电力系统状态估计在抚顺电网中的应用与研究

Application and study of state estimation in Fushun power system

介绍了地区电网状态估计的基本原理及功能 ,即利用实时量测系统的冗余度提高数据精度 ,从而自动排除错误信息 ,估计出系统的状态 ;在算法上采用基于等效电流量测变换的状态估计方法 ,使雅可比矩阵常数化 ,充分利用了系统量测类型多的特点 ,将量测支路电流作为已知量带入计算 ,使其具有较好的数值稳定性和计算速度 ;分析了在实时不良数据冲击下 ,该算法的稳定性和收敛性 ;在抚顺电网实际运行中效果良好。

The fundamental principle and function of state estimation in district power system is described.It uses the redundancy of real time measurement system to improve data accuracy,then to reject error information and estimate system states.The algorithm is based on the state estimation method of the variety of equivalent current measurement,which fixes Jacobi matrix and makes a full use of different measurement types of power system.Taking the line current measurements as parameters known in calculation,it has a good computed value stability and computing speed.The stability and constringency of the algorithm under the impact of bad data is analyzed.The algorithm is used in Fushun power system with good effect.