Srldc Data

8/15/2019 Srldc Data

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SOUTHERN REGIONAL LOAD DESPATCH CENTER

POWERGRID, BANGALORE

Data Acquisition &

CommunicationAbhimanyu Gartia

Chief Manager,SCADA-IT

SRLDC


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Instrumentation For SCADA Instrumentation For SCADA

TransducersTransducers RTURTU

Current TransformerCurrent Transformer Capacitor Voltage TransformerCapacitor Voltage Transformer


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TRANSDUCER TRANSDUCER

Device converts one form of energy to another form.Device converts one form of energy to another form. Energy form viz. electrical, mechanical, chemical etc.Energy form viz. electrical, mechanical, chemical etc.

Transforms High level to Low levelTransforms High level to Low level

InputInput –– Hundreds of voltHundreds of volt

OutputOutput –– FewFew milliamperesmilliamperes

Measures field parameters like voltage, frequency,Measures field parameters like voltage, frequency,current, 3 phase bi directional active & reactive powercurrent, 3 phase bi directional active & reactive power

and transformer tap positionand transformer tap position Accuracy : +/ Accuracy : +/-- 0.2% class for frequency transducers and0.2% class for frequency transducers and

+/+/-- 0.5% class for other transducers0.5% class for other transducers


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R R emoteemote T Terminalerminal UUnitnit

The RTU performs the data acquisition and supervisoryThe RTU performs the data acquisition and supervisorycontrol over the substation for the SCADA system.control over the substation for the SCADA system.

As a minimum, the RTU collects, processes and As a minimum, the RTU collects, processes andtransmits the data from the substation to the controltransmits the data from the substation to the control--centers.centers.

The following data are generally acquired from the subThe following data are generally acquired from the sub--station:station:--

Analog Analog -- Power, Reactive Power, Voltage, Frequency,Power, Reactive Power, Voltage, Frequency,Current.Current.

Digita Digita l l -- Circuit Breaker Status, IsolatorCircuit Breaker Status, Isolator Status,SOEsStatus,SOEs The RTU also receives and processes digital and analogThe RTU also receives and processes digital and analog

commands.commands.


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RTU: MAIN FUNCTIONSRTU: MAIN FUNCTIONS

SCADASCADA Local ControlLocal Control

Data LoggingData Logging Process ControlProcess Control


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HARDWARE CONNECTIVITY DIAGRAM FOR SCADA ATHARDWARE CONNECTIVITY DIAGRAM FOR SCADA AT

SUBSTATION / GEN.STATIONSUBSTATION / GEN.STATION

MAIN

CPU

BOARD

PSU

COMMN

BOARD

A

NA

L

O

G

I / P

D

IG

T

A

L

I / P

C

ON

T

R

O

LO/P

TERMINAL

BLOCK

TERMINAL

BLOCK

TERMINAL

BLOCK

REMOTE TERMINAL UNIT

TRANSDUCER O/P TERMINAL

MVAR VOLTMW

TRANSDUCER I/P TERMINAL P T

SEC

110VAC

CT SEC

1 AMPS

F

R

O

M

S

W

I

T

CH

Y

A

R

D

-

F

I

E

L

D

EVENT LOGGER

PANEL

D

R

I

V

E

R

R

E

L

A

Y

TRANSDUCER PANEL

RS232 PORT


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SCADA HARDWARE CONNECTIVITY WITH COMMUNICATIONSCADA HARDWARE CONNECTIVITY WITH COMMUNICATION

