Phasor measurement unit: Making the grid smarter a case studyof voltage dip on 11kV feeders during fault at 220kV Samaypur Station, Faridabad (India) of BBMB Dated May 21, 2013 (23:55:06hrs)

This research paper discuss the application of Phasor Measurement Unit (PMU) which provides advance monitoring and recording of any faults or disturbances on any grid. It also presents the idea of PMU as essential component for the Smart Grid to be a reality. The importance of PMU can be realized when discrete records of events are captured simultaneously at various points on the power system, to provide a complete picture of the event of voltage dip on 11kV feeders due to fault at 220kV Samaypur substation, Faridabad (India). On May 21, 2013 at 23:55:06 Hrs, there was a fault at 220kV Samaypur station (as reported Y&B Phase CTs). Due to non-clearing of fault up to 1200ms, other 220kV feeders emanating from 220kV Samaypur station and ICT-I, II, III & IV at Ballabhgarh, Haryana (India) also tripped and the frequency rose from 50.06 Hz to 50.71Hz. Due to this fault at 220kV Samaypur, a large number of 11kV feeders and DTs in all DISCOMS (Approximately 70 nos. in BRPL) got also tripped on overcurrent operation of relay and rest of the feeders were in ON condition. Before the instant of fault occurrence, the grid frequency was 49.95Hz as reported.