Synchrophasor Initiative in India - erldc

SYNCHROPHASORS - INITIATIVE IN INDIA JUNE 20125.3.3 Case Study-18: Load crash in NR on 20, 21, 22-May 2011Thunderstorm and rains swept across large parts of Northern Region during the night and earlymorning hours of 20th ,21st and 22nd May 2011. The drop in temperature resulted in drasticreduction in the weather beating and agricultural loads. Consequently load crash wasexperienced on three consecutive days during morning hours of 20th, 21st and 22nd May 2011.In the Northern Region the major pit head super thermal power stations are located in the Southeastern part while the major snow-fed hydro stations are located in the North-western part of thegrid. The load centre is located in and around the National Capital Region (NCR). In the monthof May the hydro generation is at its peak level. Consequently the direction of power flow isgenerally from South-east towards NCR and from Northwest towards NCR. The angularseparation between the nodes close to the generation and load centre on the day of load crashvis-vis on a typical day in the month of May is shown in the figures 64, 65.Figure 64: Angular separation between Kanpur and DadriPOSOCO Page 76 of 143