暂态信号特征分量在配网小电流接地选线中的应用  

Application of Characteristic Components of Transient Signal in Grounded Wire Detection of Ineffectively Earthed Distribution Systems

作　　者：王伟[1] 焦彦军[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北省保定市071003

出　　处：《电网技术》2008年第4期96-100,共5页Power System Technology

摘　　要：研究了小电流接地系统发生单相接地故障后的暂态信号及其暂态特性,根据线路分布参数的故障模量模型分析了不同接地方式下零序网络的电气量分布规律。介绍了4种基于暂态信号特征分量的选线方法,对不同工况的单相接地故障进行了仿真,比较了各选线方法的性能。仿真结果表明各选线方法受消弧线圈的影响很小。The transient signal and its transient characteristic of ineffectively earthed distribution system are researched while single-phase earth fault occurs in it. According to the fault modulus model of distributed parameters of transmission line, the distribution law of electric quantities of zero-sequence network is analyzed. Based on the characteristic component of transient signal, four fault line detection methods are presented in this paper and the single-phase earth faults under different operating conditions are simulated; the performances of different fault line detection methods are compared. Simulation results show that the presented fault line detection methods are valid and they are slightly impacted by the Perterson coil.

关 键 词：特征分量 相模变换 零序电流 暂态无功功率 谐振 

分 类 号：TM771[电气工程—电力系统及自动化]