SYSTEM(PLCC) AT SUBSYSTEM(PLCC) AT SUB--STN/GEN STSTN/GEN ST

RTU

N

S

K

5

modem

PLCC T x / R xSPEECH / DATA

PANEL

RS 232 CONNECTIVITY

PLCC

INDOOR EQUIMENT


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TRANSDUCERS TRANSDUCERS

CLASSIFICATIONCLASSIFICATION SELF POWERED/AUXILARY POWEREDSELF POWERED/AUXILARY POWERED

INPUTINPUT

VOLTAGE/CURRENT/POWER/POSITION VOLTAGE/CURRENT/POWER/POSITION OUTPUTOUTPUT

00--10mA, 410mA, 4--20mA, 020mA, 0--5mA 05mA 0--5v,05v,0--10v10v

OUTPUT IMPEDANCEOUTPUT IMPEDANCE 500500ΩΩ,1000,1000ΩΩ,2000,2000ΩΩ

ACCURACY ACCURACY

0.2 CLASS, 0.5 CLASS, CLASS 2 AND ABOVE0.2 CLASS, 0.5 CLASS, CLASS 2 AND ABOVE


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A/D CONVERSION AT RTU LEVEL A/D CONVERSION AT RTU LEVEL(16 BIT ADC).(16 BIT ADC).

FOR MW / MVAR TRANSDUCER:

INPUT: PT SEC PHASE TO PHASE : 110VAC

CT SEC TWO PHASE CURRENT (R & B): 1 AMPS.

OUTPUT : 4 – 20mA(TRANSDUCER OUTPUT)

IN ADC:

AT 4mA = 6553 Count

AT 20mA = 32767 Count

12mA IS THE CENTRE POINT.

(+/- 0.1% IS THE ACCEPTABLE RANGE OF ERROR ON FULL SCALE)

( Ref Calculation Sheet for all type of Measurand)


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TRANSDUCERS TRANSDUCERS

Measures field parameters like voltage,Measures field parameters like voltage,frequency, current, 3 phase bi directional activefrequency, current, 3 phase bi directional active& reactive power and transformer tap position.& reactive power and transformer tap position.

RatingRating Vol Vol: 110/115 volts phase to phase: 110/115 volts phase to phase

Current : 1 ACurrent : 1 A

Frequency: 45Frequency: 45--55 Hz55 Hz

Output : 4Output : 4 –– 20 ma / 500 ohms20 ma / 500 ohms

External power supplyExternal power supply

IEC 688IEC 688

Accuracy : +/ Accuracy : +/-- 0.2% class for frequency0.2% class for frequencytransducers and +/transducers and +/-- 0.5% class for other0.5% class for othertransducerstransducers


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SALIENT FEATURES OF ULDC RTUSALIENT FEATURES OF ULDC RTU A small rugged computer A small rugged computer CPU, volatile & nonCPU, volatile & non--volatile memory, power supplyvolatile memory, power supply

module, I/O modulemodule, I/O module

Communication ports & maintenance portsCommunication ports & maintenance ports

Allows the central SCADA master to communicate with Allows the central SCADA master to communicate withthe field devicesthe field devices

Acquires the data from the field devices/equipment and Acquires the data from the field devices/equipment andtransfers the data to the SCADA systemtransfers the data to the SCADA system

Distributed Processing TechnologyDistributed Processing Technology Main processor is 32Main processor is 32--Bit 16Mhz and sub modules are 8Bit 16Mhz and sub modules are 8--

bit.bit.

Real time clock Real time clock

Access via PC Access via PC--Based Configuration.Based Configuration. Password Protected.Password Protected.

Database configured via a PC and can be downloadedDatabase configured via a PC and can be downloaded


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SALIENT FEATURES OF ULDC RTUSALIENT FEATURES OF ULDC RTU

Switch mode converter power supply module whichSwitch mode converter power supply module whichprovides power for mother board, VME cards, I/O modulesprovides power for mother board, VME cards, I/O modulesand peripherals. Input voltageand peripherals. Input voltage –– 241 V AC, 50 Hz.241 V AC, 50 Hz. OutpitOutpitvoltage +/voltage +/--5V DC, +/5V DC, +/-- 12 V DC, +/12 V DC, +/-- 24 V DC24 V DC

32 Analog inputs per module ,15 bit resolution .32 Analog inputs per module ,15 bit resolution . Conversion rate 660 ns for all 32 inputs.Conversion rate 660 ns for all 32 inputs.

