Synchrophasor Initiative in India - erldc

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SYNCHROPHASORS - INITIATIVE IN INDIA JUNE 2012Snapshot of Dulhasti station Event logger is shown above. It can be observed that the StationEvent logger print time matches with PMU time.Figure 77: Snapshot of Disturbance RecorderFigure above shows the Disturbance recorder (digital signal) prints and it can be observed thatthe PMU time is not matching with Disturbance record. Hence it was concluded that the D.Rwas not time synchronized & same was later rectified by Dulhasti HEP.POSOCO Page 86 of 143
SYNCHROPHASORS - INITIATIVE IN INDIA JUNE 20125.4.4 Case Study-23: Validation of the DR at 400 kV Bareilly (PG)Figure 78 shows the voltage profile of 400kV Kanpur bus during a high resistance fault in R-Phase at 400kV Bareilly (UPPTCL) which persisted for nearly 20 seconds. The synchrophasorsdata received from 400 kV Kanpur was compared with Disturbance recorder print sent byBareilly (P.G) substation (refer figure 79). It can be observed that the fault in neutral remainedfor nearly 20 seconds and got cleared at 00:56:57.699 which closely matches with PMU time.Figure 78: Voltage profile of Kanpur bus showing a high resistance fault at 400kV Bareilly UPFigure 79: D R print recorded at Bareilly (PG)POSOCO Page 87 of 143
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Synchrophasor Initiative in India - erldc

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