Fast generation shedding equipment based on the observation of swings of generators

A novel method and recently developed stabilizing equipment to prevent the loss of synchronism of generators in pumped-storage plants due to spreading are presented. The method includes functions to estimate the swing of each generator by using online generator output sampled 600 times per second after an occurrence of a disturbance (such as a fault, faulty equipment, etc). Generator swing 200-300 milliseconds ahead and loss of synchronism between generators in pumped-storage plants and those in thermal and nuclear plants can be predicted 200-300 ms ahead, and the number of generators that must be shed to maintain stability can be decided.>