An improved power system state estimation method of hybrid measurement

In the light of the characteristics that at presenting the power system PMU is allocated less,SCADA is assembled more and technology about SCADA is mature,a power system state estimation method is adopted to merge PMU measurement data and SCADA data,two models about hybrid measurement state estimation are expounded,hybrid non-linear state estimation model and WAMS equivalent linear system state estimation methods are analyzed.Real-time state estimation algorithm about SCADA/PMU hybrid measurement system based on a Ward equivalent method is brought up,and the algorithm is studied on simulation and test based on MATLAB network simulation software.Advantages about the algorithm are shown clearly.