Synchrophasor Initiative in India - erldc

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SYNCHROPHASORS - INITIATIVE IN INDIA JUNE 2012Table 8: Grid events in 2012 wherein synchrophasors were used for post fault analysisAvailability ofEventsSl.No.Date Time Event DetailsDisturbanceRecord/Event logAnalysisreportanalyzedwith PMUdata12-Jan-124:00 to6:00Multiple autoreclosure of 400kVBassi-Heeerapura lines Yes No YesMultiple tripping at 400/220kV12-Feb-12Muradnagar Substation210:20(UPPTCL) No No Yes314-Jan-125:39Multiple tripping at 400kVAllahabad substation (PG) Yes No Yes420-Jan-1217:35Multiple tripping at 400kVBamnauli substation (DTL) No Yes Yes513-Mar-1217:37Generation loss at Dadri TPS(NTPC) No No Yes62-Apr-121:26Tripping of ICT's at GreaterNoida substation (UPPTCL) Yes Yes YesMultiple tripping at4-Apr-12400kVAzamgarh Substation712:43(UPPTCL) No No Yes85-Apr-1210:22Multiple tripping and generationloss at Khedar TPS (HVPNL) Yes Yes Yes98-Apr-1215:19Multiple tripping at 765/400kVUnnao Substation(UPPTCL) No No YesGeneration loss at Anpara TPS1019-Apr-123:29(UPPTCL) & Rihand Stage-1(NTPC) No No YesGeneration loss and miltiple26-May-12tripping in 220kV system of delhi118:32and Haryana No No YesPOSOCO Page 70 of 143
SYNCHROPHASORS - INITIATIVE IN INDIA JUNE 20125.2 Detection of fault in neighboring gridsThe synchrophasors data provides a signature of the dynamic power system. In aninterconnected synchronous system the effect of the perturbation in one part can be sensed atother parts with the help of data from synchrophasors.5.2.1 Case Study-14: Three phase fault at 400 kV Bina on 22-Feb-2012From figure 57 the voltage profile at 400 kV Dadri (in Northern Region) shows dip in voltage ofall the three phases for a fault a 3 phase fault at 400/220kV Bina substation of MPPTCL(Western region). It can be seen that the fault got cleared in 520 milli second i.e. in Zone-2 time.Figure 57: Dip in 3-phase voltage seen in Dadri (NR) during fault at 400 kV Bina (WR)POSOCO Page 71 of 143
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Synchrophasor Initiative in India - erldc

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