中性点接地方式对含分布式电源配网单相接地故障特性的影响分析  

Analysis of the Influence of the Neutral Grounding Method on the Characteristics of the Single-Phase Grounding Fault of the Distribution Network with DG

作　　者：魏巍 张博 胡国洪 曾洪亮 李勃 邹亚琴 WEI Wei;ZHANG Bo;HU Guohong;ZENG Hongliang;LI Bo;ZOU Yaqin(Pengshui Power Supply Branch of State Grid Chongqing Electric Power Company,Chongqing 409600,P.R.China;School of Electrical and Electronic Engineering of Chongqing University of Technology,Chongqing 400054,P.R.China)

机构地区：[1]国网重庆市电力公司彭水供电分公司,重庆409600 [2]重庆理工大学电气与电子工程学院,重庆400054

出　　处：《重庆电力高等专科学校学报》2019年第6期8-12,共5页Journal of Chongqing Electric Power College

基　　金：适应分布式电源接入的地区配网故障处置技术研究（2019渝电科技自61#）

摘　　要：对分布式电源接入重庆市渝东南地区10 kV配网时出现的单相接地故障进行分析,探讨了在不同配网侧与分布式电源侧中性点接地配合方式的情况下,故障电流的幅值及其分配情况。仿真结果显示,配网侧接地方式变化对单相接地故障电流影响较小,主要体现在故障电流幅值变化;而分布式电源侧接地方式变化在引起故障电流幅值变化的同时也会影响其分布情况,给继电保护的整定带来困难。This paper analyzes the single-phase grounding fault of the 10kV distribution network with DG in southeast Chongqing.Besides,it discusses about the amplitudes and distributions of the fault current with different coordinated grounding modes of the neutral point on different different distribution network and DG sides.The simulation results show that changes in the grounding mode on the distribution network side have a less influence on the single-phase grounding fault current and it is reflected in amplitude changes of the fault current.However,changes in the grounding mode on the DG side affect not only the amplitude but also its distribution and make the setting of replay protection difficult.

关 键 词：分布式电源 单线接地 消弧线圈 故障电流 

分 类 号：TM743[电气工程—电力系统及自动化]