPANG - 1 MN-11 LO-02 132 kV LOKTAK - JIRIBAM - 2 MN-09 LO-03 132 kV LOKTAK - IMPHAL (PG) MN-15 LO-04 132 kV LOKTAK -

NINGTHOUKHONG MN-02

For Net injection of Loktak, one fictitious meter LO-71 is used. LO-71 = + (LO-01) + (LO-02) + (LO-03) + (LO-04)

R C NAGAR Interconnection with Grid

C T U

R C

N

RC Nagar Kumarghat

AG-03 TR-11

132 KV Line

Main Meter Back Up Meter

Loktak Rempang

LO-01 MN-11

Ckt-I M A N I P U R

Loktak N’Kong

LO-04 MN-02

26

LEGEND

Following main and back up meters are used for calculating R C Nagar injection. Location ID of R C Nagar meters is denoted as AG-XX (where XX is ID no. of meters).


AG-01 132 kV R C Nagar Agartala Feeder-I TR-01 AG-02 132 kV R C Nagar Agartala Feeder-II TR-02 AG-03 132 kV R C Nagar Kumarghat Feeder TR-11

For Net injection of RC Nagar, one fictitious meter AG-71 is used. AG-71 = + (AG-01) + (AG-02) + (AG-03)

Following main and back up meters are used for calculating Ranganadi injection. Location ID of Ranganadi meters is denoted as RN-XX (where XX is ID no. of meters).

Main Meter

132KV Line Back Up Meter

T R I P U R A

RC Nagar Agartala

AG-01 TR-01

Ckt-I

RC Nagar Agartala

AG-02 TR-02

Ckt-II

27

MAIN METER LOC ID

FEEDER NAME BACK UP

METER LOC ID

RN-01 132 kV RHEP - NIRJULI * RN-02 400 kV RHEP - BNC LILO - 1 AM-16 RN-03 400 kV RHEP - BNC LILO - 2 AM-20 RN-11 132 kV RHEP - ZIRO AR-06 RN-12 33 kV RHEP - PARE-2 *

For Net injection of Ranganadi, one fictitious meter RN-71 is used. RN-71 = + (RN-01) + (RN-02) + (RN-03) + (RN-11)+(RN-12)

Palatana (OTPC) Interconnection with Grid

MAIN METER LOC ID

FEEDER NAME BACK UP

METER LOC ID

PL-01 400 kV PALATANA - SILCHAR -1 AS-83 PL-02 400 kV PALATANA - SILCHAR -2 AS-84 PL-03 132 kV PALATANA - UDAIPUR -1 TR-14 PL-04 132 kV PALATANA - SM NAGAR TR-13

(PL-71)= +(PL-01)+(PL-02)+(PL-03)+(PL-04)

28

NTPC(BGTR) Interconnection with the Grid

MAIN

METER LOC ID

FEEDER NAME BACK UP

METER LOC ID

NT-11 400 kV NTPC(B'GAON) - BONGAIGAON -1 AS-98

NT-12 400 kV NTPC(B'GAON) - BONGAIGAON -2 AS-99

2.6 Master Database of SEMs in NER

AG-01 NP-9081-A 0600 1200.0000 AGTPP END OF AGARTALA-1 FDR AG-02 NP-9093-A 0600 1200.0000 AGTPP END OF AGARTALA-2 FDR AG-03 NP-9080-A 0600 1200.0000 AGTPP END OF K'GHAT FDR AG-04 NP-6857-A 0250 1200.0000 AGTPP GTG-1 AG-05 NP-6858-A 0250 1200.0000 AGTPP GTG-2 AG-06 NP-6859-A 0250 1200.0000 AGTPP GTG-3 AG-07 NP-6864-A 0250 1200.0000 AGTPP GTG-4 AG-08 NP-6853-A 0050 1200.0000 AGTPP STN TRF-1 AG-09 NP-6852-A 0050 1200.0000 AGTPP STN TRF-2 AG-10 NP-8802-A 0150 0060.0000 AGTPP STG-2 STUPPOW AG-11 NP-9082-A 0250 1200.0000 AGTPP STG-2 AG-12 NP-9079-A 0250 1200.0000 AGTPP STG-1 AR-01 NP-5825-A 0300 1200.0000 NIRJULI TRF INCOMER-1

29

AR-02 NP-5824-A 0300 1200.0000 NIRJULI TRF INCOMER-2 AR-03 NP-6031-A 0600 1200.0000 NRJ (PG) END OF 132kV RNG FDR AR-04 NP-5771-A 0300 1200.0000 NRJ (PG) END OF 132kV GOHPUR FDR AR-05 NP-8372-A 0300 1200.0000 NAHARLAGUN 132KV FDR AR-06 NP-6878-A 0150 1200.0000 ZIRO END OF 132KV RANGANADI FDR AR-07 NP-4206-A 0400 2000.0000 DEOMALI END OF 220KV KATHALGURI FDR AS-01 NP-8490-A 0400 1200.0000 KAHELIPARA END OF UMTRU-1 FDR AS-02 NP-8488-A 0400 1200.0000 KAHELIPARA END OF UMTRU-2 FDR AS-03 NP-6888-A 0800 2000.0000 MARIANI END OF KATHALGURI FDR AS-04 NP-6886-A 0800 2000.0000 MARIANI END OF MISA FDR AS-05 NP-6887-A 0400 1200.0000 MARIANI END OF GOLAGHAT FDR AS-06 NP-6876-A 0400 1200.0000 PANCHGRAM END OF LUMSHONG FEEDER AS-07 NP-6872-A 0600 1200.0000 PANCHGRAM END OF BDP (PG)FDR AS-08 NP-6946-A 0400 1200.0000 DULLAVCHERRA END OF D'NGAR FDR AS-09 NP-8489-A 0400 1200.0000 S'SAJAI END OF 132kV UMTRU FDR-1 AS-10 NP-8498-A 0400 1200.0000 PAILAPOOL END OF JIRIBAM FDR AS-11 NP-8494-A 0050 1200.0000 HAFLONG CONSUMPTION AS-12 NP-8482-A 0300 0600.0000 BOKAJAN END OF 66 kV DIMAPUR FEEDER AS-13 NP-6907-A 0300 1200.0000 GOHPUR END OF 132KV NIRJULI FDR AS-14 NP-5781-A 0200 0300.0000 UMRANGSOO CONSUMPTION AS-15 NP-9070-A 0800 2000.0000 BTPS END OF SALAKATI FDR-2 AS-16 NP-8476-A 0800 2000.0000 BTPS END OF SALAKATI FDR-1 AS-17 NP-5797-A 0500 2000.0000 SAMAGURI END OF MISA-1 FDR AS-18 NP-5796-A 0500 2000.0000 SAMAGURI END OF MISA-2 FDR AS-19 NP-5795-A 0400 2000.0000 SAMAGURI END OF BALIPARA-1 FDR AS-20 FUTURE SAMAGURI END OF BALIPARA-2 FDR AS-21 NP-6870-A 0600 1200.0000 BDP (PG) END OF JIRIBAM FEEDER AS-22 NP-6871-A 0600 1200.0000 BDP (PG) END OF PANCHGRAM FEEDER AS-23 NP-6873-A 0600 1200.0000 BDP (PG) END OF KOLASIB FDR AS-24 NP-6874-A 0300 1200.0000 BADARPUR (PG) END OF KHLRT FEEDER AS-25 NP-8468-A 1000 3636.3636 B'GAON END OF BINAGURI-1 FEEDER AS-26 NP-8469-A 1000 3636.3636 B'GAON END OF BINAGURI-2 FEEDER AS-27 NP-5318-A 1000 3636.3636 B'GAON 400/220kV ICT(HV SIDE) AS-28 NP-5311-A 1000 3636.3636 B'GAON END OF BLP-1 FEEDER AS-29 NP-5316-A 1000 3636.3636 B'GAON END OF BLP-2 FEEDER AS-30 NP-5314-A 0800 2000.0000 SALAKATI END OF BTPS-1 FDR AS-31 NP-5297-A 0800 2000.0000 SALAKATI END OF BTPS-2 FDR AS-32 NP-8379-A 0600 1200.0000 SALAKATI END OF BHUTAN FEEDER AS-33 NP-7581-A 0800 2000.0000 SALAKATI END OF BIRPARA-1 FDR AS-34 NP-5303-A 0800 2000.0000 SALAKATI END OF BIRPARA-2 FDR AS-35 NP-5299-A 1000 3636.3636 MISA END OF BALIPARA-1 FDR AS-36 NP-5291-A 1000 3636.3636 MISA END OF BALIPARA-2 FDR AS-37 NP-8605-A 0800 2000.0000 MISA END OF MARIANI FDR AS-38 NP-8634-A 0500 2000.0000 MISA END OF SMG-1 FDR AS-39 NP-8637-A 0500 2000.0000 MISA END OF SMG-2 FDR AS-40 NP-8599-A 1200 2000.0000 MISA 400/220KV ICT (LV SIDE) AS-41 NP-5309-A 1000 3636.3636 BALIPARA 400/220KV ICT (HV) AS-42 NP-5307-A 0800 2000.0000 BALIPARA END OF SAMAGURI FDR-1 AS-43 FUTURE BALIPARA END OF SAMAGURI FDR-2 AS-44 NP-5310-A 1000 3636.3636 BALIPARA END OF RANGANADI FDR-1 AS-45 NP-5308-A 1000 3636.3636 BALIPARA END OF RANGANADI FDR-2 AS-46 NP-4139-A 0200 0300.0000 GORGAON END OF 33KV NAGINIMORA FDR AS-47 NP-6893-B 0040 0300.0000 MARIANI END OF 33KV CHANKI FDR AS-48 NP-0335-A 0100 0300.0000 RUPAI END OF 33KV NAMSAI FDR AS-49 NP-0639-B 0010 0300.0000 LEKHAPANI END OF 33KV JAIRAMPUR FDR AS-50 NP-8492-A 0400 1200.0000 S'SAJAI END OF 132kV UMTRU FDR-2 AS-52 NP-6885-A 0400 1200.0000 MARIANI END OF 132KV MOKOKCHANG FDR AS-53 NP-8383-A 0400 2000.0000 TINSUKIA END OF 220KV KTG FDR-I AS-54 NP-6891-A 0300 1200.0000 BALIPARA-KHUPI 220/132KV (LV) ICT AS-55 NP-5306-A 0300 1200.0000 BALIPARA END OF 132kV KHUPI FDR AS-56 NP-6149-A 0400 1200.0000 BALIPARA END OF 132KV DEPOTA FDR AS-57 NP-6150-A 0400 1200.0000 BALIPARA END OF 132KV GOHPUR FDR AS-58 NP-6890-A 0250 1200.0000 BALIPARA-ASEB 220/132KV (LV) ICT AS-59 NP-6147-A 0400 1200.0000 GOHPUR END OF 132KV BALIPARA FDR AS-60 NP-6151-A 0250 2000.0000 BALIPARA-ASEB 220/132KV (HV) ICT AS-62 NP-6868-A 0200 2000.0000 BALIPARA-KHUPI 220/132KV (HV) ICT

