摘要
为解决配电网故障定位问题,使配电网故障定位自动化,以减少巡线工作量和用户停电时间,提出了利用C型行波法对单相接地故障进行故障测距的方法。该方法基于C型行波定位理论,通过在线路始端注入一高幅值脉冲,使用高采样率采集装置在始端接收返回波形,再选取适当的滤波器进行数字滤波滤除噪声提纯有用信号,并使用隔点差分的方法确定行波在线路始端和故障点之间返回所用的时间,从而在较短时间内计算出故障距离。同时,通过分析行波在带分支线路中的传输过程,提出了确定简单配电网络的拓扑结构的方法。经过理论分析、ATP仿真及实验室模拟实验,并对所得数据进行有效分析,证明了该方法的正确性,也说明该方法在配电网故障定位中是实际可行的。
To solve the problem of the fault location in distribution networks, a fault location method is suggested for the single-phase grounding fault based on C-type travelingwave theory. This method aims to realize the automation, and to reduce line inspection workload and customer blackout period. The back waves from the lines are monitored by injecting signals with high voltage and narrow pulse. The waveforms are extracted with proper filter. After filtering, the interval of the traveling-wave between the beginning end of the line and the fault point is calculated. The fault distance is calculated. Through the analysis of the transmission process of injected traveling-wave on lines with branches, the method of structure confirmation in simple distribution network and fault location is proposed. Through the simulation in ATP and experiments on analog lines in lab, the scheme is proved to be correct through technological analysis.
出处
《现代电力》
2007年第3期20-23,共4页
Modern Electric Power
关键词
行波
分支线路
信号衰减
高速采集
滤波差分
traveling-wave
branch lines
signal fading
high rate picking
difference of filter waves
