摘要
为解决小电流系统行波故障选线现场应用问题,提出了一种基于单相电流行波的故障选线原理:不管是故障相还是非故障相,故障线路单相接地故障相电流初始行波远大于非故障线路,且故障线路行波与非故障线路行波极性相反。该故障选线方法既不需要配备专用的零序电流互感器,也能克服两相或多相电流行波选线现场接线复杂且易于出错的不足;既能够满足电缆出线小电流系统的选线需要,也能满足架空出线系统的选线需要。仿真实验结果表明:所提方法是正确可行的。
The paper presents a novel fault line selection using single-phase current traveling wave after analyzing each phase current traveling wave of fault line and sound lines generated by single-phase-to-ground fault. Whether the phase is faulted phase or sound phase, single-phase-to-ground fault generated current traveling wave in faulted line is much higher than the wave in sound line, and the polarity is reverse. The method works well without special zero-sequence current transducer and is easy to be implemented in the field with simple wiring compared with two-phase or three-phase current traveling wave methods, And the method tan not only be applied to cable lines but also overhead lines. Simulation results show that the method is correct and available.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2008年第14期13-16,共4页
Power System Protection and Control
基金
国家自然科学基金资助项目(50377019)
关键词
故障选线
电流行波
fault line selection
current traveling wave
作者简介
施慎行（1978-），男，博士，研究方向为电力系统行波故障分析及继电保护；E-mail：ssx99@mails．tsinghua．edu．cn
董新洲（1963-），男，教授，研究方向为行波测距、行波保护、无通道保护以及小波分析在电力系统中的应用。
