M估计方法及其在电力系统状态估计中的应用

针对ＱＬ及ＱＣ估计的缺点,提出了一种新的电力系统稳健估计方法。在此基础上,利用残差灵敏度矩阵,提出了减少残差屏蔽效应的措施。分析表明,新方法可以结合现有常规状态估计方法。计算上易于实现且速度较快,在一定程度上克服了残差屏蔽效应。

M-ESTIMATION AND ITS APPLICATION IN POWER SYSTEM STATE ESTIMATION

In view of the disadvantages of QL and QC estimation, a new power system robust estimation method based on M estimation is presented. On the basis of this method, applying residual sensitivity matrix, a measure that can reduce residual masking effect is presented. Simulation result shows that this new method can be well combined with the conven tional method. The calculation is simple and fast. It can overcome residual masking effect to some extent.