1. 1

2. 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, WAMS AND SITUATIONAL AWARENESS SYSTEM

3. COVERAGE  INTRODUCTION  MSETCL SYNCHROPHASOR SYSTEM DETAILS  CASE STUDY : ANALYSIS OF OCCURRENCE IN THE GRID USING SYNCHROPHASOR SYSTEM  EXPERIENCE OF INTEGRATING WAMS AND SITUATIONAL AWARENESSS SYSTEM 3

4. MSETCL ROLE Transmission Licensee State Load Dispatch Centre (SLDC) State Transmission Utility (STU) 4

5. MSETCL INFRASTRUCTURE AS ON 31 st JULY 2013. 5

6. MSETCL 400kV Network Overview 6

7. Communication System architecture in MSETCL 7

8. Total bandwidth Requirement for various applications in use at 400kV Dhule substation Bandwidth for RTU data Communication414.46Kbps Bandwidth for ERP data Communication824Kbps Bandwidth for ABT data Communication5.33 Kbps Bandwidth for VOIP data Communication87.2Kbps Bandwidth for WAMS data communication128.0 Total bandwidth requirement1479.53 Kbps (1.47Mbps) 8

9. MSETCL WIDE AREA MEASUREMENT SYSTEM (WAMS) INFRASTRUCTURE AND CASE STUDY 9

10. Architecture of WAMS infrastructure in MSETCL. 10

11. Sr. No.Substation NameSubstation Type 1400 kV ChandrapurAttached to Thermal Generating station & Interstate interface 2400 kV KoradiAttached to Thermal Generating station 3400 kV Bhusawal (Khadka)Attached to Thermal Generating station 4400 kV New KoynaAttached to Hydro station 5400 kV Padghe Critical Grid substation 6400 kV Kalwa 7400 kV Dhule Grid substation & Interstate interface 8400kV Kolhapur (Talandge)Grid substation 9400kV Aurangabad (Waluj)Critical Grid substation 10400 kV LambotiGrid substation 11400 kV LonikandCritical Grid substation 12400 kV GirawaliAttached to Thermal Generating station & Interstate interface 13220 kV Trombay Attached to Thermal station Critical Grid substation 14220 kV Boisar 15220 kV Eklahare GCRAttached to Thermal Generating station PMU Locations in MSETCL System 11 Within Greater Mumbai Area

12. PARAMETERS OBSERVED ON SYNCHROPHASOR SYSTEM AT SLDC- KALWA  Delta  Voltages  Currents  Frequency  df/dt  Active power  Reactive power 12

13. 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. 13

14. 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. 14

15. Voltage Dip observed at various locations of PMU placement in MSETCL system LOCATIONS Ph.-G Voltage Drop Observed in R-Ph From To 400kV Dhule236.69 kV209.87 kV 400kV Koradi246.92 kV221.26 kV 400kV Lonikand234.11 kV224.25 kV 15

16. Current Rise in R-Phase observed at 400kV Koradi 16 Rise in R-Phase Current observed at 400kV Koradi from 0.4kA to 1.20 kA

17. Frequency and df/dt Variation observed by PMUs during Occurrence at 400kV Deepnagar Substation 17

18. 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 MW iii) F 0 : 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

19. 19 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?

20. Data from PMUs PDC IEC -104 Converter Situational Awareness System Dataflow from PMUs to Situational Awareness system

21. 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 21

22. Status of data being sent from PMUs to PDC 22

23. Status of data being sent properly from IEC-104 converter to Situational Awareness system 23

24. IEC-104 converter not communicating with Situational Awareness system 24

25. IEC-104 Converter communicating with Situational Awareness system 25

26. 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. 26

27. THANK YOU !! 27