基于时间反演技术的电力电缆单相接地故障测距方法

提出了一种基于时间反演技术的电力电缆单相接地故障测距新方法，当电力电缆发生单相接地故障时，利用电压波动方程时间反演的对称性，将在线路终端采集到的时域电压波反演成等效电流行波并传回输电线路，计算出各假定故障点的电流能量值，根据时间反演的时间-空间同步聚焦特性，确定故障点到线路终端的距离。Matlab仿真验证表明，该方法能够准确有效地实现电力电缆单相接地的故障测距，不但适用于不同过渡电阻的接地故障，而且具有收敛速度快，测距精度高等优点。

Single-Phase Grounding Fault Location Method for Power Cable Based on Time-Reversal Technology

This paper proposed a new location method for the single-phase grounding fault of power cable based on time-reversal technology. When the single-phase grounding fault of power cable occurred, this method used the time-reversal symmetry of voltage wave equation, inverted the time-domain voltage wave collected at the line terminals into an equivalent current wave and returned it to the transmission line; then calculated the energy value of the current through the assumed fault point, determined the distance of fault point to the line terminal based on the time-space synchronization focusing properties. Matlab simulation results show that the method can accurately and effectively achieve the single-phase grounding fault location of power cable, and not only be applicable to the ground faults with different fault resistances, also have the characteristics of fast convergence speed and high fault location precision.