Power System Emergency Control Based on Load Stratification

Because of the Aug. 14 blackout in the U.S. and Canada, the subject of maintaining grid security and stabilization after great disturbance increasingly becomes the focus of power companies all around the world. Power system emergency control is the conventional method for maintaining transient stabilization of power grid while disturbance occurs. The emergency control based on load stratification is advanced. Comparing with normal low frequency load/generator shedding,, the theory of load stratification provides the fast creating of control strategy table on stratified load or generator, and the expressions of power balance protection provides rapid calculating on the real value of load/generator shedding. The result of simulation shows that the principle of emergency load control is effective.