Appling Study On Distributed State Estimation Of Power Systems

The state estimation of the power system is an important component of the energy management system (EMS), especially playing an even more important role in the electric market environment. The theory of state estimation in power system had been established in the early of the 1970s, and was improving constantly in the last ten years. But the state estimation of the power system still has a lot of fields that worth further studying.On the base of analyzing the classical methods of power system state estimation, the weighted least squares method is improved, and a new algorithm which is suitable for distributed state estimation and is able to meet the needs of engineering calculations is proposed. Then, the model of distributed state estimation is established, and a distributed state monitoring system is designed, and the coordination parallel algorithm principle and flow of distributed state estimation is discussed. This algorithm is simulated by IEEE 14 system. At last, the application of distributed state estimation to the Western Power Grid of Inner Mongolia is introduced.