30

AS-63 NP-5321-A 0400 1200.0000 BOKAJAN END OF 132KV DIMAPUR (PG) FDR AS-64 NP-6877-A 0400 1200.0000 GOLAGHAT END OF 132KV BOKAJAN FDR AS-65 NP-8608-A 0800 2000.0000 MISA END OF KATHALGURI FDR AS-66 NP-8641-A 0500 2000.0000 MISA END OF KOPILI-1 FDR AS-67 NP-8636-A 0800 2000.0000 MISA END OF KOPILI-2 FDR AS-68 NP-8603-A 0800 2000.0000 MISA END OF KOPILI-3 FDR AS-69 NP-8502-A 0400 1200.0000 HAFLONG END OF KHD FDR AS-70 NP-9092-A 0800 2000.0000 MISA END OF 220KV BYRNIHAT-I AS-72 NP-9091-A 0800 2000.0000 MISA END OF 220KV BYRNIHAT-II AS-73 NP-8368-A 0300 1200.0000 RANGIA END OF MOTONGA (DEOTHANG) AS-74 NP-8386-A 0800 2000.0000 TINSUKIA END OF KATHALGURI-II AS-75 NP-8664-A 0500 1200.0000 SILCHAR END OF SRIKONA-I AS-76 NP-8665-A 0500 1200.0000 SILCHAR END OF SRIKONA-II AS-77 NP-8562-A 0300 1200.0000 SRIKONA END OF SILCHAR-I AS-78 NP-8668-A 0300 1200.0000 SRIKONA END OF SILCHAR-II AS-79 NP-7594-A 0400 1200.0000 PANCHGRAM END OF SILCHAR AS-80 NP-7596-A 0400 1200.0000 DULLAVCHERA END OF SILCHAR AS-81 NP-8666-A 0500 1200.0000 SILCHAR END OF DULLAVCHERA AS-82 NP-8667-A 0500 1200.0000 SILCHAR END OF PANCHGRAM AS-83 NP-8659-A 1000 3636.3636 SILCHAR END OF PALATANA-I AS-84 NP-8660-A 1000 3636.3636 SILCHAR END OF PALATANA-II AS-85 NP-8661-A 1000 3636.3636 SILCHAR END OF BYRNIHAT-II AS-86 NP-8484-A 0400 1200.0000 AGIA END OF NANGALBIBRA AS-87 NP-8643-A 0500 1200.0000 MISA END OF DIMAPUR-I AS-88 NP-8640-A 0500 1200.0000 MISA END OF DIMAPUR-II AS-89 NP-8561-A 1000 3636.3636 SILCHAR END OF 400 KV AZARA AS-90 NP-8656-A 0400 1200.0000 HAFLONG END OF JIRIBAM AS-91 NP-8493-A 0600 1200.0000 BADARPUR END OF SILCHAR-1 AS-92 NP-8495-A 0600 1200.0000 BADARPUR END OF SILCHAR-2 AS-93 NP-8588-A 2000 3636.3636 AZARA END OF 400 KV SILCHAR AS-94 NP-8596-A 0800 2000.0000 MARIANI (PG) END OF 220 KV KATHALGURI AS-95 NP-8591-A 0800 2000.0000 MARIANI (PG) END OF 220 KV MISA AS-96 NP-9072-A 2000 3636.3636 BONGAIGAON (PG) END OF 400KV NEW SILIGURI-3 AS-97 NP-9069-A 2000 3636.3636 BONGAIGAON (PG) END OF 400 KV NEW SILIGURI-4 AS-98 NP-8587-A 1000 3636.3636 BONGAIGAON (PG) END OF 400 KV NTPC_BgTPP-1 AS-99 NP-8651-A 1000 3636.3636 BONGAIGAON (PG) END OF 400 KV NTPC_BgTPP-2 AM-01 NP-8658-A 2000 3636.3636 AZARA END OF 400 KV BONGAIGAON AM-02 NP-8613-A 1000 3636.3636 BONGAIGAON END OF 400 KV AZARA AM-03 NP-8584-A 1000 3636.3636 BONGAIGAON END OF 400 KV BYRNIHAT AM-04 NP-5290-A 0300 1200.0000 UMRANGSOO END OF 132 KV KHANDONG AM-05 NP-5295-A 0300 1200.0000 UMRANGSOO END OF 132 KV HAFLONG AM-06 NP-9059-A 2000 3636.3636 BNC END OF 400 KV BALIPARA-1 AM-07 NP-9060-A 2000 3636.3636 BNC END OF 400 KV BALIPARA-2 AM-08 NP-9061-A 4000 3636.3636 AC SIDE CONV. TRF POLE-1 OF BNC AM-09 NP-9089-A 0600 3636.3636 BNC END 400/132 KV ICT-II HV SIDE AM-10 NP-4500-A 0400 1200.0000 BNC END OF PAVOI-I AM-11 NP-4502-A 0400 1200.0000 BNC END OF PAVOI-II AM-12 NP-4505-A 0300 1200.0000 PAVOI END OF BNC-I AM-13 NP-8801-A 0300 1200.0000 PAVOI END OF BNC-II AM-14 NP-4496-A 0200 0300.0000 33 KV BNC-1 AM-15 NP-9062-A 2000 3636.3636 BNC END OF BLP-II LILO AM-16 NP-9088-A 2000 3636.3636 BNC END OF RANGANADI-II LILO AM-17 NP-9085-A 4000 3636.3636 BNC END BUS SECTION -I AM-18 NP-9084-A 4000 3636.3636 BNC END BUS SECTION -II AM-19 NP-9063-A 2000 3636.3636 BNC END OF BLP-I LILO AM-20 NP-9086-A 2000 3636.3636 BNC END OF RANGANADI-I LILO AM-21 NP-9087-A 0600 3636.3636 BNC END 400/132 KV ICT-I HV SIDE AM-22 NP-7601-A 4000 3636.3636 BNC END TIE-BAY OF CONV. TRF. POLE-1. AM-23 NP-4512-A 0200 0300.0000 33 KV BNC-2 AM-24 NP-6854-A 4000 3636.3636 BNC END TIE-BAY OF CONV. TRF. POLE-2. AM-25 NP-5798-A 4000 3636.3636 BNC END MAIN-BAY OF CONV. TRF. POLE-2. AM-26 NP-5800-A 1000 3636.3636 BALIPARA ICT-2 HV-SIDE. AM-27 NP-5800-A 0800 2000.0000 BALIPARA ICT-2 LV-SIDE. DY-01 NP-9066-A 0300 1200.0000 DOYANG END OF 132KV DIMAPUR-1 FDR DY-02 NP-9050-A 0300 1200.0000 DOYANG END OF 132KV DIMAPUR-2 FDR DY-03 NP-5279-A 0300 1200.0000 DOYANG END OF 132KV KOHIMA FDR

31

DY-04 NP-9053-A 0300 1200.0000 DOYANG END OF 132KV MOKOK FDR DY-05 NP-9052-A 0025 1200.0000 DOYANG STN TRF DY-06 NP-5768-A 0125 1200.0000 DOYANG GT-1 DY-07 NP-5803-A 0125 1200.0000 DOYANG GT-2 DY-08 NP-5827-A 0125 1200.0000 DOYANG GT-3 ER-01 NP-5884-A 1000 3636.3636 BINAGURI END OF BONG FDR-1 ER-02 NP-5885-A 1000 3636.3636 BINAGURI END OF BONG FDR-2 ER-03 NP-6462-A 0800 2000.0000 BIRPARA END OF SALAKATI-1 ER-04 NP-6463-A 0800 2000.0000 BIRPARA END OF SALAKATI-2 ER-05 LT-0245-A 0600 1200.0000 GELEPHU END OF SALAKATI FDR ER-06 NP-8804-A 0500 3636.3636 DURGAPUR FREQ BACKUP METER-1 ER-07 NP-6460-A 0500 3636.3636 DURGAPUR FREQ BACKUP METER-2 ER-08 NP-8380-A 0300 1200.0000 MOTANGA END OF 132 KV RANGIA ER-09 NP-7917-A 2000 3636.3636 BINAGURI END OF 400 KV BONGAIGAON-3 ER-10 NP-7918-A 2000 3636.3636 BINAGURI END OF 400 KV BONGAIGAON-4 KK-01 NP-5780-A 0300 1200.0000 KHANDONG END OF HAFLONG FDR KK-02 NP-5809-A 0300 1200.0000 KHANDONG END OF KHLRT FDR-1 KK-03 NP-5774-A 0600 1200.0000 KHANDONG END OF KHLRT FDR-2 KK-04 NP-5773-A 0600 1200.0000 KHANDONG END OF KOPILI FDR-1 KK-05 NP-8609-A 0500 2000.0000 KOPILI END OF MISA-1 FDR KK-06 NP-8616-A 0500 2000.0000 KOPILI END OF MISA-2 FDR KK-07 NP-8617-A 0500 2000.0000 KOPILI END OF MISA-3 FDR KK-08 NP-8614-A 0600 1200.0000 KOPILI END OF KHANDONG FDR-1 KK-09 NP-5783-A 0025 0300.0000 KHANDONG 33KV STN TRF KK-10 NP-5775-A 0050 1200.0000 KHANDONG 132/33KV ICT KK-11 NP-5779-A 0150 1200.0000 KHANDONG GT-1 KK-12 NP-6153-A 0150 1200.0000 KHANDONG GT-2 KK-13 NP-8674-A 0200 2000.0000 KOPILI GT-1 KK-14 NP-8615-A 0200 2000.0000 KOPILI GT-2 KK-15 NP-8618-A 0200 2000.0000 KOPILI GT-3 KK-16 NP-8611-A 0200 2000.0000 KOPILI GT-4 KK-17 NP-5810-A 0200 1200.0000 KOPILI GT-2 OF STG-2 KK-18 NP-6155-A 0200 0300.0000 LV SIDE OF 132/33KV TRF KK-19 NP-5776-A 0025 0300.0000 KOPILI STG-2 33KV STN TRF KK-20 NP-6154-A 0200 0300.0000 33KV DAMSITE FDR (NEEPCO) KK-21 NP-8610-A 0600 1200.0000 KOPILI END OF KHANDONG FDR-2 KK-22 NP-6882-A 0600 1200.0000 KHANDONG END OF KOPILI FDR-2 KK-23 NP-8620-A 0050 1200.0000 KOPILI 5 MVA STN TRF KT-01 NP-5785-A 0800 2000.0000 KATHALGURI END OF MARIANI FDR KT-02 NP-5784-A 0800 2000.0000 KATHALGURI END OF MISA FDR KT-03 NP-5804-A 0150 2000.0000 KATHALGURI GT-1 KT-04 NP-5805-A 0150 2000.0000 KATHALGURI GT-2 KT-05 NP-5806-A 0150 2000.0000 KATHALGURI GT-3 KT-06 NP-5807-A 0150 2000.0000 KATHALGURI GT-4 KT-07 NP-5818-A 0150 2000.0000 KATHALGURI GT-5 KT-08 NP-5819-A 0150 2000.0000 KATHALGURI GT-6 KT-09 NP-5820-A 0150 2000.0000 KATHALGURI GT-7 KT-10 NP-5822-A 0150 2000.0000 KATHALGURI GT-8 KT-11 NP-5823-A 0150 2000.0000 KATHALGURI GT-9 KT-12 NP-5789-A 0050 2000.0000 KATHALGURI STN TRF-1 KT-13 NP-5791-A 0050 2000.0000 KATHALGURI STN TRF-2 KT-14 NP-5787-A 0400 2000.0000 KTG END OF 220kV DEOMALI FDR KT-15 NP-5786-A 0800 2000.0000 KTG END OF 220kV TINSUKIA -I KT-16 NP-5778-A 0800 2000.0000 KTG END OF 220kV TINSUKIA -II LO-01 NP-9065-A 0400 1200.0000 LOKTAK END OF RENGPANG FDR LO-02 NP-9064-A 0400 1200.0000 LOKTAK END OF JIRIBAM-2 FDR LO-03 NP-9044-A 0400 1200.0000 LOKTAK END OF IMPHAL PG FDR LO-04 NP-9045-A 0400 1200.0000 LOKTAK END OF NINGTHOUKHONG FDR LO-05 NP-9048-A 2500 0100.0000 LOKTAK GT-1 LO-06 NP-9047-A 2500 0100.0000 LOKTAK GT-2 LO-07 NP-9046-A 2500 0100.0000 LOKTAK GT-3 LO-08 NP-9067-A 0050 1200.0000 LOKTAK STN TRF ME-01 NP-8384-A 0400 1200.0000 LUMSHNONG END OF PANCHGRAM FDR ME-02 NP-6865-A 0600 1200.0000 KHLRT (MeSEB) END OF KHLRT (PG) FDR-1 ME-03 NP-8474-A 0400 1200.0000 UMTRU END OF KAHELIPARA-1 ME-04 NP-8475-A 0400 1200.0000 UMTRU END OF KAHELIPARA-2

