基于移动窗加权PCA的CVT误差评估方法  

CVT Error Evaluation Method Based on Moving Window Weighted PCA

作　　者：王欢 张淞珲 姜春阳 刘涛 WANG Huan;ZHANG Song-hui;JIANG Chun-yang;LIU Tao(China Electric Power Research Institute,Wuhuan Hubei 430074,China;State Grid Shandong Electric Power Company Marketing Service Center(Metrology Center),Jinan Shandong 250000,China)

机构地区：[1]中国电力科学研究院有限公司,湖北武汉430074 [2]国网山东省电力公司营销服务中心(计量中心),山东济南250000

出　　处：《计算机仿真》2024年第8期84-87,149,共5页Computer Simulation

基　　金：国网科技项目(5400-202116474A-0-5-ZN)。

摘　　要：电容式电压互感器(CVT)是电力系统中重要的计量装置,传统的主元分析法(PCA)在进行CVT的误差评估时具有一定的局限性,为了更加准确地对CVT进行误差评估,提出一种基于移动窗加权PCA的自适应评估方法。方法融合了移动窗PCA和指数加权PCA的思想,能够自适应更新评估模型,实现对CVT的状态评估。相较传统主元分析法,移动窗加权PCA方法具备更好的适应性,可以有效识别突变误差和渐变误差,更适用于长期运行的CVT。Capacitive voltage transformer is an important metering device in power system,the traditional principal element analysis method has certain limitations in the error evaluation of CVT.In order to evaluate the error of CVT more accurately,this paper proposes an adaptive evaluation method based on moving window weighted PCA.This method integrates the ideas of moving window PCA and exponentially weighted PCA,and can adaptively update the evaluation model to realize the state evaluation of CVT.Compared with the traditional principal element analysis method,the moving window weighted PCA method has better adaptability,can effectively identify mutation error and gradient error,and is more suitable for long-term CVT.

关 键 词：互感器 主元分析法 加权因子 移动窗 

分 类 号：T301.6[一般工业技术]