谐振接地系统两点间同相接地故障分析  

Between Two Points With Phase Ground Fault Analysis in the Resonant Earthed Neutral System

作　　者：李嘉 白琳琳 翟晓满 Li Jia;Bai Linin;Zhai Xiaoman(China Nuclear Power Engineering Co.,Ltd.,Beijing 100840,China)

机构地区：[1]中国核电工程有限公司,北京100840

出　　处：《智能建筑电气技术》2023年第5期74-78,共5页Electrical Technology of Intelligent Buildings

摘　　要：本文详细分析了中性点经过消弧线圈接地系统中同一相位不同两点发生接地故障的情况,包括发生该故障时故障电流的流向路径,及其等值电路和计算公式。同时,利用MATLAB中可视化仿真工具(Simulink)实现了中性点经消弧线圈接地系统的配电网的动态系统建模,根据短路发生的不同时刻和不同的接地电阻等多种情况,对中性点经消弧线圈接地系统的同相位发生不同两点接地故障进行了仿真。该分析对故障选线以及整定计算工作有一定的参考意义。This paper analyses two points ground fault in the same phase in the resonant earthed neutral system,including fault current distribution,the equivalent circuit and the calculation formula.Meanwhile using Simulink of Matrix Laboratory,the simulation model of distribution network in resonant grounding system is built and simulated considering the multiple factors of different short-circuit moments and different grounding resistance.The analysis is significant to identify the fault line and setting calculation in a certain extent.

关 键 词：中性点经消弧线圈接地系统 同相两点接地故障 MATLAB仿真 故障分析 

分 类 号：TM71[电气工程—电力系统及自动化]