32

ME-05 NP-8491-A 0400 1200.0000 UMTRU END OF S'SUJAI FDR-2 ME-06 NP-6881-A 0300 1200.0000 KHLRT (PG) END OF KHLRT (MeSEB) FDR-1 ME-07 NP-8473-A 0400 1200.0000 UMTRU END OF S'SUJAI FDR-1 ME-08 NP-6866-A 0400 1200.0000 KHLRT (MeSEB) END OF KHLRT (PG) FDR-2 ME-09 NP-6880-A 0600 1200.0000 KHLRT (PG) END OF KHLRT (MeSEB) FDR-2 ME-10 NP-6883-A 0300 1200.0000 KHLRT END OF KHANDONG-1 FDR ME-11 NP-6884-A 0600 1200.0000 KHLRT END OF KHANDONG-2 FDR ME-12 NP-6856-A 0800 2000.0000 BYRNIHAT END OF 220KV MISA-I ME-13 NP-5302-A 0800 2000.0000 BYRNIHAT END OF 220KV MISA-II ME-14 NP-8370-A 1000 3636.3636 BYRNIHAT END 400kv BONGAIGAON ME-15 NP-8371-A 1000 3636.3636 BYRNIHAT END OF 400KV SILCHAR FEEDER II ME-16 NP-8487-A 0400 1200.0000 NANGALBIBRA END OF 132KV AGIA FEEDER MN-01 NP-6950-A 0400 1200.0000 IMPHAL(S) END OF IMPH PG FDR-I MN-02 NP-8375-A 0600 1200.0000 NINGTHOUKHONG END OF LOKTAK FDR MN-03 NP-6949-A 0400 1200.0000 KARONG END OF KOHIMA FDR MN-04 NP-8501-A 0050 1200.0000 JIRIBAM (132/33KV TRF) CONSUMPTION MN-05 NP-8378-A 0600 1200.0000 IMPHAL PG END OF IMPHAL FDR-I MN-06 NP-8499-A 0400 1200.0000 JIRIBAM END OF PLP FDR MN-07 NP-7798-A 0400 1200.0000 JIRIBAM END OF AIZAWL FDR MN-08 NP-7796-A 0400 1200.0000 JIRIBAM END OF HAFLONG FDR MN-09 NP-7797-A 0300 1200.0000 JIRIBAM END OF LOKTAK-2 FDR MN-10 NP-8576-A 0300 1200.0000 IMPHAL PG END OF NINTHONGKHONG MN-11 NP-6909-A 0400 1200.0000 RENGPANG END OF LOKTAK FDR MN-12 NP-8500-A 0300 1200.0000 JIRIBAM (PG) END OF JIRIBAM (MAN) FDR MN-13 NP-8581-A 0300 1200.0000 IMPHAL (PG) END ICT-1 MN-14 NP-8647-A 0300 1200.0000 IMPHAL (PG) END ICT-2 MN-15 NP-8672-A 0300 1200.0000 IMPHAL (PG) END OF LOKTAK-2 MN-16 NP-8670-A 0300 1200.0000 IMPHAL (PG) END OF INPHAL-2 MN-17 NP-4498-A 0400 1200.0000 NINGTHOUKHONG END Of IMPHAL (PG) MN-18 NP-8623-A 0600 1200.0000 JIRIBAM (PG) END OF BADARPUR FDR MZ-01 NP-8485-A 0300 1200.0000 AIZAWL END OF LUANGMUAL FDR MZ-02 NP-8504-A 0300 1200.0000 AIZAWL END OF ZUANGTUI FDR MZ-03 NP-2505-A 0150 1200.0000 BAIRABI END OF 132KV KOLASIB FDR MZ-04 NP-2501-A 0075 1200.0000 HV SIDE OF 11/13 KV TRF-1 MZ-05 NP-4134-A 0075 1200.0000 HV SIDE OF 11/132 KV TRF-2 MZ-06 NP-4133-A 0025 1200.0000 HV SIDE OF 132/11KV TRF (BAIRABI) MZ-07 NP-0445-A 0075 0600.0000 BWK END OF 132/66KV KOLASIB FDR MZ-08 NP-8486-A 0600 1200.0000 AIZAWL (PG) END OF KOLASIB FDR MZ-09 NP-8503-A 0300 1200.0000 AIZAWL (PG) END OF KUMARGHAT FDR MZ-10 NP-8505-A 0400 1200.0000 AIZAWL (PG) END OF JIRIBAM FDR MZ-11 NP-8497-A 0300 1200.0000 KOLASIB END OF BADARPUR (PG) FDR MZ-12 NP-8496-A 0600 1200.0000 KOLASIB END OF AIZAWL (PG) FDR NG-01 NP-8385-A 0300 1200.0000 DIMAPUR (PG) END OF DIMAPUR(S) I FDR NG-02 NP-6867-A 0250 1200.0000 KOHIMA END OF KARONG FDR NG-03 NP-6032-A 0100 0600.0000 DIMAPUR END OF 66 KV BOKAJAN FDR NG-04 FUTURE KOHIMA END OF DOYANG FDR NG-05 NP-4208-A 0100 1200.0000 MOKOKCHUNG END OF DOYANG FDR NG-06 NP-8480-A 0250 2000.0000 DIMAPUR END OF MISA-1 FDR NG-07 NP-5320-A 0250 2000.0000 DIMAPUR END OF MISA-2 FDR NG-08 NP-5287-A 0300 1200.0000 DIMAPUR END OF 132KV BOKAJAN FDR NG-09 NP-5323-A 0600 1200.0000 DIMAPURLV SIDE) 220/132KV ICT-1 NG-10 NP-5322-A 0300 1200.0000 DIMAPUR END OF IMPHAL FEEDER NG-11 NP-5777-A 0400 1200.0000 DIMAPUR (S) END OF DIMAPUR (PG) I LINE NG-12 NP-0298-A 0100 1200.0000 MOKOKCHUNG END OF 132KV MARIANI FDR NG-13 NP-6889-A 0600 1200.0000 DIMAPUR (LV SIDE) 220/132KV ICT-2 NG-14 NP-5319-A 0300 1200.0000 DIMAPUR END OF DOYANG-1 FDR NG-15 NP-5284-A 0300 1200.0000 DIMAPUR END OF DOYANG-2 FDR NG-16 NP-8472-A 0600 1200.0000 DIMAPUR (PG) END OF KOHIMA FDR NG-17 NP-8481-A 0600 1200.0000 DIMAPUR (PG) END OF DIMAPUR(S) II FDR NG-18 NP-8478-A 0400 1200.0000 DIMAPUR(S) END OF DIMAPUR (PG) II FDR NG-19 NP-8479-A 0400 1200.0000 KOHIMA END OF DIMAPUR (PG) FDR NG-20 NP-4517-A 0300 1200.0000 MOKOCHANG (STATE) END OF MOKOK (PG) FDR-1 NG-21 NP-4511-A 0300 1200.0000 MOKOCHANG (STATE) END OF MOKOK ( PG) FDR-2 NR-01 NP-8134-A 4000 3636.3636 AGRA END CONV. TRF-1 AC SIDE. NR-02 NP-8136-A 4000 3636.3636 AGRA END CONV. TRF-1 AC SIDE. NR-03 NP-8108-A 4000 3636.3636 AGRA END CONV. TRF-2 AC SIDE.

33

NR-04 NP-8109-A 4000 3636.3636 AGRA END CONV. TRF-2 AC SIDE. NT-01 NP-8568-A 2000 3636.3636 NTPC END OF 400 KV B'GAON (PG)-1 NT-02 NP-8566-A 2000 3636.3636 NTPC END OF 400 KV-B'GAON (PG)-2 NT-03 NP-9057-A 0500 3636.3636 NTPC GTG-1 NT-04 NP-9056-A 0500 3636.3636 NTPC TIE-TRF-1 NT-05 NP-9054-A 0500 3636.3636 NTPC TIE-TRF-2 NT-06 NP-9055-A 2000 3636.3636 NTPC ICT-2 HV SIDE NT-07 NP-9073-A 0300 0100.0000 NTPC 11 KV SEC-A CONST. POWER NT-08 NP-9058-A 0300 0100.0000 NTPC 11 KV SEC-B CONST. POWER NT-09 NP-5808-A 2000 0060.0000 NTPC 6.6 KV E7 START-UP POWER NT-10 NP-5317-A 2000 0060.0000 NTPC 6.6 KV E8 START-UP POWER NT-11 NP-5812-A 2000 3636.3636 NTPC END OF 400 KV B'GAON (PG)-1 LNT NT-12 NP-5793-A 2000 3636.3636 NTPC END OF 400 KV B'GAON (PG)-2 METER PL-01 NP-7583-A 1000 3636.3636 PALATANA END OF SLCHAR I FDR PL-02 NP-6855-A 1000 3636.3636 PALATANA END OF SLCHAR II FDR PL-03 NP-7603-A 0800 1200.0000 PALATANA END OF UDAIPUR I FDR PL-04 NP-8381-A 0800 1200.0000 PALATANA END OF SM NAGAR FDR PL-05 NP-5799-A 0500 3636.3636 PALATANA GTG I PL-06 NP-5802-A 0500 3636.3636 PALATANA GTG II PL-07 NP-7600-A 0500 3636.3636 PALATANA STG I PL-08 NP-5801-A 0500 3636.3636 PALATANA STG II PL-09 NP-8382-A 0500 3636.3636 PALATANA ICT (HV Side) PL-10 NP-7602-A 0125 1200.0000 PALATANA ST I PL-11 NP-7584-A 0125 1200.0000 PALATANA ST II PL-12 NP-8577-A 0600 0060.0000 PALATANA BLOCK II AUX (GB COMPRESSOR) PL-13 NP-8579-A 1250 0060.0000 PALATANA BLOCK II AUX (2CA) PL-14 NP-8583-A 1250 0060.0000 PALATANA BLOCK II AUX (2CB) PL-15 NP-8573-A 0600 0060.0000 PALATANA GBC II RN-01 NP-5792-A 0500 1200.0000 RANGANADI END OF 132kV NIRJULI FDR RN-02 NP-6033-A 1000 3636.3636 RANGANADI END OF 400KV BLP-1 RN-03 NP-5817-A 1000 3636.3636 RANGANADI END OF 400KV BLP-2 RN-04 NP-5277-A 1000 1200.0000 RANGANADI GT-1 RN-05 NP-5813-A 1000 1200.0000 RANGANADI GT-2 RN-06 NP-5814-A 1000 1200.0000 RANGANADI GT-3 RN-07 NP-5276-A 0250 1200.0000 RANGANADI STN.TFR-1 RN-08 NP-5815-A 0250 1200.0000 RANGANADI STN.TFR-2 RN-09 NP-5816-A 1000 1200.0000 RANGANADI 400/132KV AUTO TFR-1 RN-10 NP-5275-A 1000 1200.0000 RANGANADI 400/132KV AUTO TFR-2 RN-11 NP-5278-A 0500 1200.0000 RANGANADI END OF 132KV ZIRO FDR RN-12 NP-7664-A 0100 0300.0000 RANGANADI END OF 33KV PARE-2 TR-01 NP-6850-A 0400 1200.0000 AGARTALA END OF AGTPP-1 FDR TR-02 NP-6851-A 0400 1200.0000 AGARTALA END OF AGTPP-2 FDR TR-03 NP-6875-A 0400 1200.0000 P'KANCHANBARI END OF K'GHAT (PG) FDR TR-04 NP-6860-A 0600 1200.0000 K'GHAT (PG) END OF P'KANCHANBARI FDR TR-05 NP-0369-A 0025 1200.0000 K'GHAT 5MVA ICT TR-06 NP-6892-B 0080 1200.0000 DHARMANAGAR END OF DULLAV FDR TR-07 NP-4137-A 0075 1200.0000 ROKHIA GT-5 TR-08 NP-4136-A 0075 1200.0000 ROKHIA GT-6 TR-09 NP-6861-A 0300 1200.0000 K'GHAT END OF AZL FEEDER TR-10 NP-6862-A 0400 1200.0000 K'GHAT (PG) END OF BDR FEEDER TR-11 NP-6863-A 0600 1200.0000 K'GHAT END OF AGTPP FDR TR-12 NP-4138-A 0300 0600.0000 BARAMURA GT-4 TR-13 NP-8471-A 0300 1200.0000 SM NAGAR END OF PALATANA TR-14 NP-8470-A 0400 1200.0000 UDAIPUR END OF PALATANA TR-15 NP-4501-A 0300 1200.0000 PK'BARI END OF 132 KV SILCHAR-1 TR-16 NP-8564-A 0300 1200.0000 PK'BARI END OF 132 KV SILCHAR-2 TR-17 NP-9076-A 0600 1200.0000 SJM'NAGAR END OF 132 KV COMILLA-1 TR-18 NP-9078-A 0600 1200.0000 SJM'NAGAR END OF 132 KV COMILLA-2 TR-19 NP-9077-A 0800 1200.0000 COMILLA END OF 132 KV SJM'NAGAR-1 TR-20 NP-9083-A 0800 1200.0000 COMILLA END OF 132 KV SJM'NAGAR-2 WR-01 NP-2657-A 1000 3636.3636 KORBA END OF KORBA-VINDYACHAL WR-02 NP-2174-A 1000 3636.3636 KORBA END OF KORBA-VINDYACHAL - II ZZ-01 NP-8374-A 0400 1200.0000 YUREMBAM END OF IMPHAL (PG)-II FDR ZZ-02 NP-6951-A 0400 1200.0000 YUREMBAM END OF KARONG FDR ZZ-03 NP-5300-A 1000 3636.3636 MISA 400/220KV ICT-1(HV SIDE) ZZ-04 NP-5289-A 0300 2000.0000 DIMAPUR (HV SIDE) 220/132kV ICT1

