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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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