Research on Transient Stability Analysis Method of Power System Based on Network Structure Preserving Energy Function

With widespread application of renewable energy generation and power electronic equipment in power system, the uncertainty of power system is rapidly increasing. The event-based security and stability control method is increasingly hard to guarantee the secure operation of the power system. Based on the idea of energy function method, a method which could analyze the transient stability only using power system on-fault data was proposed. First, the network structure preserving energy function was built, and the transient energy of power system could be calculated in real time. Then a long-short term memory network was trained and the critical energy could be estimated in real time. Finally the stability margin of power system was obtained with the comparation of transient energy and critical energy. The simulation on New England 10 machine system confirms the rapidity and accuracy of the proposed method. © 2020 Chin. Soc. for Elec. Eng.