34

ZZ-05 NP-5282-A 1200 2000.0000 BALIPARA 400/220KV (LV) ICT ZZ-06 NP-5790-A 1000 3636.3636 BALIPARA END OF MISA FDR-1 ZZ-07 NP-5285-A 1000 3636.3636 BALIPARA END OF MISA FDR-2 ZZ-08 NP-6912-A 1200 2000.0000 BONG 400/220KV (LV) ICT ZZ-09 NP-8477-A 0600 1200.0000 KHLRT (PG) END OF BADARPUR (PG) FDR ZZ-10 NP-8662-A 0500 1200.0000 SILCHAR END OF BADARPUR (PG)-I ZZ-11 NP-8663-A 0500 1200.0000 SILCHAR END OF BADARPUR (PG)-II ZZ-12 NP-8638-A 1200 2000.0000 MISA 400/220KV ICT-2(LV SIDE) ZZ-13 NP-8669-A 0300 1200.0000 IMPHAL (PG) END Of DIMAPUR ZZ-14 NP-6936-A 0300 1200.0000 DIMAPUR (HV SIDE) 220/132KV ICT2 ZZ-15 NP-4523-A 2000 3636.3636 BONGAIGAON END OF 400 KV BALIPARA -3 ZZ-16 NP-8655-A 1000 3636.3636 BALIPARA END OF 400 KV BONGAIGAON -1 ZZ-17 NP-8653-A 1000 3636.3636 BALIPARA END OF 400 KV BONGAIGAON -2 ZZ-18 NP-8654-A 2000 3636.3636 BALIPARA END OF 400 KV BONGAIGAON -3 ZZ-19 NP-8585-A 2000 3636.3636 BALIPARA END OF 400 KV BONGAIGAON -4 ZZ-20 NP-8571-A 0500 1200.0000 SILCHAR END OF 132 KV IMPHAL-1 ZZ-21 NP-8570-A 0500 1200.0000 SILCHAR END OF 132 KV IMPHAL -2 ZZ-22 NP-4519-A 0300 1200.0000 IMPHAL (PG) END OF 132 KV SILCHAR -1 ZZ-23 NP-4504-A 0300 1200.0000 IMPHAL (PG) END OF 132 KV SILCHAR -2 ZZ-24 NP-8569-A 0500 1200.0000 SILCHAR END OF 132 KV PK'BARI-1 ZZ-25 NP-8563-A 0500 1200.0000 SILCHAR END OF 132 KV PK'BARI-2 ZZ-28 NP-4524-A 0800 2000.0000 MARIANI (PG) END OF 220 KV MOKOKCHANG-1 ZZ-29 NP-4509-A 0800 2000.0000 MARIANI (PG) END OF 220 KV MOKOKCHANG-2 ZZ-30 NP-4510-A 0800 2000.0000 MOKOKCHANG END OF 220 kV MARIANI (NEW)-1 ZZ-31 NP-4516-A 0800 2000.0000 MOKOKCHANG END OF 220 kV MARIANI (NEW)-2 ZZ-32 NP-4518-A 0150 1200.0000 220/132KV,30 MVA ICT-1 AT MOKOKCHANG LV-SIDE ZZ-33 NP-4515-A 0300 1200.0000 220/132KV,30 MVA ICT-2 AT MOKOKCHANG LV-SIDE ZZ-34 NP-4522-A 2000 3636.3636 BONGAIGAON END OF 400 KV BALIPARA-4 ZZ-35 NP-7799-A 0600 1200.0000 BADARPUR END OF 132 KV KUMARGHAT ZZ-36 NP-8799-A 0800 2000.0000 MISA END OF KATHALGURI FDR (0.01 Hz METER) ZZ-37 NP-8800-A 1000 3636.3636 SILCHAR END OF PALATANA-I (0.01 Hz METER) FICTMETERS 01 (AR-51) M10

+(AR-01) +(AR-02) -(AR-06) +(AS-55) +(KT-14) +(AS-48) +(AS-49) +(RN-01) +(AR-03) +(RN-12)

02 (AS-51) M20 +(ME-03) -(AS-02) -(AS-03) -(AS-04) +(NG-08) +(ME-01) -(AS-07) -(AS-08) -(AS-50) +(MN-06) +(AS-11) +(AS-12) -(AS-13) +(AS-31) +(AS-30) +(AS-38)*0.98 +(AS-39)*0.98 +(AS-42) -(AS-52) +(KK-01)

03 (AS-61) M19 -(AS-46)*1.0309 -(AS-47)*1.0309 -(AS-49)*1.0309 +(ER-08) +(AS-69) +(KT-15) -(AS-09) -(AS-59) +(AS-56) +(KT-16) -(AS-77) -(AS-78) -(AS-79) -(AS-80) -(AS-86) -(AS-93) -(AM-01) +(NT-07) +(NT-08)

04 (MN-51) M10 +(MN-05) +(LO-04) -(MN-03) +(MN-04) +(LO-01) +(MN-12) +(MN-10) +(MN-16) +(MN-13) +(MN-14)

05 (ME-51) M12 -(ME-01) -(ME-03) -(ME-04) -(ME-15) +(AS-50) +(AS-09) +(AS-70) +(AS-72) -(ME-02) -(ME-08) +(AS-86) -(ME-14)

06 (MZ-51) M4 +(MZ-01) +(MZ-02) -(MZ-11) -(MZ-12)

07 (NG-51) M12 +(NG-01) -(AS-12) +(MN-03) +(AS-52) +(NG-17) -(NG-20) +(DY-03) +(DY-04) +(AS-46) +(AS-47) +(NG-16) -(NG-21)

08 (TR-51) M8 -(TR-01) -(TR-02) +(TR-04) -(TR-06) +(PL-03) -(TR-13) -(TR-15) -(TR-16)

35

09 (TO-51) M8 +(AR-51) +(AS-51) +(AS-61) +(MN-51) +(ME-51) +(MZ-51) +(NG-51) +(TR-51)

10 (LO-71) M4 +(LO-01) +(LO-02) +(LO-03) +(LO-04)

11 (KD-71) M5 +(KK-01) +(kk-02) +(KK-03) +(KK-04) +(KK-22)

12 (KP-71) M5 +(KK-05) +(KK-06) +(KK-07) +(KK-08) +(KK-21)

13 (KT-71) M5 +(KT-01) +(KT-02) +(KT-14) +(KT-15) +(KT-16)

14 (AG-71) M3 +(AG-01) +(AG-02) +(AG-03)

15 (DY-71) M4 +(DY-01) +(DY-02) +(DY-03) +(DY-04)

16 (RN-71) M5 +(RN-01) +(RN-02) +(RN-03) +(RN-11) +(RN-12)

17 (PL-71) M4 +(PL-01) +(PL-02) +(PL-03) +(PL-04)

18 (TO-71) M9 +(LO-71) +(KD-71) +(KP-71) +(KT-71) +(AG-71) +(DY-71) +(RN-71) +(PL-71) +(NT-71)

19 (LO-81) M4 +(LO-05) +(LO-06) +(LO-07) -(LO-08)

20 (KD-81) M5 +(KK-11) +(KK-12) +(KK-17) -(KK-09) -(KK-19)

21 (KP-81) M5 +(KK-13) +(KK-14) +(KK-15) +(KK-16) -(KK-23) 22 (KT-81) M11

+(KT-03) +(KT-04) +(KT-05) +(KT-06) +(KT-07) +(KT-08) +(KT-09) +(KT-10) +(KT-11) -(KT-12) -(KT-13)

23 (AG-81) M3 +(AG-01) -(TR-02) +(AG-03)

24 (DY-81) M4 +(DY-06) +(DY-07) +(DY-08) -(DY-05)

25 (RN-81) M5 +(RN-04) +(RN-05) +(RN-06) -(RN-07) -(RN-08)

26 (PL-81) M6 +(PL-05) +(PL-06) +(PL-07) +(PL-08) -(PL-10) -(PL-11)

27 (TO-81) M8 +(LO-81) +(KD-81) +(KD-81) +(KT-81) +(AG-81) +(DY-81) +(RN-81) +(PL-81)

28 (LO-91) M2 +(LO-81) -(LO-71)

29 (KD-91) M2 +(KD-81) -(KD-71)

30 (KP-91) M2 +(KP-81) -(KP-71)

31 (KT-91) M2 +(KT-81) -(KT-71)

32 (AG-91) M2 +(AG-81) -(AG-71)

33 (DY-91) M2 +(DY-81) -(DY-71)

34 (RN-91) M2 +(RN-81) -(RN-71)

35 (PL-91) M2 +(PL-81) -(PL-71)

36 (TO-91) M8 +(LO-91) +(KD-91) +(KP-91) +(KT-91) +(AG-91) +(DY-91) +(RN-91) +(PL-91)

37 (LL-01) M2 +(AS-70) +(ME-12)

38 (LL-02) M2 +(AS-72) +(ME-13)

36

39 (LL-03) M2 +(RN-02) +(AS-44)

40 (LL-04) M2 +(RN-03) +(AS-45)

41 (LL-05) M2 +(AS-25) +(ER-01)

42 (LL-06) M2 +(AS-26) +(ER-02)

43 (LL-52) M2 +(AS-35) +(ZZ-06)

44 (LL-53) M2 +(AS-36) +(ZZ-07)

45 (LL-07) M2 +(AS-32) +(ER-05)

46 (LL-08) M2 +(AS-33) +(ER-03)

47 (LL-09) M2 +(AS-34) +(ER-04)

48 (LL-10) M2 +(AS-30) +(AS-16)

49 (LL-11) M2 +(AS-31) +(AS-15)

50 (LL-12) M2 +(AS-19) +(AS-42)

51 (LL-13) M2 +(AS-17) +(AS-38)

52 (LL-14) M2 +(AS-18) +(AS-39)

53 (LL-15) M2 +(AG-01) +(TR-01)

54 (LL-16) M2 +(AG-02) +(TR-02)

55 (LL-17) M2 +(AG-03) +(TR-11)

56 (LL-18) M2 +(KT-01) -(KT-01)

57 (LL-19) M2 +(KT-02) +(AS-65)

58 (LL-20) M2 +(AS-04) +(AS-37)

59 (LL-21) M2 +(KK-05) +(AS-66)

60 (LL-22) M2 +(KK-06) +(AS-67)

61 (LL-23) M2 +(KK-07) +(AS-68)

62 (LL-24) M2 +(KK-04) +(KK-08)

63 (LL-25) M2 +(KK-01) +(AS-69)

64 (LL-26) M2 +(KK-02) +(ME-10)

65 (LL-27) M2 +(KK-03) +(ME-11)

66 (LL-28) M2 +(DY-01) +(NG-14)

67 (LL-29) M2 +(DY-02) +(NG-15)

68 (LL-30) M3 +(RN-01) +(AR-03) -(AR-05)

69 (LL-31) M2 +(RN-11) +(AR-06)

70 (LL-32) M2 +(LO-02) +(MN-09)

71 (LL-33) M2 +(LO-04) +(MN-02)

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72 (LL-34) M2 +(LO-03) +(MN-10)

73 (LL-35) M2 +(MN-05) +(MN-01)

74 (LL-36) M2 +(ME-06) +(ME-02)

75 (LL-37) M2 +(ME-09) +(ME-08)

76 (LL-38) M2 +(AS-07) +(AS-22)

77 (LL-39) M2 +(NG-11) +(NG-01)

78 (LL-40) M2 +(AS-01) +(ME-03)

79 (LL-41) M2 +(AS-02) +(ME-04)

80 (LL-54) M2 +(AS-09) +(ME-07)

81 (LL-56) M2 +(AS-50) +(ME-05)

82 (LL-42) M2 +(AS-08) +(TR-06)

