基于改进Hampel抗差法的电网谐波状态估计  

Electric power network harmonic state estimation based on improved Hampel robust estimation

作　　者：张思为[1] 牛胜锁[1] 梁志瑞[1] 季冰[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,河北保定071003

出　　处：《黑龙江电力》2012年第5期372-375,共4页Heilongjiang Electric Power

摘　　要：针对电网谐波状态的估计问题,分析了量测粗差对于估计结果的影响,建立了考虑粗差辨识的谐波状态估计数学模型,应用Hampel抗差法对量测数据进行了辨识分类,并根据谐波状态估计的特点对算法的阈值函数进行了改进,有效地解决了"残差污染"和"残差淹没"问题。仿真计算及分析结果表明,求解谐波状态估计问题时,改进Hampel抗差法能有效抑制粗差对估计结果的影响,提高了估计精度。Aiming at the problems of electric power network harmonic state estimation, this paper analyzes the influ- ence of gross measurement error on estimation, establishes the mathematical model of electric power network har- monic state estimation taking gross error identification into consideration, identifies and classifies the measured data by the application of Hampel robust estimation and improves the threshold function based on the characteristics of e- lectric power network harmonic state estimation, which solves ＂residual pollution＂ and ＂residual submersion＂. Sim- ulated calculation and analysis shows that, to estimate harmonic state, the improved Hampel robust estimation can restrain the influence of gross error on estimation, which enhances the estimation accuracy.

关 键 词：谐波状态估计 量测粗差 改进Hampel抗差法 阈值函数 

分 类 号：TM930.1[电气工程—电力电子与电力传动]