基于WOA-VMD和贝叶斯估计的保护测量回路误差评估  

Error Evaluation for Protection Measurement Circuit Based on WOA-VMD and Bayesian estimation

作　　者：李振兴[1,2] 柳灿 翁汉琍[1,2] 李振华[1,2] 龚世玉 LI Zhenxing;LIU Can;WENG Hanli;LI Zhenhua;GONG Shiyu(Hubei Provincial Collaborative Innovation Center for New Energy Microgrid(China Three Gorges University),Yichang 443002,China;College of Electrical Engineering and New Energy,China Three Gorges University,Yichang 443002,China)

机构地区：[1]新能源微电网湖北省协同创新中心(三峡大学),湖北宜昌443002 [2]三峡大学电气与新能源学院,湖北宜昌443002

出　　处：《三峡大学学报(自然科学版)》2025年第2期97-105,共9页Journal of China Three Gorges University:Natural Sciences

基　　金：国家自然科学基金项目(52077120)。

摘　　要：变电站保护测量回路受测量误差影响,保护灵敏度降低,对于重载线路可能引起保护误动,会造成严重后果.为推动保护测量的状态监视,提出一种基于鲸鱼优化(whale optimization algorithm,WOA)的变分模态分解(variational mode decomposition,VMD)和贝叶斯估计的保护测量回路误差评估方法.针对保护测量回路的电流数据,引入WOA并结合包络熵作为适应度函数确定VMD的关键参数,基于WOA-VMD将原电流数据分解为本征模态;进一步为解决特征数目过多所带来的复杂数据分析问题,引入皮尔逊相关系数方法计算其各组系数优选特征量;最终利用贝叶斯估计法量化分析优选后的特征量信号实现误差判定.实验结果表明,本文的评估方法能够准确监测保护测量回路2%的误差偏移.The protection measurement circuit of the substation is affected by the measurement error,and the protection sensitivity is reduced,which may cause the protection misoperation for the line of heavy load.Thereby,it will cause serious consequences.In order to promote the state monitoring of conservation measurement,a method of protection measurement loop error evaluation based on whale-optimized(WOA)variational mode decomposition(VMD)and Bayesian estimation is proposed in this paper.For the current data of the protection measurement loop,the WOA and the envelope entropy as the fitness function to determine the key parameters of VMD are analyzed based on the WOA-VMD.Furthermore,in order to solve the problem of complex data analysis caused by the excessive features,the method of Pearson correlation coefficient is introduced to calculate the preferred feature quantity of each group and the preferred feature quantity signal by using the Bayesian estimation to realize the error determination.The experiments show that the proposed evaluation method can accurately monitor the error offset of 2%in the protection measurement loop.

关 键 词：保护测量回路 误差评估 鲸鱼优化算法 包络熵 皮尔逊相关系数 贝叶斯估计法 

分 类 号：TM77[电气工程—电力系统及自动化]