83 (LL-43) M2 +(TR-04) +(TR-03)

84 (LL-44) M2 +(AS-13) +(AR-04)

85 (LL-45) M2 +(MN-06) +(AS-10)

86 (LL-46) M2 +(KT-14) +(AR-07)

87 (LL-47) M2 +(NG-02) +(MN-03)

88 (LL-48) M2 +(NG-03) -(AS-12)

89 (LL-49) M2 +(KT-15) +(AS-53)

90 (LL-57) M2 +(KT-16) +(AS-74)

91 (LL-50) M2 +(AS-06) +(ME-01)

92 (LL-51) M2 +(NG-08) +(AS-63)

93 (LL-55) M2 +(KK-21) +(KK-22)

94 (LL-58) M2 +(AS-23) +(AS-23)

95 (NU-71) M4 -(NT-09) -(NT-10) -(NT-05) -(NT-08)

96 (NT-71) M6 +(NT-11) +(NT-12) -(NT-05) +(NT-07) -(NT-09) -(NT-10)

97 (BN-51) M2 +(AM-14) +(AM-23)

98 (AM-51) M2 +(AM-10) +(AM-11)

99 (NR-51) M4 -(AM-08) -(AM-22) -(AM-24) -(AM-25)

100 (SS-01) M5 +(MZ-01) +(MZ-02) +(MZ-08) +(MZ-09) +(MZ-10)

101 (SS-02) M5 -(AS-21) +(AS-22) +(AS-23) +(AS-24) -(TR-10)

102 (SS-03) M5 +(AS-25) +(AS-26) +(AS-27) +(AS-28) +(AS-29)

103 (SS-04) M7 -(AS-28) -(AS-29) +(AS-41) +(ZZ-06) +(ZZ-07) +(AS-44) +(AS-45)

104 (SS-05) M7 +(NG-09) +(NG-08) +(NG-01) +(NG-10) +(NG-14) +(NG-15) +(NG-13)

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105 (SS-06) M7 +(MN-06) +(MN-07) +(MN-08) +(MN-12) +(MN-09) +(MN-04) +(AS-21)

106 (SS-07) M5 +(ME-10) +(ME-11) +(ME-06) -(AS-24) +(ME-09)

107 (SS-08) M4 +(TR-04) +(TR-09) +(TR-10) +(TR-11)

108 (SS-09) M12 +(AS-37) +(AS-65) +(AS-38) +(AS-39) +(AS-66) +(AS-67) +(AS-68) +(AS-40) -(NG-06) -(NG-07) +(AS-70) +(AS-72)

109 (SS-10) M6 +(AS-30) +(AS-31) +(AS-32) +(AS-33) +(AS-34) +(ZZ-08)

110 (SS-11) M3 +(MN-10) +(MN-05) -(NG-10)

111 (SS-12) M4 +(AR-03) +(AR-04) -(AR-01) -(AR-02)

112 (SS-13) M3 +(AS-69) +(AS-11) -(MN-08)

113 (ER-51) M8 -(AS-25) -(AS-26) +(ER-05) -(AS-33) -(AS-34) +(ER-08) -(AS-96) -(AS-97)

3.1 Data Collection from Meters

The figure below shows a typical arrangement for collecting data from Special Energy Meters (SEM) using Data Collecting Device (DCD). The DCD is connected to the SEM through two interconnected cables:

1. Data cable 2. Optical cable

Special Energy Meter

Optical Cable

Data Cable

Data Collecting Device (DCD)

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3.1.1 Data Collection from SEM through DCD

DCD (Data Collecting Device) is used for collection of data from Special Energy

Meters. Optical port of meter is the interface between SEM and DCD for data tapping from meter memory. Optical cord is used for coupling DCD to the optical port of SEM which is circular for L&T meters and rectangular in case of Secure make SEMs. Suitable software is provided with DCD to enable data collection from SEMs and dumping the same to PC.

Optical port of SEM and DCD with connecting cords is shown in figure below.

Optical Port in SEM DCD with connecting cords There are two models of DCD:

1. The model with only numeric keys and control keys (17 keys) known as

POS296 model (PSION) – This model is already outdated and is not being discussed.

2. The model with full alphanumeric keys and control keys (45 keys) known as

XP model (Analogic). All DCD related procedures discussed in this manual pertains to analogic DCD.

For downloading data from SEM to DCD and subsequently dumping the same

from DCD to PC following procedure is carried out: 3.1.1.1 Data tapping from Meter to DCD

Step 1: Connect the AC to DC Adapter (9 Volt) to DCD / MRI (Meter Reading Instrument)

Step 2: Connect the Data cable with DCD/MRI

Data cables are of two types:

1. D-Type Cable:

Having 9-pin connectors at both ends. (The round shaped male end being connected to DCD).

2. RJ-11 Cable: Having 9-pin female connector at one end and RJ-11 (Telephone jack) at other end (connected to DCD).

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Step 3: Connect 9-pin female connector of the data cable with 9-pin male connector of the optical cord.

Step 4: Place the other end of Optical cord to the optical sensor/port of the SEM.

Step 5: DCD is switched ON by Pressing “POWER RESUME” key for few seconds. Step 6: DCD will be powered up & following menu will appear in the DCD screen

Step 7: Press “D” for collecting data from SEM. DCD will display the following message

• While making connection with DCD

• While collecting data

• After successful completion of data collection

Step 8: To come back to main menu of DCD, press “Enter”.

Step 9: Decouple the optical cord from the SEM optical port and disconnect optical

cord from the data cable. Then DCD will be with data cable only for dumping of data from DCD to PC.

3.1.1.2 Data dumping from DCD to PC by “Vincom” software for L&T meters:

Step 1: To connect DCD with local PC, plug in 9-pin female connector of the data cable to 9-pin serial port of the local PC.

Step 2: The operations should be started from Computer.

Step 3: Open “Vincom” with appropriate login ID and password.

Step 4: Select “Collect Data” option in “MRI” and following screen will appear.

Wait

Data Collected ***** Bytes Received

Press Enter

D : Collect Selected Data U : PC Communication P : Programming Mode O : Memory Status Check R : Accuracy Test

Receiving …… Preselected data

***** Bytes

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Step 5: Click on “Collect Data” option and following window will appear.

Step 6: Press “U” key in DCD for PC communication and following screen will appear in DCD display.

• While communicating PC with DCD

Waiting for Data Request

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Step 7: Enter Collector Name and click on “Collect” button. Following screen will

appear in “Vincom” software.

The data file will be saved in a sub-folder named “Data” in “Vincom” folder of the

particular directory where the software (Vincom) is installed. Data will be saved in a file with the following naming format:

yyyyMMddhhmmss.dat

where, yyyy = Year, MM = Month, dd = Date, hh = Hour,

mm = Minutes and ss = seconds

For Example, if data is downloaded on 04/06/08 at 15:30:15Hrs, it will be stored as 20080604153015.dat Note: Automatic naming of data file while downloading without asking for user defined file name is creating operational/processing problems. Matter is being taken up with L&T for rectification.

While downloading data from DCD to PC following screen will appear in DCD display

Step 8: After completion of Dumping, DCD will display

and “Vincom” will show the following screen:

Data Dumped ***** Bytes

Clearing DCD

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Step 9: Press “Enter” key in DCD to go to the main menu and click on “OK” button in “Vincom”

Step 10: Click on Close button to exit from “Vincom” and click on “Yes” option at the confirmation prompt.

Step 11: To switch off the DCD press “POWER RESUME” key for few seconds until the barline on the DCD screen is completely erased. Otherwise, DCD goes to safe mode and battery is also drained progressively.

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3.1.1.3 Data dumping from DCD to PC by “Vinplus” software for L&T meters:



Step 3: Open “Vinplus” with appropriate login ID and password.

Step 4: Select “MRI Config” option under “Configuration” menu and following screen

will appear. For first time downloading this configuration setting is necessary.

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Step 5: Click on “Select the file for editing” option and select the *.XML file from the directory “C:\Program Files\LnT\Vinplus\MRI Configuration.XML” and following window will appear.

Step 6: Click on “Data File Path” and “Result File Path” option and select the folder from the

directory “C:\Program Files\LnT\Vinplus\Convert\Done” and following window will appear.

Step 7: Select “Delete data after reading” and click on “Save” option.

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Step 8: Click on “Close” option.

Step 9: Click on “Read MRI” option under “Read Data” and separate window will appear.

Step 9: Select “Read API-II” from dropdown menu under “API Type” option.

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Step 10: Select the same configuration file from “Select Config File” from dropdown menu

under “API Type” option. Then click on “Clear Grid” option.

Step 11: Then click on “Commands” option.

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Step 12: Then separate window will appear and following meter data will transfer from DCD to

PC.

Step 13: Click on “Send” option and following window will appear.

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Step 14: After completion of data sending, click on “Close” option.

Step 15: Raw data *.MDT file will save in “C:\Program Files\LnT\Vinplus\Convert\Done”

directory. 3.1.1.4 Data dumping from DCD to PC by “Smartgrid” software for SML meters



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Step 3: Open “Smartgrid” with appropriate login id and password.

Step 4: Select “MRI Communication” option in “MRI” and following screen will appear

Step 5: Click on “MRI Communication” option in “Smartgrid” and following window

will appear on the screen.

Step 6: Press “U” key in DCD for PC communication and following screen will appear

in DCD display:

• While communicating PC with DCD

Step 7: Click on “Read MRI” option and following window will appear on the screen:

Waiting for Data Request

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Now click on “Yes” option for data dumping. The data file will be saved in a sub-folder named “Data” in “Smartgrid” folder of the

particular directory where the software (Smartgrid) is installed. Data will be saved in a file with the following naming format:

ddmmyyno.MRI

where, dd = Date, mm = month, yy = Year and

no = Two digit numeric code. For example, the first and third readings dumped to PC on 01/05/08 will be stored as 01050801.MRI and 01050803.MRI respectively. Note: Automatic naming of data file while downloading without asking for user defined file name is creating operational/processing problems. Earlier, in case of PSION type DCD, there used to be a prompt asking for user defined file name.

While downloading data from DCD to PC following screen will appear in DCD display

Step 8: After completion of Dumping, DCD will display

Step 9: Press “Enter” key in DCD to go the main menu.

Step 10: Click on Close button to exit from “Smartgrid”.

Data Dumped ***** Bytes

Clearing DCD

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Step 11: To switch off the DCD press “POWER RESUME” key for few seconds until the barline on the DCD screen is completely erased. Otherwise, DCD goes to safe mode and battery is also drained progressively.

.

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3.1.1.5 Sending Data from Metering Locations to RLDC

Step 1: Attach the appropriate *.MRI or *.dat or *.MDT file from sub-folder “Data” of “Smartgrid” or “Vincom” or “Vinplus” folder in an e-mail message.

Step 2: e-mail the message to [email protected] or [email protected].

3.1.2 Data Collection from SEM through RS-485 Scheme

RS-485 scheme facilitates automatic data downloading from all the meters in a location to a local PC. RS-485 standard is a balanced data transmission scheme with two wire connectivity (having ground). L&T make SEMs are RS-485 compatible having DATA (+), DATA (-) & GROUND terminals in its RS-485 terminal block. However, as RS-232 (serial binary data communication) is used in Computer serial ports, RS-485 to RS-232 converter is required for communication between a meter and PC. RS-232/9 pin serial port of PC is connected with RS-232 port of converter and RS-485 port of converter is connected with the RS-485 terminals of SEM.

The following connection diagram shows four meters connected in parallel to a PC using RS-485 scheme of data communication. A write up on RS-485 / RS-232 is enclosed as Annexure-I

RS 232

D +

D -

RS 232 to RS 485Converter

Substation PC

Special Energy Meter

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Terminal block of L&T make SEM showing CT, PT, RS-485 connectivity.

R Phase PT lead

B Phase CT leadY Phase CT lead

R Phase CT lead

Y Phase PT lead

B Phase PT lead

Neutral lead

RS485-Ground

RS485-DATA(-)

RS485-DATA(+)

3.1.2.1 Data Collection through RS-485

Ensure the connection arrangement of meters, converter and PC as shown in above

figure.

Step 1: Open the “Vincom” software with appropriate login ID and password.

Step 2: Select “Remote Meter” and click on “Scheduler”. Scheduler is a template to collect metered data in a predefined manner.

