The Security Control For Transmission Section Based On WAMS

The significance of protecting transmission section is pointed after the analysis on the cause of cascading overload trip, and the scheme of security control based on wide area measurement system (WAMS). If the trip of overload branch may cause cascading trip in corresponding section,emergency overload control,such as fast closing air gate and deloading, should be executed to ensure the security of the transmission section.The principal component analysis combined importance weight is used to evaluate control nodes'comprehensive capability to alleviate overload on the section,and determine the operation sequence of control nodes.The choice of control nod e an d its quantity ensures that normal branch won't overload and the power flow of overload branch won't arise,so it doesn't need calculate A.C power flow,and can give the control strategy quickly.The rapidity and validity of proposed algorithm is verified by the calculation result of CEPRI 36test system.