中性点经消弧线圈并联中值电阻接地方式的研究  

Study on Grounding Mode of Neutral Point through Arc Suppression Coil in Parallel with Median Resistance

作　　者：叶远波 汪胜和 黄太贵 魏立新[2] YE Yuanbo;WANG Shenghe;HUANG Taigui;WEI Lixin(State Grid Anhui Electric Power Co.,Ltd.,Hefei 230022;Sieyuan Electric Co.,Ltd.,Shanghai 201108)

机构地区：[1]国网安徽省电力有限公司,合肥230022 [2]思源电气股份有限公司,上海201108

出　　处：《电气工程学报》2021年第4期159-165,共7页Journal of Electrical Engineering

基　　金：国家电网公司科技资助项目(52120018004L)。

摘　　要：针对传统中性点接地方式容易导致过补偿和欠补偿问题,接地故障定位误差较大的问题,设计出一种新型中性点接地方式,通过有源消弧技术并联中值电阻的方式解决故障电流过补偿和欠补偿问题,利用加权多源点最短路径算法(Floyd算法)进行单相接地故障定位,能够对多条输电线路同时进行故障定位处理。通过对比验证分析,比较三种不同接地方式的最大故障电流曲线和误差分析曲线,发现所提方法在故障电流处理最稳定,故障电流只在15~20 A之间,而且故障定位误差率最高不到3%,从而验证了所提接地方式性能的优越性,证明了本设计方案的可行性。The traditional neutral grounding method is easy to lead to over-compensation and under-compensation,and the location error of grounding fault is large.A new neutral grounding method is designed to solve the problem of over-compensation and under-compensation of fault current by using active arc suppression technique and parallel connection of median resistance,single-phase-to-ground fault location based on the weighted multi-source shortest path algorithm(Floyd algorithm)can be used for fault location of multiple transmission lines.Finally,by comparing the maximum fault current curve and error analysis curve of three different grounding modes,it is found that the fault current of the proposed method is the most stable,and the fault current is only between 15 A and 20 A,the maximum error rate of fault location is less than 3%,which proves the superiority of the grounding mode and the feasibility of the design.

关 键 词：有源消弧技术 并联中值电阻接地方式 Floyd故障定位算法 

分 类 号：TM475[电气工程—电器]