Normally, a scheduler contains all the meters connected to the local PC through converter. Scheduler is configured before hand by allocating unique Slave IDs to each meters and collection time.

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Step 3: After clicking on “Scheduler”, a separate window will appear. Select appropriate scheduler templates & click on “Start Scheduler” option to initiate the data collection from meters.

Metered data will be collected in a sequence as defined in the scheduler. While

collecting data from a meter, all fields against that particular meter will be displayed in blue colour on the scheduler screen. On successful data collection, the fields will turn green. Otherwise, the fields will turn from blue to red. Scheduler will temporarily skip the said meter and proceed with data collection from other meters in the list. Thereafter, scheduler will make repeated (pre-defined) attempts to collect data from the meters skipped earlier. However, if Scheduler fails to collect data of any meter even after repeated attempts, it will stop. Generally

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it can happen if a particular meter is powered off; in such a case external 63.5V single phase supply is to be provided to the meter before running scheduler for data collection.

The resultant *.DAT file will contain data of all the meters which could successfully communicate with the Scheduler.

Step 4: All metered data will create a single *.DAT file and save in “Vincom” folder of local PC by default.

Step 5: Close the window and exit from “Vincom” by Logging out.

Step 6: Attach *.DAT file and e-mail it to [email protected] or

[email protected].

3.3 Automating Meter data Collection / Transmission Special Energy Meters were installed in NER during 1995-96. For past 12 years, data

collection from meters through DCD as well as data transmission to RLDC from metering locations through internet is being carried out manually. Automating both the activities, i.e., data collection from the meter and data transmittal to RLDC would help in total elimination of manual intervention in the entire chain of activity. 3.3.1 Automatic Data collection

Implementation of RS-485 scheme would enable automatic data collection from all meters in a location to the local PC. In NER, RS-485 is in place in 400/220KV Misa substation of POWERGRID. By end of 2008, the scheme will be implemented in all NER metering locations having more than two SEMs.

3.3.2 Automatic Data Transmission

Meter data stored in PC at the metering locations can be automatically transmitted to RLDC using dedicated communication system like VSAT, OFC etc. A schematic of automatic data transmission system being implemented by ASEB is as below:

Automatic Meter Data Transmission Schematic in Assam System of NER

Metering architecture of ASEB for Intra-State ABT

Meter

DataConcentrator

DataConcentrator

Meter Meter

Ethernet Switch

Local PC Local OnlineMonitoring

Meter

Wideband communication SLDC

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In NER, the possibility of automatic data transmission utilising wideband communication network of ULDC or GSM network is being explored. As all POWERGRID substations are getting connected through WAN shortly, automatic data transmission from all POWERGRID locations could also be possible through WAN.

*************

In this section all activities have been discussed in details, sequentially, starting with

receipt of SEM data at NERLDC till sending processed meter data to NERPC for computation and issuance of weekly Unscheduled Interchange (UI) Account as well as Reactive Energy Account. Further, in the concluding part of this section, a brief on post processing activities and data archival has also been covered. 4.1 Receipt of SEM Data at RLDC

Meter data (*.mri, *.RM3*.dat and *.MDT files) downloaded at various locations of NER are electronically sent to NERLDC through e-mail. First activity pertaining to meter data begins after receipt of these data at NERLDC preferably by Tuesday of every week. The data are viewed and checked to ensure that data of every meter under the jurisdiction of a particular location have been collected as per stipulated time frame. Initially, received meter data in binary format (*.mri in case of Secure Meters and *.dat or *.MDT in case of L&T Meters) is temporarily stored in a directory for viewing / checking. Following naming format is used in case of binary files:

ddmmXXX.mri ddmmXXX.dat ddmmXXX.mdt ddmmXXX.RM3

where, ddmm is date and month of collecting data

XXX is three letter code for the location

For example, data collected at Jiribam on 05-05-2008 (Monday) is named as 0505JBM.mri. As data is to be collected on every MONDAY, ddmm naming corresponding to Monday is done even if data is collected on Tuesday for some reason. All locations are naming the files accordingly before sending. In case of aberration, proper naming is given at NERLDC on receipt. 4.2 Softwares for Data Viewing / Conversion to TEXT File

Softwares for viewing of meter data and converting Binary files to text (NPC) files are supplied by Meter manufacturers.

For Secure Meter: View1 (DOS Based) SMARTGRID

For L&T Meter: VINCOM and VINPLUS For Elster Meter: PEARL REPORTING

4.2.1 Secure Meters

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Although both View1 and SMARTGRID Softwares can be used for viewing data and

conversion of binary data to NPC format, generally viewing is done through View1, being more user friendly. Subsequently, SMARTGRID is used for conversion to NPC file. (a) View1 Software: View1 program requires that the program is present in the same location as the .mri files. In NER, *.mri files from various locations are downloaded to a particular folder named secure defined by the pathname D:\secure. Step-1: To open double click on view1. This opens the utility view1 in a DOS window along

with a small interactive message box - REVISION.

Step-2: At this interactive window press Y to continue.

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Step-3: View1 program is menu based which can be accessed using navigation and Enter keys

of the keyboard. To view the contents of a particular file select options File – Pick using the navigation keys and press Enter.

Step-4: Using the navigation keys select the desired file from the displayed list and press

Enter. The main menu screen is displayed next.

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Step-5: At the main menu select View – Mid night data and press Enter.

Step-6: The details of the selected file are now displayed on the screen. This display consists of

the following relevant parameters –

Filename : 0704AGT - mri file selected

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DCD No.: KDP004 - serial no of the DCD used for data collection Rec. No.:01 - record number for the first meter data and can include

additional records in chronological order depending on the number of meter data present in the file

Meter Serial No. : NP0302A - meter corresponding to Rec. No.

Date & Time: 8th Apr 2008 16:08hrs - date and time of data collection Security: GOOD - check result of data -GOOD or BAD Low Vol Flag : No - whether low voltage condition encountered –Yes or No Time Advanced:No - whether time advance command executed – Yes or No Time Retarded:No - whether time retard command executed – Yes or No Time Correction Count:0 - No. of occasions on which time correction

command was executed

On viewing a mri file through view1 the corresponding amr file is automatically generated in the same location, viz., D:\secure.

Step-7: Press Esc to go to main menu and select Quit – Quit. A confirmation message will appear at the bottom of the DOS screen. Enter Y to exit the view1 program.

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In case any meter data is missing the same is conveyed to the concerned person at the field accordingly for necessary action. (b) SMARTGRID Software

A folder named ddmmyy is created in D: drive and all mri files of the said date is transferred to this folder before creating NPC file. Subsequently, on conversion, NPC files corresponding to respective .mri files also reside in the same folder.

Step-1: Click on the Smartgrid icon on the desktop This will open the User Login window as shown below.

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Step-2: Log on using appropriate Name and Password And then click the OK button to open Smartgrid.

Step-3: Click on MRI Communication from MRI of main menu. This will open a small

window inside Smartgrid window. Ensure selection of following options MRI Type Analogic MRI Protocol Type SMART Protocol

Step-4: Now click on Upload MRI button to open a small navigation window. Step-5: Select all the files (*.mri) at a time from the desired location using Ctrl + A keys to

upload the selected files to Smartgrid. Then click on Open button.

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Step-6: Acknowledge the message after successful upload of all selected mri files by clicking

on OK button.

Step-7: Now close the MRI Communication window by clicking on the Close button to go back

to the main menu.

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Step-8: Click on Data on the main menu and then click on Convert in the sub-menu for

conversion of the mri files to respective NPC files.

Step-9: This will open a small window called the ASCII conversion settings. Ensure the

following options are selected, Text file type Make NPC File

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No. of characters in serial number First seven Then click on OK button to open a navigation window in the same location.

Step-10: As in Step 5 select all files at a time from the desired location using Ctrl + A keys to

create the NPC files of the selected files. Then click on Open button.

Step-11: Acknowledge [Files made successfully] message on completion of the NPC file

creation by clicking on the OK button.

Step-12: Now click on Close button to go back to the main menu.

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Step-13: Finally close the Smartgrid window. All mri and NPC files are stored in respective D:\ddmmyy folder. 4.2.2 L&T Meters

Binary files of L&T meters are in ddmmXXX.dat format and are also stored in the location D:\ddmmyy as in case of Secure Meters. Here, VINCOM is used for conversion to NPC format. 4.2.2.1 VINCOM Software

Step-1: Click on the Vincom icon on the desktop This will open the Login window as shown below.

Step-2: Login using appropriate Name and Password This will open the menu driven Vincom user interface as shown below.

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Step-3: Click on Import from Data in main menu to open a small window within Vincom.

Step-4: Use Browse button to select the desired dat file and click on Open button. Unlike

Smartgrid here only one file can be selected at a time.

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Step-5: Now click on Import button.

Step-6: On successful import a message will appear. Thereupon one can repeat Steps 4 to 5 to

import additional dat files. One can also close the import data window by clicking on Close button.

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Step-7: Click on Conversion To Text option of main menu to convert the imported file to text

file. This will open a small window named Convert To Text within the main window.

Step-8: Select the desired file based on the date and time of import of the concerned file which

appears in the drop down list of the Select Date/Time entry field. This is often very tricky as one has to keep track of the particular file according to the date and time of import. To work around this issue a file is imported and converted to text file before proceeding with import of next file.

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Step-9: Then Click on the browse folder button to open the folder/file navigation window.

Select the location where the converted text file, i.e., npc file will be saved. The file name usually ddmmXXX.npc has to be keyed in the field provided for file name. Then click on open. By default the file is saved in Vincom folder. Moreover the program does not allow over writing a pre-existing npc file. To work around this issue, it is ensured that npc file of same ddmm file does not exist.

Step-10: Now click on the Convert button to start the conversion process.

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Step-11: On successful conversion acknowledge the message by clicking OK button.

Step-12: Next click on the Close button to exit the Conversion to Text window and go to the

main menu.

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Step-13: To close Vincom click on the close button of the main menu, this will ask for a

confirmation to quit the application.

Step-14: Click on Yes to exit.

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4.2.2.2 VINPLUS Software Step-1: Click on the Vinplus icon on the desktop. This will open the Login window as shown below.

Step-2: Login using appropriate Name and Password This will open the menu driven Vinplus user interface as shown below. Step-3: Click on “Ascii Convert” from “ASCII” in main menu to open a small window within

Vinplus.

Step-4: Click on “Source Path” to select the source folder where all raw data (*.mdt) files will be available.

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Step-5: Click on “Destination Path” to select the result folder where all text data (*.npc) files will be stored.

It is to be noted that Source file and destination file should not be same folder. Step-6: Click on “Convert to Ascii” in that separate window.

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Step-7: After Ascii conversion following window will appear and click on “Ok” option which will appear in a small separate window.

Step-8: Click on “Exit” option.

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Step-9: Close the application simply click on “Close” button.

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4.2.3 Structure of NPC File

Now that *.NPC files for both Secure and L&T meters have been prepared, let us discuss the structure and contents of the .NPC file for better understanding of the basics before subsequent data processing. Each .mri/.dat/.mdt file has its corresponding .NPC file.

The general structure and organization of a typical .NPC file is reproduced below.

The line WEEK FROM 0000 HRS OF 07-04-08 TO 1238 HRS OF 16-04-08 implies that file contains data from 0000 Hrs of 7th Apr’08 to 1230 Hrs of 16th Apr’08, i.e., the last 15 min block data of 16th Apr’08 at the time of data collection which is 1238 Hrs of 16th Apr’08.

The next line NP-0302-A 67124.5 44891.9 97902.9 07-04-08 contains following

information – 1. Meter Serial No (NP-0302-A) – wherein NP stands for National Power Transmission

Corporation the former name of Powergrid Corporation of India Limited followed by a 4-digit meter serial number and finally an alpha code (A or B) to indicate secondary CT current (A for 1 ampere and B for 5 ampere).

2. MidNight Net Wh (67124.5) - This is a cumulative register reading which indicates

the initial Net active energy in Wh at the beginning of the day. This cumulative register records Net active energy in Wh on daily basis.

3. Reactive High Energy (44891.9) 4. Reactive Low Energy (97902.9) There are two cumulative registers which record the reactive energy (VARh) exchange

on daily basis under high and low voltage conditions, i.e., when RMS voltage is >=103%Vn and when RMS volage is <97%Vn but >70%Vn

Cumulative net Wh, net VARh for voltage high and voltage low condition at each midnight is recorded in 5 main digits and 1 decimal digit. These figures are always positive and cycles from 0 to 99999.9 in forward or backward direction depending on energy export or import.

