分布参数模型在煤矿配电网故障测距中的应用

Application of Distributed Parameter Model in Fault Ranging of Distribution Network in Coal Mine

针对目前配电网单相接地时,其故障点人工巡查存在困难的问题,提出了一种基于分析参数模型的新故障测距和定位方法。依据对配电网实时监控,通过馈线终端进行故障数据和信息的传输,并对其数据和信息进行准确的分析计算,再根据具体的计算结果选定一段故障区,计算出该区域的分布参数,从而能准确推算出故障距离。根据仿真结果显示,配电网的故障位置及过渡电阻对分布参数模型的计算结果影响较小。这表明分布参数模型的测距和定位方法能够对区段和故障选线进行准确定位,且误差不超过1%,具有较高的应用价值。

A new fault ranging and location method based on analytical parameter model has been proposed to solve the problem of manual inspection of fault points in single-phase grounding of distribution network.According to the real-time monitoring of the distribution network,the transmission of fault data and information has been carried out through the feeder terminal,and its data and information have been accurately analyzed and calculated.Then,according to the specific calculation results,a section of fault area has been selected,and the distribution parameters of the area have been calculated,so that the fault distance can be accurately calculated.According to the simulation results,the fault location and transition resistance of the distribution network have little influence on the calculation results of the distributed parameter model,which can show that the ranging and location method of the distributed parameter model can accurately locate the section location and fault line selection,and the error is less than 1%,which has high application value.