Operational experience of Synchrophasor pilot project in Southern India

Worldwide, Synchrophasors have enhanced wide area visualization and situational awareness of power system behaviour under steady state as well in transient/ dynamic conditions. Grid event analysis at the Load Dispatch Centres in India was conventionally done with the help of protection relay flags, Disturbance record and Event logger data record forwarded by the respective transmission substations as well as the SCADA Sequence of Events (SoE) records, analogue data from wide area SCADA/EMS and Operator log book records. The availability of Synchrophasor data at control center has become first-hand information for a grid operator to view and analyze any transient phenomenon occurring in the grid. The system operator could also visualize the cause of the disturbance from the typical `signature´ it leaves on the waveforms. This paper seeks to present few case studies where the PMU data provided significant insight while analyzing the events that occurred in southern region grid.