64 status inputs per status module,1ms scan time for 6464 status inputs per status module,1ms scan time for 64inputs,1ms SOE resolution. A simple status input/SOEinputs,1ms SOE resolution. A simple status input/SOEinput/accumulator input can be connected. LED indicatorsinput/accumulator input can be connected. LED indicatorsfor each input. Contact wetting voltage supplied by powerfor each input. Contact wetting voltage supplied by powersupply module.supply module.

32 control output per control module. Two master relays32 control output per control module. Two master relays

for each output. One for close and one for trip.for each output. One for close and one for trip. Through the maintenance port, we can download theThrough the maintenance port, we can download the

database, view data and Communications specific to eachdatabase, view data and Communications specific to eachperipheral board and trouble shoot .peripheral board and trouble shoot .

Advanced diagnostic capabilities Advanced diagnostic capabilities TimeTime synchronisationsynchronisation of RTU done at every 1 minute.of RTU done at every 1 minute.


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Scan CyclesScan Cycles

All the analog data are scanned every 10/12 All the analog data are scanned every 10/12

secondsseconds

Status information are reported by exceptionStatus information are reported by exception All status information are scanned for integrity All status information are scanned for integrity

check every 10 minutescheck every 10 minutes

The SOEThe SOE datasdatas are time stamped at 1 msare time stamped at 1 ms

resolutionresolution

TimeTime synchronisationsynchronisation is done every 10is done every 10minutesminutes


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Current TransformerCurrent Transformer

A A current transformercurrent transformer is a measurementis a measurementdevice designed to provide a current in itsdevice designed to provide a current in itssecondary coil proportional to the currentsecondary coil proportional to the currentflowing in its primary .flowing in its primary .

The current transformer isolatesThe current transformer isolatesmeasurement and control circuitry from themeasurement and control circuitry from thehigh voltages typically present on the circuithigh voltages typically present on the circuitbeing measured .being measured .

Common secondary are 1 or 5Common secondary are 1 or 5 amperes. Foramperes. Forexample, a 4000:5 CT would provide anexample, a 4000:5 CT would provide anoutput current of 5output current of 5 amperes when theamperes when theprimary was passing 4000 amperes .primary was passing 4000 amperes .


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Capacitor Voltage TransformerCapacitor Voltage Transformer

Capacitor Voltage transformers (Capacitor Voltage transformers (CVTsCVTs) are) areused for metering and protection in highused for metering and protection in high--

voltage circuits. They are designed tovoltage circuits. They are designed to

present negligible load to the supply beingpresent negligible load to the supply beingmeasured and to have a precise voltagemeasured and to have a precise voltage

ratio to accurately step down highratio to accurately step down high

voltages so that metering and protectivevoltages so that metering and protective

relay equipment can be operated at arelay equipment can be operated at a

lower potential.lower potential.


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Basic Function Of the CVTBasic Function Of the CVT

Where CHF is the equivalent ratedWhere CHF is the equivalent ratedcapacitance for carriercapacitance for carriercommunicationcommunication

* C1 : High Voltage capacitor* C1 : High Voltage capacitor

* C2 : Intermediate Voltage* C2 : Intermediate Voltage

CapacitorCapacitor* C1 / C2 ratio is such that the* C1 / C2 ratio is such that therequired intermediate voltage canrequired intermediate voltage canbe achievedbe achieved

L : Inductance of the choke whichL : Inductance of the choke whichis designed tois designed to

* Prevent carrier signals from* Prevent carrier signals fromflowing into the transformer circuit.flowing into the transformer circuit.

* Resonate with the capacitor* Resonate with the capacitorunit at 50 Hz which is the ratedunit at 50 Hz which is the ratedfrequency.frequency.

D : Damping burden which isD : Damping burden which isprovided across one of theprovided across one of the

secondary windings to preventsecondary windings to preventterroresonanceterroresonance oscillations.oscillations.

