多分支配电网故障定位方法研究与模拟试验

Research and simulation test on fault location method for multi-branch distribution network

针对配电网拓扑结构复杂、分支众多导致当前行波故障测距成本不断攀升的问题开展研究,改变配电网内分支线路处行波测距装置配置方案,对无测距装置配置的分支提出双端-线零模波速差故障测距方法,实现单相故障定位的全覆盖。利用实物电路元件构建配电网模型,在单相故障的模拟实验中使用高速数据采集卡实际提取模量行波波形并计算模量行波波速,进一步贴合生产实际。试验与计算结果表明,本方法测距精度高,稳定性强,使测距成本明显降低,具有实际推广意义。

Aiming at the problems such as the complex topology structure and many branches of the distribution network lead to the `rising cost of the current traveling wave fault location,the configuration scheme of the traveling wave fault location device on the branch line in the distribution network is changed,and the double-end-line zero-mode wave velocity difference fault location method is proposed for the branch without the configuration of the fault location device to realize the full coverage of the single-phase fault location.The distribution network model is constructed by using physical circuit components.In the simulation experiment of single-phase fault,the high-speed data acquisition card is used to extract the waveform of the modulus traveling wave and calculate the modulus traveling wave velocity,which is further in line with the actual production.The test and calculation results show that this method has high ranging accuracy and strong stability,which significantly reduces the fault location cost and has practical significance.