广东省网EMS中状态估计可观测分析方法

介绍了成功应用于广东省网EMS状态估计中的可观测分析方法。该方法建立在快速解耦状态估计中雅可比矩阵运算可观测性分析原理基础上，以逻辑方法模拟雅可比矩阵消元可观测分析过程，把节点注入型量测转化为支路型潮流量测，能快速、准确地判断系统是否整体可观测。对于系统中不可观测部分以增加必要的注入伪量测形式使之观测，保证状态估计在各种量测条件下正常运行。文中所提算法直接对量测进行处理，分析直观，在广东省网实际应用中，取得较好效果，经多次测试和实际运行检验，其结果准确、可靠。

A PRACTICAL OBSERVABILITY ANALYSIS ALGORITHM FOR STATE ESTIMATION IN EMS OF GUANGDONG POWER SYSTEM

Based on the theory of observability analysis of Jacobian matrix calculation in fastdecoupled state estimation,a new algorithm for observability analysis in state estimation in EMS for Guangdong Power System is presented in this paper.The algorithm uses the logic method to simulate the process of eliminating elements of Jacobian matrix in state estim ation,and transforms the node injection measurements into the measurements of branches,thus the determination whether the whole system is observable can be quickly and exactly m ade.The pseudo m easurem ents are added to unobservable parts to make the whole system observable.The practical application in Guangdong Power System shows the algorithm is feasible and effective.