TrTr : Transformer designed to: Transformer designed toprovide the required output voltageprovide the required output voltageat the desired burdenat the desired burden

Metering

Protection

D

1a

1n

2a

2n

HV

C1

C2

TrL

CHF


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COMMUNICATION

REQUIREMENTS FOR

SCADA


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COMMUNICATIONCOMMUNICATION

REQUIREMENTS FOR SCADAREQUIREMENTS FOR SCADA

Communication media should have:Communication media should have:* High Reliability* High Reliability

* High Availability* High Availability

* Rapid Response* Rapid Response

* Transparency* Transparency

* Economy* Economy* Flexibility* Flexibility

* Maintainability* Maintainability


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Modes of CommunicationModes of Communication

PLCCPLCC Leased Telephone circuitsLeased Telephone circuits

Microwave CommunicationMicrowave Communication

FibreFibre Optics CommunicationOptics Communication

Satellite CommunicationSatellite Communication


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PLCCPLCC High voltage lines themselves are used as communicationHigh voltage lines themselves are used as communication

links.links.

Carrier Frequency: 50Carrier Frequency: 50--300 KHz.300 KHz.

3 channels are used generally:3 channels are used generally:

MainMain--ChannelChannel -->>

speech channelspeech channel –– 300 Hz to 2000 Hz300 Hz to 2000 Hz

Telemetring Telemetring-- 2000 Hz to 3400 Hz2000 Hz to 3400 Hz

ProtectionProtection--ChannelChannel--II -->>speech channelspeech channel –– 300 Hz to 2000 Hz300 Hz to 2000 Hz

Teleprotection Teleprotection-- 2000 Hz to 3400 Hz2000 Hz to 3400 Hz

ProtectionProtection--ChannelChannel--II (BackupII (Backup--Protection)Protection)-->>speech channelspeech channel –– 300 Hz to 2000 Hz300 Hz to 2000 Hz

Teleprotection Teleprotection-- 2000 Hz to 3400 Hz2000 Hz to 3400 Hz


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PLCCPLCC Advantages: Advantages:

1.1. High reliabilityHigh reliability

2.2. All channels are available for dedicated use by All channels are available for dedicated use bypowerpower--utility aloneutility alone

Disadvantages: Disadvantages:

1.1. Cost of insulating communication equipment is highCost of insulating communication equipment is high2.2. High noise level due to CoronaHigh noise level due to Corona

3.3. High speed dataHigh speed data--transfer not possible because oftransfer not possible because of

Bandwidth limitations.Bandwidth limitations.


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Applications of PLCC Applications of PLCC Voice Communication Voice Communication

FascimileFascimile TransmissionTransmission TeleTele--ProtectionProtection

TeleTele--MeteringMetering


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Types of Couplings Types of Couplings

3 coupling schemes to couple voice, fax,3 coupling schemes to couple voice, fax,teletele--protection andprotection and teletele--metering to themetering to the

highhigh--voltage transmission line:voltage transmission line:

PhasePhase--toto--Ground CouplingGround Coupling

PhasePhase--toto--Phase CouplingPhase Coupling

InterInter--Line CouplingLine Coupling


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STATION-B

PLCC PANELS

STATION-A

LMU

ESLADC

CC

WT

PLCC PANELS

ESLADC

CC

WT

PHASE-TO-GROUND COUPLING

ES=Earth Switch DC=Drainage Coil WT=Wave Trap

LA=Lightening Arrester LMU=Line Matching Unit CC=Coupling capacitor


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STATION-B

PLCC PANELS

STATION-A

LMU

ESLADC

CC

WT

PLCC PANELS

ESLADC

CC

WT

PHASE-TO-PHASE COUPLING


LA=Lightening Arrester LMU=Line Matching Unit CC=Coupling

capacitor

BT=Balancing Transformer

WT

LMU

BT BT

LMU LMU

CC

WT

CC

INTER LINE COUPLING


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STATION-B

PLCC PANELS

STATION-A

LMU

ESLADC

CC

WT

PLCC PANELS

ESLADC

CC

WT

INTER-LINE COUPLING


LA=Lightening Arrester LMU=Line Matching Unit CC=Coupling capacitor BT=Balancing

LMU

BT BT

LMU LMU

CCCC


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Microwave CommunicationMicrowave Communication

