基于阻容网络的避雷器三相耦合干扰电流向量补偿法  

Vector Compensation Method of Three Phase Coupling Interference Current for Surge Arrester Based on RC Network

作　　者：王建[1] 杜志叶[1] 邹建明[2] 马志伟 谢一鸣 阮江军[1] WANG Jian;DU Zhiye;ZOU Jianming;MA Zhiwei;XIE Yiming;RUAN Jiangjun(School of Electrical Engineering,Wuhan University,Wuhan 430072,China;Central China Grid Company Limited,Wuhan 430000,China)

机构地区：[1]武汉大学电气工程学院,武汉430072 [2]华中电网有限公司,武汉430000

出　　处：《电瓷避雷器》2020年第2期125-130,共6页Insulators and Surge Arresters

摘　　要：随着我国电力事业的发展,电压等级不断提高,避雷器结构更复杂,相间与相邻带电设备的耦合电容干扰也变得难以分析计算。采用补偿法的LCD-4型泄漏电流检测仪及其带移相器的改进型号在现场的应用有一定局限性。为分析计算高压避雷器的耦合电容干扰,准确诊断各种结构和配置形式下的避雷器状态,提出一种避雷器三相耦合电容电流向量补偿方案。基于阻容网络理论,采用场路仿真结合方法,清晰地分析计算避雷器三相的耦合干扰,并提取对应避雷器各相的耦合干扰向量。通过预设故障仿真,证明避雷器三相泄漏电流监测数据经过耦合干扰向量补偿后,再计算的泄漏电流阻性分量与真实值更接近。With the development of electric power industry in China,the voltage level is increasing,the structure of the arrester is more complex,and the coupling capacitance interference between each other and the adjacent charged equipment has become difficult to analyze and calculate.The LCD-4 type leakage current detector with compensation method and its improved model with phase shifter have some limitations in the field.In order to analyze and calculate the coupling capacitance interference of high voltage lightning arrester and accurately diagnose the state of various structure and configuration type of lightning arrester,a three-phase coupling capacitance current vector compensation scheme for lightning arrester is proposed.Based on the theory of resistance capacitance network,the coupling interference of the three-phase lightning arrester is clearly analyzed by the method of field road simulation,and the coupled interference vectors of the corresponding arresters are extracted.By the presupposed fault simulation,it is proved that the three-phase leakage current monitoring data of the lightning arrester are compensated by the coupled interference vector,and the calculated leakage current resistance component is closer to the real value.

关 键 词：氧化锌避雷器 状态诊断 补偿法 耦合电容干扰 干扰电流向量 

分 类 号：TM862[电气工程—高电压与绝缘技术]