摘要
快速短接故障相母线熄弧装置的基本原理是在系统发生单相接地时,迅速在站内将故障相母线金属性接地以限制故障相电压,从而实现熄弧。在配置有快速短接故障相母线熄弧装置的中性点不接地系统中,考虑原故障点消除与原故障点未消除两种情况以及过渡电阻的影响,深入对比分析熄弧装置动作前后故障路径与非故障路径零序电流幅值与相位变化特征差异,结合馈线终端设备,提出利用零序电流幅值比及相位偏移辨识故障路径,实现就地快速故障区段定位,并对定位流程进行设计。利用ATP软件进行不同故障状态下的仿真,仿真结果验证了所提定位方法的正确性。
The basic principle of the arc suppression device adopting fast earthing of faulty phase bus is to quickly ground the faulty phase bus metallically in the substation when single-phase-to-ground fault occurs.The device limits the voltage of the faulty phase and realizes arc suppresion.In the neutral ungrounded system equipped with arc suppression device adopting fast earthing of faulty phase bus,considering the two cases of successful and unsuccessful original fault point clearing as well as the influence of transition resistance,the different changes of the zero sequence current amplitude and phase in fault path and non-fault path are analyzed in depth before and after the operation of arc suppression device.Combined with the feeder terminal unit,the criterion of the zero sequence current amplitude ratio and phase offset is proposed to identify whether this section belongs to the fault path and realize the local fast location of the fault section.The fault location procedure is also designed.ATP software is used to simulate different fault states.The simulation results show that the criterion proposed in this paper can accurately realize fault section location.
作者
齐郑
刁春燕
李鸿毅
齐俊
陈艳波
QI Zheng;DIAO Chunyan;LI Hongyi;QI Jun;CHEN Yanbo(School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China;Information and Communication Company of State Grid Liaoning Electric Power Co.,Ltd.,Shenyang 110006,China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2020年第23期157-164,共8页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(51777067)。
关键词
中性点不接地系统
单相接地故障
快速短接故障相母线熄弧装置
故障区段定位
neutral ungrounded system
single-phase-to-ground fault
arc suppression device adopting fast earthing of faulty phase bus
fault section location
作者简介
齐郑(1977-),男,博士,副教授,主要研究方向:电力系统及其自动化。E-mail:qizheng319@126.com;通信作者:刁春燕(1997-),女,硕士研究生,主要研究方向:电力系统及其自动化。E-mail:18810526320@163.com;李鸿毅(1996-),男,硕士研究生,主要研究方向:电力系统及其自动化。E-mail:1131418115@qq.com。