LineLine--of of --sight communicationsight communication

Requires repeaters at 50Requires repeaters at 50--6060 kmskms. Intervals. Intervals

Provides sufficient bandwidth to meet the needs ofProvides sufficient bandwidth to meet the needs ofpower utilitypower utility

Higher availability than PLCC,Higher availability than PLCC, availablityavailablity not affected bynot affected bymaintenance or faults on the power linesmaintenance or faults on the power lines

Suffers fromSuffers from multipathmultipath--fading effectfading effect

In India, WPC (wireless planning & coIn India, WPC (wireless planning & co--ordination) wingordination) winghas assigned 2.3has assigned 2.3--2.5 GHz and 2.82.5 GHz and 2.8--5 GHz bands to power5 GHz bands to powersector usage.sector usage.


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Digital Microwave Systems


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Leased Telephone CircuitsLeased Telephone Circuits•Simple solution, no need to develop own

dedicated communication facility bypower utility

•Availability of this mode ofcommunication at remotely locatedsubstations is the deciding factor


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FiberFiber--Optic CommunicationOptic Communication FiberFiber--optic communication is a method of transmitting information fromoptic communication is a method of transmitting information from

one place to another by sending light through an optical fiber.one place to another by sending light through an optical fiber. The lightThe light

forms an eforms an electromagnlectromagnetic carrier wave that isetic carrier wave that is modulmodulated to carryated to carry

informationinformation

• The process of communicating using fiber-optics involves the following basicsteps:

Creating the optical signal using a transmitter

Relaying the signal along the fiber, ensuring that the signal does not

become too distorted or weakReceiving the optical signal and converting it into an electrical signal

Analog/DigitalInterface

Voltage toCurrentconverter

LightSource

Source toFiber

Interface

Fiber toLight

Detector

Interface

LightDetector

Current toVoltage

converter

Analog/DigitalInterface

OUTPUT

INPUT

Optical Fiber


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Fiber Optic CommunicationFiber Optic Communication Advantages: Advantages:

The ability to carry much more information and deliver it wiThe ability to carry much more information and deliver it with greater fidelityth greater fidelitythan either copper wire or coaxial cable.than either copper wire or coaxial cable.

Fiber optic cable can support much higher data rates, and aFiber optic cable can support much higher data rates, and at greater distancest greater distances

The fiber is totally immune to virtually all kinds of interferenThe fiber is totally immune to virtually all kinds of interference, includingce, includinglightning, and will not conduct electricity. It can therefore colightning, and will not conduct electricity. It can therefore come in directme in direct

contact with high voltage electrical equipment and power lines.contact with high voltage electrical equipment and power lines.

POWERGRIDPOWERGRID uses overhead fiber optic communication:uses overhead fiber optic communication:

OPGWOPGW (optical ground wire cable)(optical ground wire cable)ADSSADSS (all dielectric self supporting cable)(all dielectric self supporting cable)

WRAP AROUNDWRAP AROUND


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Fibre Optic Systems


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OPGW

FODP OLTE

ADD DROP MUX2 MB/S

MICROWAVE RADIO

TERMINAL

2 MB/S

INTEGRATION OF DIGITAL & ANALOG

NETWORKS

PLCC

VOICE

CARD

DATACARD


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OPGWOPGW OPGW (optical ground wire) replacesOPGW (optical ground wire) replaces

shield wiresshield wires•• Provides lightning protectionProvides lightning protection

•• Provides communicationProvides communication

•• Lightning short circuit damageLightning short circuit damage

•• Installation requires long term outageInstallation requires long term outage

•• ExpensiveExpensive•• Superior performanceSuperior performance


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ADSS F.O ADSS F.O

ADSS (all dielectric self supporting) which ADSS (all dielectric self supporting) whichis mounted at various locations, typically 3is mounted at various locations, typically 3

to 10 meters below the phase conductorsto 10 meters below the phase conductors..