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5. Date (07-04-08) – This indicates that the 6 Rows X 16 Columns arrangement of data pertains to this date.

Next is the blockwise data arranged as 16 block data in each row and total 6 rows for complete 24 hours (96 time blocks of 15 min each) data with the following format: StartingHour AvgFreq StatusIndication NetEnergy AvgFreq StatusIndication NetEnergy....

StartingHour indicates the time in hour at the beginning of each of the 6 rows. AvgFreq (average frequency) is recorded for every 15 min block as a 2-digit code ( 0 to 99) and is computed based on the no. of voltage cycles in one 15 min block divided by (15*60=900). Computation of average frequency is done only for the period during which the VT supply was available in the 15 min block under consideration. The frequency data is available for each successive 15 min block in encoded form as (Average frequency – 49.5)*100 and neglecting decimals. When frequency is <=49.5 it is recorded as 0 and when the frequency is >=50.49 it is recorded as 99. The actual frequency corresponding to two consecutive codes differ by 0.01Hz.

StatusIndication may be either ‘*’ to indicate supply down or supply failure which might be momentary or might have lasted for several blocks Or ‘rr’ to indicate time retardation undergone Or ‘aa’ to indicate time advance undergone. Finally sum of net energies (96 blocks) is given at the end of last row of the day having complete 24 hours data.

Advance/Retard RTC command : Using these commands, 6 consecutive 15 min time blocks are contracted/elongated by 10 seconds each (with the first 15 min block being the closest 15 min block from the time of keying in the RTC command). Moreover once advance/retard RTC command is given, a lock-out of seven days sets in which implies that the next RTC command can be given only after seven days of the earlier RTC command. This implies that only 1 min time correction can be executed over a week. There is ‘aa’ or ‘rr’ indication stamped against the corresponding 15 min time blocks for which advance or retard RTC was executed. A ‘*’ indication implies power failure in the corresponding 15 min block or RMS voltage in any or all phases was <70%Vn for at least 3 secs.

NetEnergy (active energy) is recorded by the meters in Wh for every 15 min based on the average active energy exchange for the time block considered. Net Wh data is available for each successive 15 min time block up to second decimal with plus/minus sign corresponding to energy export/import. 4.3 Appending Text Files

Now that there are multiple npc files, it is desirable, for better file management, that these files are combined into one single large file. For this an utility program “APPEND” is used which compiles all individual .NPC files into a regional .NPC file named ddmmSREA.NPC. The “APPEND” utility considers only those files which has the same ddmm prefix to the filenames as prompted while running “APPEND”.

The appended file contains the complete meter data of the region for the relevant period

in text form and is used in all subsequent processing. The APPEND program is required to be copied to the concerned ddmmyy folder as the program appends all the relevant files present in the folder in which the APPEND program is also resident.

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Step-1: Double click on APPEND to open a DOS screen as shown below.

Step-2: Enter 2-digit figure for day, i.e., dd. Press Enter. Step-3: Enter 2-digit number for month, i.e., mm. Press Enter to start the append operation. The above illustration assumes appending files for 7th Apr 2008.

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After completion, a message FILES are appended successfully appears.

Step-4: To exit the program, press Esc. The regional npc file (ddmmSREA.NPC) is now created in the ddmmyy folder.

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4.4 Processing of SEM Data / Computation of Net Injection & Drawal

This section describes the procedures and steps involved in computation of drawals by the states, injection by ISGSs, TieLine exchange between NER and ER, etc to mention a few. Some additional files, called check files, are also created to facilitate troubleshooting, internal analysis and database creation. The resultant energy figures are further validated through an elaborate process of Data checking and validation to ensure that the UI and Reactive energy Accounts issued by RPC are accurate and acceptable to the stakeholders. 4.4.1 Computation of Drawal / Injection from meter data

At present, a DOS based software developed by SRLDC named rea2006 is used for SEM data processing and computation. The executable file is kept in the location D:\SEMAZE1. The appended NPC file has to be copied in the same location for data processing. The appended text file “ddmmSREA.NPC” is used for meter data processing to calculate the actual figures pertaining to State Drawal and ISGS Generation and ER-NER Tieline flow. Step-1: From the location D:\ddmmyy Copy the regional .NPC file, “ddmmSREA.NPC” to

D:\SEMAZE1.

Step-2: Paste the file in “D:\SEMAZE1” folder.

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The executable file rea2006 is also present in the same location, D:\SEMAZE1.

Step-3: Open “rea2006” from “D:\SEMAZE1” folder and follow the steps as given below:

a) Click “DATA CORRECTNESS” under “INIT” option of main menu for checking the data formats. This option creates a new file named “ddmmSREA.CHK” which can be used for checking the data structure if required.

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Key in the filename (ddmmSREA.NPC) when prompted and press Enter. b) Next click “CREATE DATA BASE” under “INIT” option of main menu for

creating date wise Folders. As in Step (a), key in ddmmSREA.NPC at the cursor prompt and press Enter.

c) Next click “DATA NOT RECEIVED” for viewing “ddmmSREA.NRX” file which

lists the meters whose readings are not available in the particular “ddmmSREA.NPC” file processed. This helps to decide whether any back-up meters are to be used as main meter data is not available. Here too, as in the previous steps, ddmmSREA.NPC is required to be entered at the cursor prompt. Press Enter to continue.

d) Next click on “COMPUTE” option of main menu and open ”COMPUTE ENERGY”

for preparing “*.NPD” and “*.MWH” files for all meters which gets stored in respective date wise folders in “D:\SEMBASE”. Here a listbox displaying all meters as per location ID and Meter No appears on the left halve of the screen. Press Ctrl + A to select all items of the listbox at a time and press Enter. This will open another listbox of dates on the right halve of the screen besides the first listbox. Select the dates for which data processing is to be performed. MASTER Frequency Meter: One Special Energy Meter is chosen as Master frequency meter and frequency code recorded by that meter is used for all calculations. At present one SEM at Korba in WR (NP-2645-A) is used as master frequency meter in NR-ER-NER-WR (NEW) Grid and data of this meter is sent to all RLDCs by WRLDC. Details of master frequency meter are stored in FRQMASTER.DAT file. If in any particular week/day, Korba meter (NP-2645-A) reading is erroneous or missing or incorrect then use Durgapur meter (NP-6460-A Or NP-6461-A) reading and in such case edit “FRQMASTER.DAT” file in “D:\SEMAZE1” folder to take appropriate meter as the master frequency meter for capturing frequency data.

e) Afterwards click “COMPUTE FICTMTRS” for calculating Constituents drawal

/injection as per fictitious meter configurations and create “*.MWH” for all the fictitious meters which gets stored in respective date wise folder in “D:\SEMBASE”. As in the previous step, under this option also, a listbox displaying all pre-defined fictitious meters appears. Select all items on the listbox at a time using Ctrl+A and press Enter. This will open another listbox to the right of the earlier listbox. Select the desired dates as in previous step. Press Enter to continue.

f) Finally go to “ACCOUNT” option of main menu and click “MWH OUTPUT” for calculating MWH drawal/injection for all configured “*MWH.CFG” files. These output files are stored in “D:\SEMBASE\MWH” as ddmmyy.XXX where XXX signifies the 3 character name of the beneficiary. At this option, like earlier steps, select all items on the left listbox and the dates from the right listbox and press Enter to continue. Note: Dates selected in Steps (d), (e) and (f) must be identical and same.

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If any meter is replaced by its corresponding other end meter (or by some other combination of meters) as per “MASTER.DAT”, the same must be reflected in both “*_MWH.CFG” as well as “FICTMTRS.CFG” files of “D:\SEMAZE1” folder.

g) Next go to “MVARH OUTPUT” for calculating MVARH for all the configured

“*MVAR.CFG” files which gets stored in “D:\SEMBASE\Mvarh”. From the listbox on the left select the items “STATES” and “INTER” and press Enter. This will open a second listbox to the right of the earlier listbox. Select the desired dates consistent with the dates selected in earlier steps and press Enter to continue. At any menu or options window, press Esc to come out from the active screen to the previous screen.

h) To exit the rea2006 program, press Esc at the main menu window and enter Y when

asked for confirmation.

After successful completion of rea2006, a number of output files are created and stored in their respective locations as already mentioned above. Being text files, these output files are readily recognized by Windows operative system. The MWh output files are created one for each day with 96 rows of data against multiple columns (each column has a self explanatory heading). The MVARh output files created through Step 3(g) are however different in the sense that these files have seven rows of data each row depicting the cumulative VAR data for one day.

All MWh & MVARh output files are stored in the folder D:\SEMBASE\MWH & D:\SEMBASE\MVARH respectively, as already mentioned earlier.

Output MWh files pertaining to States’ Drawal, ISGSs’ Injection and ER-NER Tieline flow are created. These files are as follows:

1. ddmmyy.ARP – Feeder wise drawal of Arunachal Pradesh 2. ddmmyy.ASM – Feeder wise drawal of Assam 3. ddmmyy.MAN – Feeder wise drawal of Manipur 4. ddmmyy.MEG – Feeder wise drawal of Meghalaya 5. ddmmyy.MIZ – Feeder wise drawal of Mizoram 6. ddmmyy.NAG – Feeder wise drawal of Nagaland 7. ddmmyy.TRI – Feeder wise drawal of Tripura 8. ddmmyy.IDY – Feeder wise injection of Doyang HEP 9. ddmmyy.IKD – Feeder wise injection of Khandong & Kopili-2 HEP 10. ddmmyy.IKP – Feeder wise injection of Kopili HEP 11. ddmmyy.IKT – Feeder wise injection of AGBPP, Kathalguri 12. ddmmyy.ILK – Feeder wise injection of Loktak HEP 13. ddmmyy.IRC – Feeder wise injection of AGTPP, R C Nagar 14. ddmmyy.IRN – Feeder wise injection of Ranganadi HEP 15. ddmmyy.ERI – Feeder wise energy exchange through ER-NER Tielines

In addition, one more MWh output file, ddmmyy.UI_, is also created which can be

considered as NER Summary file and consists of columns for data pertaining to Drawal by each State, Total StateDrawal, Generation by every ISGS, Total NER Generation, Net ER-NER Tie line flow and Transmission loss.

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For example, if one executes rea2006 for 04-05-2008, then the output file 040508.IRC created for an ISGS Station AGTPP, R. C. Nagar showing its injection will have the following structure:

The file shows net injection through three outgoing EHV feeders and total injection in MWh during each 15 min. time block as well as total figure for the day against the relevant columns.

Similarly, the output file 040508.TRI created for Tripura showing its drawal will have

the following structure:

Here it can be seen that the file shows net drawal through four EHV feeders and total

drawal in MWh during each 15 min. time block as well as total figure for the day against the relevant columns.

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Likewise, other output files are also created. 4.4.2 Data checking and validation

Before proceeding further it is very important to carry out data checking and validation. Through this process it can be established whether the SEMs are recording data correctly. This is done by manual check of few additional files called check files created through rea2006. These check files are all MWh output files and are stored in the folder D:\SEMBASE\MWH in the ddmmyy.XXX format. In case of any discrepancies observed, corrective action has to be taken, like say, intimation to concerned agency for replacement of meters, use of alternate meters for computation of energy in case main meter is showing incorrect data, etc. The check files are:

1. Net bus check of substations- ddmmyy.NSS This file contains the summary of the net bus of all important substations. In case net bus figure of one or more sub-station shows a wide variation than normal then net bus file pertaining to the individual station can be examined. The file extensions are appropriately coded to give an indication of the sub-station like NBG (Bongaigaon), NBP(Balipara), NMS(Misa) and so on.

A typical file 040508.NSS for net bus check of substations for 04-05-2008 is reproduced

below. This file has data arranged in 96 rows for every 15 min block of the day and columns indicate the net bus figure of the substation, say, Aizawl, Badarpur, etc.

For better understanding and troubleshooting, a further detail of a particular substation is available in another file, say, 040508.NAZ pertaining to net bus of Aizawl substation. The file is reproduced below.

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Similarly, details of other substations can be examined through their respective net bus

check files. 2. Net bus check of generators- ddmmyy.NGN

This file is a summary of the net bus of all ISGSs. In case any discrepancy is observed against one or more ISGS, the same is further investigated through the net bus file of the concerned ISGS say NLK (Loktak), NKT(Kathalguri) and so on.

