基于AMI的配网分层状态估计及伪量测生成方法

For the new type of measurement brought by Advanced Metering Infrastructure, a revised method of state estimation for smart distribution system is proposed in this paper. In this method, the network is decomposed into layers by boundary nodes which are AMI measurement nodes and then topology can be decoupled into several subsystems so that parallel computation is available. Then based on decoupled subsystem, a method for calculating load pseudo measurement by load distribution coefficient forecasting is proposed. Finally, the method is testing on IEEE33-bus system which is set five AMI measurement nodes. The result of analysis shows that, compared with traditional method for distribution system state estimation, the layered method is proved to have advantages of faster computation speed and high accuracy; the accuracy of load pseudo measurement produced by the method in this paper is better by the one produced by load forecasting.