矿井10kV电网单相接地故障定位的研究

Research of Single-phase Grounding Fault Location of Underground 10 kV Distribution Network

针对现有故障定位方法中所测的工频故障电流微弱与电弧不稳定等问题,提出了一种基于参数识别的故障定位新方法。该方法采用集中参数的Γ模型建立单相接地故障的故障点定位时域方程,并利用暂态时域信息通过最小二乘优化算法来识别出故障点位置。EMTP仿真实验结果验证了在不同故障条件下该方法的准确性。

In view of problems that measured fault current of power frequency by existing fault location methods is weak and electric arc is unstable,a new fault location method based on parameter identification was put forward.The method uses lumped parameter Γ model to established fault point location time domain equations of single phase grounding fault,and uses transient time domain information to identify fault point position through the least squares optimization algorithm.EMTP simulation results validated accuracy of the method under different fault conditions.