The file 040508.NGN for net bus check of ISGSs for 04-05-2008 is reproduced here.

Further details of any particular ISGS, say, Kopili for 04-05-2008 is also available in the

file 040508.NKP for examining the net bus details of Kopili. The file is reproduced herein.

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The additional columns on the right which are not visible in the above screenshot have

been reproduced below in continuation to the above for proper understanding.

3. End1-End2 (pair) check- ddmmyy.LL1, .LL2, .LL4, .LL5,…, .LL9 These file are created to facilitate pair check of back to back meters connected across the transmission lines. The first two files LL1 and LL2 are summary files depicting the difference in readings of End1 SEM and End2 SEM (computed loss) of important lines. The corresponding End1 and End2 meter readings along with the difference are present in other LL files from LL4 to LL9.

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The file 040508.LL2 is reproduced here showing 96 block data for 04-05-2008 pertaining to difference between End1 and End2 meter readings for the transmission lines as mentioned against respective column headings.

Now to examine the End1-End2 meter readings along with the difference for the line,

say, 132KV Doyang-Dimapur I & II on 04-05-2008, we have to open the file 040508.LL7. The file is as reproduced below showing the 96 block data pertaining to 132KV Doyang-Dimapur-I and 132KV Doyang-Dimapur-II.

Identification of any metering error can be done through the three broad categories of check files as explained.

(a) Net Bus of Sub-Stations

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(b) Net bus of Generating Stations and (c) Pair check (End1 – End2 of lines) 4.5 Finally Implemented Schedule

Though the schedules are prepared on day-ahead basis, i.e, one day before the day of operation, it is always expected that on the day of operation the schedule will undergo multiple revisions on account of various operational considerations. Finally, at the end of the day’s operation, the last revised schedule is in fact the final operational schedule for that day. This schedule is further reconciled (if required) with all the beneficiaries of the region and adjoining region, viz., ER to arrive at a dispute free schedule as regards ISGS injection, States Drawal and Inter-regional Tieline - technically referred to as Implemented Schedule.

As described in the preceding section, all actual figures pertaining to Drawal, and Injection have been calculated from the meter data. Now in order to compute the unscheduled Interchange (UI) it is required that implemented schedules for the corresponding days are also available. The Schedule files are created, revised and stored in the Scheduling console kept in the Control Room of NERLDC. Meter data processing and UI computation are carried out on a different computer in Market Operation (MO) department.

The last revised finally implemented schedules of the relevant period are copied from Control Room PC to MO Department PC and further processed to achieve the following:

(a) Renaming to a common format (ddmm-Final) (b) Extracting the data/information which are required for accounting purpose

like - DC / MAC / Net Injection Schedule of ISGSs - Net Drawal Schedule of States - Net Schedule of Inter Regional Links

A number of customized routines (MACRO) have been developed to carry out the entire chain of activities from import of Finally Implemented Schedules to computation of UI. The MACROs are written in Visual Basic and executed on MS-Excel platform. These routines have been developed to minimize human errors normally encountered in repetitive type of activities. These macros are present in an excel file, E:/All_Macro wef ddmmyyyy.xls and are modified from time to time based on need.

For the purpose of submission of implemented schedules to RPC the following sequence of activities are carried out: Step-1: Copy the last revised schedule from Scheduling PC of Control Room

(\\ia0co1\SCHEDULING and COMMERCIAL\SCHEDULE\sch yyyy\MMMyyyy) to nelcomml-1 PC (E:\C-Manipur\SCHEDULE\As implemented\Mmmyyyy\temp).

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Now go to E:/C-Manipur/SCHEDULE/As implemented/Mmmyyyy/temp)

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Step-2: Rename the last revised schedule using RENAME LAST REVISED SCHEDULES (E:/ All_Macro wef ddmmyyyy.xls). This retains only “ddmm-dlysch” portion for all the desired files selected through the macro.

Step-3: Using “All_Macro wef 31032008” prepare final Implemented Schedules “ddmm-

Final”. Use “MACRO FOR PREPARATION OF FINAL SCHEDULE” button & click on “START” button. Proceed as per instructions.

4.6 Sending Data to RPC

Data pertaining to SEM and schedules of the relevant week are required by NERPC in order to issue weekly bills for UI energy and Reactive energy. The data are compiled in a CD and has the following folders/contents:

1. Daily Schedule This folder contains daily final implemented schedule files – ddmm-Final.xls 2. Constituents Drawal This folder contains daily (15 minute time block wise) computed drawal files of all

the states of NER – ddmm.XXX where XXX is a 3-character code of the state, like ASM for Assam, ARP for Arunachal Pradesh and so on.

3. ISGS_Injection This folder contains daily (15 minute time block wise) computed injection files of all

the ISGSs of NER – ddmm.YYY where YYY is a 3-character code of the generating station, like IDY for Doyang, IKT for Kathalguri and so on.

4. ER-NER Exchange This folder contains daily (15 minute time block wise) computed power flow files

concerning ER-NER inter regional links – ddmm.ERI. 5. SEM_Data This folder contains processed sem data (NPxxxxA.MWH / NPxxxxB.MWH files)

arranged in date wise folders, regional NPC file (created by appending individual NPC files) which is a compilation of all meter data available at NERLDC for the period concerned, discrepancies file mentioning relevant deviations (if any) to be considered during computation and the MASTER.DAT file which is a detailed list of all SEMs (location IDs, meter no., CT / PT ratio and feeder where the meters are installed) in NER.

The CD is self sufficient to independently carry out the necessary activities and prepare

the relevant weekly accounts, viz., UI and Reactive energy accounts.

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Step-1: Processed SEM data is required by NERPC for issuance of weekly UI energy bill and Reactive Energy Bill. Compile all relevant data for NERPC using “MACRO FOR COMPILATION OF NEREB DATA” of “AllMacro” sheet and proceed as per instruction. This creates a folder in “D:\SEM_Scheduling_Data” named “Mmm_yy_Week_ddmm-ddmm”.

Step-2: Edit “discrepancies” file in “D:\SEM_Scheduling_Data\Mmm_yy_Week_ddmm-ddmm1\SEM_Data” folder to intimate NERPC regarding any deviation adopted for UI computation for the particular week. Mention LT feeder assumptions to be considered.

Step-3: Burn the data onto a CD and send the same to NERPC.

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4.7 Post Processing & Data Archival 4.7.1 Post Processing Activities

1. Data to POSOCO/NLDC Abstract of weekly data pertaining to schedules and SEM reading are also required by various departments. In this context the file “NER-SCH-ACT-SO” is sent to SO department file by email. (e-mail ID: [email protected] and [email protected]).

2. Estimated Loss for Scheduling Moreover, weekly transmission loss figure in percentage available in the worksheet “week-loss” of “weekly_ui_ddmmDDMM_yy” file is noted and corresponding entry of the same is made in the designated register book (LOSS) kept in Control Room. This is used as estimated transmission loss for scheduling in the following week.

3. Actual injection and drawal by NER Constituents : Actual injection by ISGS and drawal by NER states daily blockwise are also required to NLDC on monthly basis. The worksheet “week-loss” of “weekly_ui_ddmmDDMM_yy” file is to be accumulated together for one month and is sent to NLDC by e-mail. (e-mail ID: [email protected] and [email protected]).

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4. Postings on Website (www.nerldc.org)

Each RLDC maintains a website for public access of pertinent data. In this connection the following data are regularly uploaded on the website of NERLDC:

1. Weekly Schedule vs Actual Figures – Weekly data regarding schedule vs actual for allthe constituents are compiled and uploaded on the website.

2. Monthly Power Position – Monthly data regarding Availability, Schedule and Actualconcerning the ISGSs in the region are compiled after the end of every month and posted on the web for public viewing.

4. Monthly Frequency Profile – Daily 15 min. time block frequency data for thecomplete month is compiled uploaded for public access.

5. Estimated transmission loss - The estimated transmission loss figure is to bereflected in NERLDC website.

5. Data to NLDC from NERLDC for Reports

NLDC prepares various reports - weekly / monthly / quarterly and yearly, after compilation and analysis of data collected from various sources. In this context, commercial section provides requisite data related to drawal/injection - both scheduled and actual as well as scheduled bilateral transactions on monthly basis.

4.7.2 Data Archival

All data pertaining to SEM reading are sent from various locations and are very vital from commercial viewpoint. So these data are systematically archived for future reference in case the need arises.

All the *.MRI, *.AMR, *.MDT, *.NPC & *.DAT file are stored in respective D:\ddmmyy folder as indicated in Section 4.2. Also, all the raw data are stored in their particular location folders available in “D:\NERLDC\Mmmyyyy”.

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The screenshot shows the archived files pertaining to NEEPCO for May2008.

The following table shows the archival details of vital files pertaining to meter data:

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Archived files Main Back-up 1st Stage Back-up 2nd Stage Raw meter data nelcomml-8 PC nelcomml-4 PC EXTERNAL HD Text(.NPC) files nelcomml-8 PC nelcomml-4 PC EXTERNAL HD Net Injection/ Drawal files nelcomml-8 PC nelcomml-4 PC EXTERNAL HD Implemented schedules nelcomml-8 PC nelcomml-4 PC EXTERNAL HD Weekly account nelcomml-8 PC nelcomml-4 PC EXTERNAL HD Monthly summary nelcomml-8 PC nelcomml-4 PC EXTERNAL HD RPC data nelcomml-8 PC nelcomml-4 PC EXTERNAL HD Daily UI graph nelcomml-8 PC nelcomml-4 PC EXTERNAL HD

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Annexure-1

Write-up on RS-232 and RS-485 Standards

RS-232 STANDARD • RS-232 - serial binary data communication between a DTE (Data terminal

equipment) and a DCE (Data Circuit-terminating Equipment). • Used extensively in computer serial ports. • ITU-T standard is V.24.

Voltage levels

• The standard specifies a maximum open-circuit voltage of 25 V, however signal levels of ±5 V,±10 V,±12 V, and ±15 V are all commonly seen.

• Logic one is defined as a negative voltage. • Logic zero is positive voltage.

Slew Rate The slew rate, or how fast the signal changes between levels, is a vital specification which tends to limit the communication rate.

Time

V O L T A G E

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3-wire and 5-wire RS-232 A minimal 3-wire RS-232 connection consist only of transmit data, receive data and ground when the full facilities of RS-232 are not required. When only flow control is required, the RTS and CTS lines are added in a 5-wire version. LIMITATION OF RS-232

• Single-ended signaling referred to a common signal ground limits the noise immunity and transmission distance.

• Multi-drop (connection between more than two devices) operation of an RS-232

compatible interface is not defined; while multi-drop "work-arounds" have been devised, they have limitations in speed and compatibility.

RS-485 STANDARD

• The RS-485 standard is a balanced data-transmission scheme. ANSI TIA/EIA-485. • Communication over long distances and noisy environments. • OSI model physical layer electrical specification:

*2-wire+Ground, *Half-duplex, *Multipoint Serial Connection.

Half-Duplex Full-Duplex

• The standard specifies a differential form of signaling.

Waveform example RS-485 itself does not specify formatting of bytes, format of RS-232 is normally used.

http://en.wikipedia.org/wiki/Image:FullDuplex.JPG

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Noise in straight and twisted pair cables

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RS-232 RS-485 Differential no yes

Max number of drivers Max number of receivers

1 1

32 32

Modes of operation half or full duplex half duplex

Network topology point-to-point multipoint Max distance (acc. standard) 15 m 1200 m

Max speed at 12 m Max speed at 1200 m

20 kbs (1 kbs)

35 Mbs 100 kbs

Max slew rate 30 V/μs n/a

Receiver input resistance 3.7 kΩ ≧ 12 kΩ Driver load impedance 3.7 kΩ 54 Ω

Receiver input sensitivity ±3 V ±200 mV Receiver input range ±15 V –7.12 V

Max driver output voltage ±25 V –7.12 V

Min driver output voltage (with load) ±5 V ±1.5 V L&T Meter connected in Misa Control Room Panel showing

• Meter Serial Number : NP-5301-A • 3 phase 4 wire PT connection • 3 phase CT connection • RS-485 wiring

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Lead wires with Temporary Power supply

RS-485 TO RS-232 Converter

63.5 V supply leads from temporary Power supply arrangement

RS-232 PORT of PC

RS-485 TB

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Screen shot of a Scheduler presently used in Misa S/s

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