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Fast transient stability simulation based on PMU

LIU Xindong JIANG Quanyuan CAO Yijia (College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)  
According to the multi-time scale character of power system and based on the CSP(Computational Singular Perturbation) theory,the operation mode of system state variables is divided into fast dynamic component and slow dynamic component.As the fast component always decays to a stable value first,it could be decoupled from the slow one using equivalent transform and its CSP be calculated according to its multi-time scale character.The exhausting fast dynamic component is ignored gradually in the process of numerical integral,making the stiff equation non-stiff.The simulation step is increased at the same time to shorten the simulation time and improve the efficiency.Simulation result shows its effectiveness and practi- cability,with efficiency increase of 20.6%.
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