Synchrophasor Initiative in India - erldc

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SYNCHROPHASORS - INITIATIVE IN INDIA JUNE 20125.1.5 Case Study-10: Generation loss at Rihand STPS on 1-June-2010Voltage profile at 400kV Vindhyachal bus during incident of generation loss at Rihand STPS inNorthern region is shown at figure 53. It can be seen that the fault got cleared in around 320milliseconds which indicated the possible operation of Local breaker Backup protection. The samewas confirmed by the information received from substation.Figure 53: Voltage profile at Vindhyachal indicating the probable operation of LBB protectionPOSOCO Page 66 of 143
SYNCHROPHASORS - INITIATIVE IN INDIA JUNE 20125.1.6 Case Study-11: Multi-phase fault at Bamnauli on 20-Jan-2012The figure below shows the voltage profile of 400kV Dadri bus during occurrence of multiphasefault at Bamnauli substation in Northern region. It can be made out from the graph that the faultgot cleared in 920 milliseconds. The same was later confirmed from the information receivedfrom substation.Figure 54: Voltage profile at Dadri indicating possible operation of back up protectionPOSOCO Page 67 of 143
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Synchrophasor Initiative in India - erldc

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