基于误差状态模糊分析的电容式电压互感器内绝缘状态评价方法  

Internal insulation condition evaluation method for capacitor voltage transformer based on fuzzy analysis of error condition

作　　者：王欢 王忠东[2] 卢树峰 陆子刚 刘俭 WANG Huan;WANG Zhongdong;LU Shufeng;LU Zigang;LIU Jian(Wuhan Branch,China Electric Power Research Institute,Wuhan 430074,China.;Marketing Service Center,State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 210019,China.;Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]中国电力科学研究院有限公司武汉分院,武汉430074 [2]国网江苏省电力有限公司营销服务中心,南京210019 [3]华中科技大学,武汉430074

出　　处：《电测与仪表》2024年第4期73-80,共8页Electrical Measurement & Instrumentation

基　　金：国家电网有限公司科技项目(5600-201918181A-0-0-00)。

摘　　要：电容式电压互感器(CVT)的内绝缘状态是保证其计量准确性和运行稳定性的关键因素。然而,在长期运行过程中,电老化、热老化以及系统过电压等因素会导致CVT的内绝缘状态出现劣化。针对此问题,文中提出了一种数据驱动的CVT内绝缘状态评价方法。该方法利用高压CVT群体之间的电气连接关系构建CVT误差状态的特征参量,基于CVT误差状态与内绝缘状态的相关性,通过模糊分析方法匹配CVT的误差状态与内绝缘状态,实现了在线评价CVT异常内绝缘状态的异常程度和异常类型。The internal insulation condition of capacitor voltage transformer(CVT)is a key factor to ensure its measurement accuracy and operation stability.However,during the long-term operation,the internal insulation condition of CVT would be degraded by electrical aging,thermal aging and system overvoltage.Aiming at this problem,a data-driven CVT internal insulation condition evolution method is proposed in this paper.This method constructs the feature parameters of error condition based on the electrical connection relationship between the high-voltage CVT groups,and the fuzzy analysis is utilized to match the internal insulation condition and error condition of CVTs according to their correlations,therefore,the degree and type of CVT abnormal internal insulation could be evaluated online.

关 键 词：电容式电压互感器 误差状态 内绝缘状态 模糊分析 

分 类 号：TM451[电气工程—电器]