基于场路模型的500 kV变电站母线避雷器杂散电容干扰电流的计算  

Calculation of Stray Capacitance Interference Current of Busbar Arrester in 500 kV Substation Based on Field Circuit Model

作　　者：姚勇[1] 王建[2] 顾德文[1] 甘艳[1] 马志伟 杜志叶[2] 阮江军[2] YAO Yong;WANG Jian;GU Dewen;GAN Yan;MA Zhiwei;DU Zhiye;RUAN Jlangjun(Central China Grid Company Limited,Wuhan 430000,China;School of Electrical Engineering,Wuhan University,Wuhan 430072,China)

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

出　　处：《电瓷避雷器》2018年第5期59-64,共6页Insulators and Surge Arresters

摘　　要：高压避雷器周围带电设备以及避雷器自身构成的多电位导体系统,存在复杂的部分电容电流干扰,目前在线监测技术对部分电容电流干扰还未充分考虑和去除,无法准确测得泄漏电流中的阻性分量。使得阻性电流测量值不能真实反映避雷器的性能状况,难以发现设备的早期故障。基于有限元软件仿真计算某典型500 kV变电站母线避雷器自身及周围带电设备的部分电容,采用Matlab Simulink建立阻容网络模型,仿真计算得到变电站内考虑双母线、前后相邻带电设备时三相避雷器各相的全电流和相角。仿真结果与现场的全电流监测数据对比,趋势一致,是一种计算杂散电容干扰电流有工程参考价值的方法。Multi-potential conductor system of high voltage arrester lightning arrester and its peripheral equipment which is part of the capacitive current complex interference,the on-line monitoring technology on the part of the capacitive current interference has not been fully considered and removed,it cannot be accurately measured leakage resistance current in component. The measured value of the resistive current can not reflect the performance of the arrester,and it is difficult to find the early fault of the equipment.The partial capacitance calculation of a typical 500 kV substation bus arrester and its surrounding electric equipment simulation based on finite element software,using Matlab Simulink to establish the RC network model,simulation calculation of substation considering double bus,adjacent electrified equipment when three-phase arrester of each phase current and phase angle. The comparison of the simulation results with the total current monitoring data in the field is consistent,and It is a method with reference value for engineering to calculate the interference current of stray capacitance.

关 键 词：氧化锌避雷器 场路模型仿真 阻容网络 干扰电流 阻性电流 

分 类 号：TM862[电气工程—高电压与绝缘技术]