基于零序电流变化特征值和消弧线圈分散补偿的接地故障选线方法
摘要:为了更好地解决消弧线圈分散补偿接地系统的接地选线问题，提出一种基于零序电流变化特征值的故障选线方法。首先，通过开关控制主消弧线圈的投切，正常运行时主消弧线圈为接入状态，系统收到单相接地故障报警信号后断开开关使主消弧线圈短时退出运行然后再闭合；其次，采集主消弧线圈断开前后各线路的零序电流信号，计算各线路在主消弧线圈退出运行前后的零序电流变化特征值并进行整化，从而识别故障线路；最后，在Matlab环境下建立仿真模型，考虑不同故障点、过渡电阻和消弧线圈补偿度等因素的影响，结合工程实际的适用性，对不同的消弧线圈分散补偿接地系统进行仿真分析，大量仿真表明了该选线方法的正确性和可行性。
Abstract：In order to improve the accuracy of the fault line selection of the arc suppression coil dispersion compensation grounding system, a new method of single-phase-to-ground line selection for arc suppression coil decentralized compensation grounding system is proposed based on the difference of zero sequence current variation eigenvalue between the fault line and non-fault line. The switch controls the casting and cutting of main arc suppression coil, the switch is closed in the normal state, and the switch is open in a short time and then closed after the system received a single-phase ground fault alarm signal. The fault line is identified by collecting the zero sequence current signal of each line before and after the main arc extinguishing coil is disconnected and comparing the zero sequence current variation characteristic value before and after the main arc extinguishing coil is exhausted. The simulation model is established by Matlab, and the influence of different fault points, transition resistance, arc suppression coil compensation degree and the practical applicability of the project is considered. The simulation results show that the method is correct and feasible.
标题：基于零序电流变化特征值和消弧线圈分散补偿的接地故障选线方法
title:Ground Fault Line Selection Based on Zero Sequence Current Variation Eigenvalue and Arc Suppression Coil Distributed Compensation
作者：林海,黄莹雪,秦忠明,任向阳
authors:LIN Hai,HUANG Yingxue,QIN Zhongming,REN Xiangyang
关键词：消弧线圈,分散补偿,零序电流变化特征值,单相接地故障,选线方法,
keywords:arc-extinguish coil,decentralized compensation,characteristic value of zero sequence current change,single-phase ground fault,line selection method,
发表日期：2021-01-04
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