电力系统及其自动化学报2019，Vol.31Issue(2)：58-65,8.DOI:10.3969/j.issn.1003-8930.2019.02.010
谐振接地系统单相断线故障分析
Analysis of Single-phase Open Fault for Resonant Grounded System
摘要
Abstract
The number of open faults on distribution lines is increasing year by year;however,simple and effective de?tection methods are scarce. In this paper,based on a resonant grounded system,a model of single-phase open fault is established,which takes into account the location of break points,the ratio of fault line grounding capacitance to sys?tem grounding capacitance,and the magnitude of load impedance. Moreover,the changing characteristic of voltage at neutral point,phase voltages,and line voltages on the supply and load sides are analyzed. Results show that there is a significant difference in the fault phase voltage,but the voltage changes in healthy phases are identical;the line voltag?es on the supply side are almost unchanged,while on the load side,the sum of amplitude of line voltages between the fault phase and two healthy phases is equal to that of the line voltage between two healthy phases,with phases being op?posite or identical. Finally,the theoretical analysis is verified by MATLAB simulation. The research results in this pa?per can provide a theoretical basis for the detection and location of single-phase open fault in the resonant grounded sys?tem.关键词
谐振接地系统/单相断线故障/故障分析/电压特征Key words
resonant grounded system/single-phase open fault/fault analysis/voltage characteristic分类
信息技术与安全科学引用本文复制引用
张洪涛,曹丽丽,冯光,薛永端,周宁,王鹏..谐振接地系统单相断线故障分析[J].电力系统及其自动化学报,2019,31(2):58-65,8.基金项目
国家自然科学基金资助项目(51467010) （51467010）
