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1 FIRST STEPS TOWARDS SYNERGISING COMMUNICATION SYSTEM, WAMS AND SITUATIONAL AWARENESS SYSTEM U.G.ZALTE, EX-DIRECTOR (OPERATIONS) –MSETCL, A.R. KULKARNI. DATE: 13-15 NOVEMBER 2013 CIGRE TUTORIAL AND COLLOQUIUM ON SMARTGRID MYSORE, KARNATAKA - INDIA . 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 MSETCL ROLE Transmission Licensee State Load Dispatch Centre (SLDC) State Transmission Utility (STU) 4 MSETCL INFRASTRUCTURE AS ON 31st JULY 2013 . Transformation Capacity (MVA)= 100316 EHV Substations= 590 16000 50000 300 14446 43608 45000 273 14000 40000 250 EHV Lines (CKT KM.)= 42112 13031 12000 35000 200 185 10000 30000 25000 150 24418 22280 20000 100 25 2 0 34 37 34 3270 4000 10000 5000 3582 2674 2610 1144 2000 1504 1724 697 0 0 EHV Substation 7440 6000 15000 50 8000 Transformation… EHV Lines (CKT KM.) 5 MSETCL 400kV Network Overview 6 Communication System architecture in MSETCL 7 Total bandwidth Requirement for various applications in use at 400kV Dhule substation Bandwidth for RTU data Communication Bandwidth for ERP data Communication Bandwidth for ABT data Communication Bandwidth for VOIP data Communication Bandwidth for WAMS data communication Total bandwidth requirement 414.46Kbps 824Kbps 5.33 Kbps 87.2Kbps 128.0 1479.53 Kbps (1.47Mbps) 8 MSETCL WIDE AREA MEASUREMENT SYSTEM (WAMS) INFRASTRUCTURE AND CASE STUDY 9 Architecture of WAMS infrastructure in MSETCL. Typical Architecture for Synchrophasor System A4 color Printer Workstation Console Data Historian Server PDC Ethernet Switch Router cum firewall Ethernet Cat-5 Cable RG 58 A/U Cable GPS Clock-1 PMU-1 Power Substation-1 MSETCL Communication Interface module GPS Clock-2 PMU-2 Power Substation-2 PMU-15 Power Substation-15 10 PMU Locations in MSETCL System 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 6 400 kV Kalwa Critical Grid substation 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 14 220 kV Boisar 15 220 kV Eklahare GCR Critical Grid substation Attached to Thermal Generating station Within Greater Mumbai Area Within Greater Mumbai Area 11 PARAMETERS OBSERVED ON SYNCHROPHASOR SYSTEM AT SLDCKALWA Delta Voltages Currents Frequency df/dt Active power Reactive power 12 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 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 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 kV 15 Current Rise in R-Phase observed at 400kV Koradi Rise in R-Phase Current observed at 400kV Koradi from 0.4kA to 1.20 kA 16 Frequency and df/dt Variation observed by PMUs during Occurrence at 400kV Deepnagar Substation 17 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) 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 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? 19 Dataflow from PMUs to Situational Awareness system Data from PMUs PDC IEC -104 Converter 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 21 Status of data being sent from PMUs to PDC 22 Status of data being sent properly from IEC-104 converter to Situational Awareness system 23 IEC-104 converter not communicating with Situational Awareness system 24 IEC-104 Converter communicating with Situational Awareness system 25 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 THANK YOU !! 27