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Overview of Generator Out-of-Step Prediction

With the development of power system, the main unit is gradually becoming larger and larger, thus length of time that large generators after experiencing disturbances in power grid needed to adjust and maintain the stability is more important than ever. Generator out-of-step prediction which is a part of security and automaticity equipment of power system, sends out the corresponding operation instructions in order to keep the whole system stay stability, according to the initial system state and fault severity. The paper analyzes and classifies several schemes and principles on generator out-of-step prediction. The actual advantages and disadvantages are pointed out. At last, the development of out-of-step prediction is also presented.