ADSS costs less than OPGW ADSS costs less than OPGW Higher fiber count than Wrap type.Higher fiber count than Wrap type.

Can be installed on towers not designedCan be installed on towers not designed

for shield wires.for shield wires.

Suitable for hot line installationSuitable for hot line installation


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WRAP AROUND F.OWRAP AROUND F.O

WrapWrap--type which is wound aroundtype which is wound aroundshield wires and, in some instances,shield wires and, in some instances,around energized conductorsaround energized conductors

HotHot--line installation is difficultline installation is difficult Cost more than ADSS, but less thanCost more than ADSS, but less than

OPGWOPGW

Need a shield wireNeed a shield wire No operation problem is observedNo operation problem is observed


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OPGW

WRAP

ADSS

OVERHEAD CABLES FOROVERHEAD CABLES FOR

POWER UTILITIESPOWER UTILITIES


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OPGW ADSS WRAP AROUND

AL STRAND

AL COATED STEEL STRAND

AL TUBE

XLPE SHEATH

POLYESTER TAPE

MOISTURE BLOCKING COMPOUND

AERIAL OPTICAL FIBRE CABLES

FIBRE

STRENGTH MEMBERS

LOOSE TUBE

AD\AS\RKG\JP\FIBCROSS

FIBRE OPTIC CABLE INSTALLATION


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OPGW

WRAP AROUND

ADSS

AD\AS\RKG\JP\FIBINST


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SATELLITE COMMUNICATIONSATELLITE COMMUNICATION

A geostationary satellite isA geostationary satellite is

used as an active repeater.used as an active repeater. Modulated signals are sendModulated signals are send

from earthfrom earth VSATs VSATs in 6 GHzin 6 GHz

band to the satellite.band to the satellite.

Signals are beamed back toSignals are beamed back toearth in 4 GHz band.earth in 4 GHz band.

RoundtimeRoundtime propagation delaypropagation delay

of 540ms existsof 540ms exists

Communication is interruptedCommunication is interrupted

during eclipses.during eclipses.


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WHAT IS SCADAWHAT IS SCADA

SSupervisoryupervisory CControlontrol A Andnd DDataata A Acquisitioncquisitionis the system which enables us tois the system which enables us to

“ “supervise, control,supervise, control, optimiseoptimise and manage theand manage thePower Systems in an efficient manner toPower Systems in an efficient manner to

provide stable, secure and reliable power to theprovide stable, secure and reliable power to the

end consumerend consumer””..


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FUNCTIONS OF SCADA FUNCTIONS OF SCADA

DATA ACQUISITIONDATA ACQUISITION PROCESSING OF ACQUIRED DATA.PROCESSING OF ACQUIRED DATA.

LIMIT / STATUS MONITORING & ALARMING.LIMIT / STATUS MONITORING & ALARMING.

NETWORK STATUS PROCESSOR.NETWORK STATUS PROCESSOR. SEQUENCE OF EVENT RECORDING.SEQUENCE OF EVENT RECORDING.

INFORMATION STORAGE & RETRIEVAL.INFORMATION STORAGE & RETRIEVAL.

DATA EXCHANGEDATA EXCHANGE

SUPERVISORY CONTROL.SUPERVISORY CONTROL.


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SCOPE FOR DATASCOPE FOR DATA-- ACQUISITION ACQUISITION

UNDER ULDC SCHEMES in INDIAUNDER ULDC SCHEMES in INDIA

All generating stations of 50MW or All generating stations of 50MW or

above(10 MW or above in case of NER)above(10 MW or above in case of NER)

All 400 KV Sub All 400 KV Sub--Stations.Stations.

All 220 KV Sub All 220 KV Sub--Stations.Stations.

All 132 KV Sub All 132 KV Sub--Stations operated whereStations operated where

InterInter--State lines are located.State lines are located.Important 66 KV SubImportant 66 KV Sub--Stations (NER only).Stations (NER only).

