【作者】 于盛楠；

【导师】 鲍海；

【作者基本信息】 华北电力大学（北京） ， 电力系统及其自动化， 2007， 硕士

【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,提出了对配电网单相接地故障进行故障定位的实用方法。该方法分两步进行。第一步基于C型行波定位理论定出故障距离:在线路始端注入高幅值窄脉冲,使用高采样率采集装置在始端接收返回波形,比较进行自适应滤波提纯信号后的正常和故障两种情况下的波形,再使用隔点差分的方法加大数据突变差异,从而确定行波在线路始端和故障点之间返回所用的时间,在较短时间内计算出故障距离。第二步定出故障分支:通过分析行波在带分支线路中的传输过程,提出行波传输的特征波的概念,以及确定简单配电网络的拓扑结构的方法。通过分析故障录波的特征波,来确定故障分支。将故障测距和故障定分支结果结合起来达到精确定位。通过理论分析、ATP仿真、实验室模块实验及现场实验,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。更多还原

【Abstract】 To automate fault location in distribution networks and reduce line inspection workload and blackout period, a method for single-phase to ground fault in distribution network is brought out. There are two steps in this method. The first step is fault distance determination. Based on the theory of C-type traveling-wave fault location, and via injecting a signal with high voltage and narrow pulse, waveforms back from the lines are monitored. After comparing the normal and fault waveforms extracted by adaptive filter and differencing, the interval between the beginning end and the fault point is determined. Thus the fault distance can be calculated. The second step is fault branch determination. The definition of feature-waveform in traveling-wave and a method to confirm the structure of simple distribution network is brought out. Fault branch is fixed after analysis to the feature-wave of fault waveform. The results of the two steps make fault location accurately. After theory, ATP simulation, experiments both in lab and on spot, and effectively data analysis, this method is proved correct, as well as its practicality.更多还原