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U.G.ZALTE,
EX-DIRECTOR (OPERATIONS) –MSETCL,
A.R. KULKARNI.
DATE: 13-15 NOVEMBER 2013
CIGRE TUTORIAL AND COLLOQUIUM ON SMARTGRID
MYSORE, KARNATAKA - INDIA .
FIRST STEPS TOWARDS SYNERGISING COMMUNICATION
SYSTEM, WAMSAND SITUATIONAL AWARENESS
SYSTEM
COVERAGEINTRODUCTIONMSETCL SYNCHROPHASOR SYSTEM
DETAILSCASE STUDY : ANALYSIS OF
OCCURRENCE IN THE GRID USING SYNCHROPHASOR SYSTEM
EXPERIENCE OF INTEGRATING WAMS AND SITUATIONAL AWARENESSS SYSTEM
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MSETCL ROLE
Transmission Licensee
State Load Dispatch Centre (SLDC) State Transmission Utility (STU)
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2
25
185
273
34 37 34
0
50
100
150
200
250
300
EHV Substations= 590
EHV Substation
3582
22280
43608
24418
2674 26101144
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
50000
Transformation Capacity (MVA)= 100316
Transformation …
1504
7440
14446
13031
1724697
3270
0
2000
4000
6000
8000
10000
12000
14000
16000
EHV Lines (CKT KM.)= 42112
EHV Lines (CKT KM.)
MSETCL INFRASTRUCTURE AS ON 31st JULY 2013 .
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MSETCL 400kV Network Overview
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Communication System architecture in MSETCL
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Total bandwidth Requirement for various applications in use at
400kV Dhule substationBandwidth for RTU data Communication 414.46Kbps
Bandwidth for ERP data Communication 824Kbps
Bandwidth for ABT data Communication 5.33 Kbps
Bandwidth for VOIP data Communication 87.2Kbps
Bandwidth for WAMS data communication 128.0
Total bandwidth requirement 1479.53 Kbps (1.47Mbps)8
MSETCL WIDE AREA MEASUREMENT SYSTEM (WAMS) INFRASTRUCTURE AND CASE
STUDY
MSETCL WIDE AREA MEASUREMENT SYSTEM (WAMS) INFRASTRUCTURE AND CASE
STUDY
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Architecture of WAMS infrastructure in MSETCL.
PDC
Ethernet Switch
Workstation Console
PMU-1
GPS Clock-1
Router cum firewall
A4 color Printer
Ethernet Cat-5 CableRG 58 A/ U Cable
Power Substation-1
PMU-2
Power Substation-2
PMU-15
Power Substation-15
Data Historian Server
MSETCL Communication Interface module
GPS Clock-2
Typical Architecture for Synchrophasor System
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Sr. No. Substation Name Substation Type
1 400 kV Chandrapur Attached to Thermal Generating station & Interstate interface
2 400 kV Koradi Attached to Thermal Generating station
3 400 kV Bhusawal (Khadka) Attached to Thermal Generating station
4 400 kV New Koyna Attached to Hydro station
5 400 kV Padghe Critical Grid substation
Critical Grid substation6 400 kV Kalwa
7 400 kV Dhule Grid substation & Interstate interface
8 400kV Kolhapur (Talandge) Grid substation
9 400kV Aurangabad (Waluj) Critical Grid substation
10 400 kV Lamboti Grid substation
11 400 kV Lonikand Critical Grid substation
12 400 kV Girawali Attached to Thermal Generating station & Interstate interface
13 220 kV Trombay Attached to Thermal station
Critical Grid substation14 220 kV Boisar
15 220 kV Eklahare GCR Attached to Thermal Generating station
PMU Locations in MSETCL System
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Within Greater Mumbai Area
Within Greater Mumbai Area
PARAMETERS OBSERVED ON SYNCHROPHASOR SYSTEM AT
SLDC-KALWA Delta Voltages Currents Frequency df/dt Active power Reactive power
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Occurrence at 400kV Deepnagar Substation and calculation of H
• On 22.05.2013, at 22 :48 :22 :200 Hrs, it is observed that, R phase Bus-1 CT of GT-5 bay failed and burst resulting into operation of busbar protection of main Bus-I.
• At the same time, B phase pole of main CB of 400 kV Khadka Circuit-2 failed and burst. The bus bar protection for Main bus-2 also operated.
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Occurrence at 400kV Deepnagar Substation and calculation of H
• Both the 400 kV buses became dead resulting into failure of supply at 400kV Deepnagar substation. This occurrence has also resulted into generation loss of 531 MW in the state grid.
• Rate of change of frequency (df/dt) recorded by PMU’s is utilised to calculate inertia constant ‘H’ for Maharashtra system.
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Voltage Dip observed at various locations of PMU placement in MSETCL system
LOCATIONS Ph.-G Voltage Drop Observed in R-Ph From To
400kV Dhule 236.69 kV 209.87 kV
400kV Koradi 246.92 kV 221.26 kV
400kV Lonikand 234.11 kV 224.25 kV15
Current Rise in R-Phase observed at 400kV Koradi
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Rise in R-Phase Current observed at 400kV Koradi from
0.4kA to 1.20 kA
Frequency and df/dt Variation observed by PMUs during
Occurrence at 400kV Deepnagar Substation
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Calculation of H from df/dt measured from PMU during occurrence at 400kV Deepnagar Substation on 22.05.2013
i) ΔP - Generation loss during occurrence = 531 MW ii) P : Total Generation in Maharashtra on 22.05.2013 = 15,973 MWiii) F0 : Frequency before the disturbance = 50.02 Hz
iv) df/dt measured from PMU : (-0.119) H = (531) / (15973) * 50.02 / [ 2* (-0.119)]
H = -6.25 Sec.18
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PAPER : D2- 01_25
• What are the procedures followed while integrating Synchrophasor System with Situational Awareness System?
• What are the challenges faced for the integration?
Data from PMUs
PDC
IEC -104 Converter
Situational Awareness System
Dataflow from PMUs to Situational Awareness system
PROCEDURAL CHECKS & CHALLENGES
Proper Communication System . Allocation of IPs and its proper use alongwith Gateway, Proper
LAN formation . Ensuring proper Interoperability between WAMS and Situational
Awareness system . Ensuring proper data receipt of following :
a) From PMUs to PDC
b) From PDC to IEC-104 Converter
c) From IEC-104 Converter to Situational Awareness system Data Validation, Point to Point test for WAMS and Situational
Awareness system data . Ensuring proper Visualisation of data in Situational Awareness
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Status of data being sent from PMUs to PDC
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Status of data being sent properly from IEC-104 converter
to Situational Awareness system
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IEC-104 converter not communicating with Situational
Awareness system
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IEC-104 Converter communicating
with Situational Awareness system
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CONCLUSIONS
It discussed importance of communication system, bandwidth utilisation for different application being used in transmission system including that of WAMS.
Discusses in brief MSETCL initial experience with Synchrophasor system in analysing occurrence in the grid.
Brief information on initial integration related aspects between Synchrophasor system and Situational awareness system .
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THANK YOU !!
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