Information Flow to ControlInformation Flow to Control CentresCentres


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Andhra Pradesh

Karnataka

Kerala

Tamilnadu

UT of Pondy

Vijayawada

Warangal

HYDERABAD

Ghanapur

ChinkampalliCHENNAI

Pondy

Madurai

Kannur-B

KALAMASSERY

Vydyuthi Bhavanam

Erode

MW Link

FO LinkState owneed Link

Sub-LDC

SLDC

RCLDC

LingasugurDavangere

Bangalore

Information Flow to ControlInformation Flow to Control CentresCentres

Satellite

Ramagundam


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VIJAYAWADATALLAPALLI

GAJUWAKA

VIDYUTH SOUDHA

GOOTY

SALEM400

UDUMALPETTRICHUR NORTH

MADURAI

TRICHY

SRIPERUMBUDUR

NEYVELI

CHINAKAMPALLYDAVANAGERE

RAMAGUNDAM

PONDY

SOMANAHALLI

P

N

PALLOM

KAYANKULAM

RSCC (1)

CPCC (1)

SLDC (4)

SUB-LDC / SCC (14)

FIBRE OPTIC LINK 110/132kv

FIBRE OPTIC LINK (220kv)

FIBRE OPTIC LINK (400kv)

FIBRE OPTIC LINK (SEB)

MICROWAVE LINK (35 links)

SATELLITE LINK (KEB)

RTU LOCATIONS 201

WARANGAL

PEDAPALLI

DURSHEDJAMMIKUNTA

VTPS

VIZAG SWS

KAKINADA

BOMMUR

BHIMADOLE

N’SAGAR PH

SRISAILAM PH

SRISAILAM LBPHKURNOOL

SOMAYAJULAPALLI

MUDDANOOR RTPP

ANANTHAPUR

SHAPURNAGAR

GHANAPUR

CH.GUTTA

HYDERABAD 400

LEGENDLEGEND

CHALAKUDI

KALAMASSERY

VIAKKAM

KUNDRAPARIPALLI

TRIVANDRUM NORTH

VYDYUTHI BHAVANAM

KOZHIKODE

KANNUR-B

MADURAI400

CHENNAI

CHIDAMBARAM

MYLADUTURAI

SALEM230

ERODE

SIVAGANGA

KARAIKUDI

THIRUMAYAMPUDUKOTTAI

THIRUVARURORTHANADU

KOVILVENNI

ADANIKOTTAI

INGUR

PONGALORE

PANRUTI

VILLIANUR

SP.KOVIL

BANGALORE

KUMBALGODI

HUBLI

APSEB

RTU’S

82

TNEB

RTU’S

40

KSEB

RTU’S

30

KEB

RTU’S

22

PONDY

RTU’S

05

CENTRAL

SECTOR RTU’S

22

Lingasugur

Wideband Channel Routing for Madurai Sub-LDC


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Sembatti

Madurai 400

Trichy 400

Paramakudi SamayapuramMadurai North

Kodayar PH2

Madurai

Sub LDC

Karaikudi

Tanjore 230

S R PudurPariyar PH

Theni Kayathar

E

Sathur

TTPS

Podukotta

C

Echengodu

Adanakottai

Peramballur

Kovilvenni

Pugalur

Thiruvarur

Tuticorin Auto

Trichy 230

Chennai

Sub-LDC

(NLC TS-I)

Erode Sub-LDC

(Erode)

OrthonaduSivagangai

Existing RTU – 9 nos.

Existing RTU integrated

New RTUs – 13 nos.

PLCC Link

MW Link

COMMUNICATION NETWORK FOR KERALA


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ChalakudyT. NorthKozhikode -BKannur-B

Kalamassery

PallomKayamkulamKundraParipallyTrivendrum

North

Vidyuthi

Bhavanam

RSCC,Bangalore

(Udumalpet)

Wideband Routing from Sub-LDC to SLDC,(Kalamassery)

COMMUNICATION NETWORK FOR KERALA

MW Link

FO Link

Date post:	05-Jul-2018
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