Study On Algorithm Of Power System State Estimation And The Realization Of Program

There exists mistake or error in power system measuring system. To provideaccurate system status, it is necessary to carry out state estimation.Bad data detection and identification in state estimation are mainly discussed in thispaper. Object-oriented technology, sparse matrix technology and node optimizationtechnology are adopted to realize the fast decoupled state estimation method throughprogramming.With the large potential of wide area measurement system application in powersystem, three methods of using wide area measuring results in state estimation arediscussed, which are state estimation with phasor measuring points as unknownquantities, state estimation with phasor measuring points as known quantities, stateestimation through separating large system into small system based on the PMU. Thedetection and estimation identification method of measuring quantity abrupt change inbad data detection and identification is also introduced in this paper.