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Today’s LiveWire Spotlight is on FERC’s recent announcement accepting the output of NERC Project 2007-01 “Underfrequency Load Shedding” (UFLS). The project team has developed a unified design approach to UFLS protection where Planning Coordinators – not Regional Entities – analyze and identify portions of the BES which may detach under out-of-tolerance conditions (islanding).

Both UFLS Standards will take effect in the U.S. on 10/1/2013 excluding PRC-006-1 requirements R4.1 thru R4.5. Those become mandatory one year after generator data is received in accordance with PRC-024-1.