时间反演技术在低压脉冲电缆故障定位中的应用

Application of Time Reversal Technology to Fault Location of Low-voltage Pulse Cable

低压脉冲法可以有效定位电缆中故障点,并对故障点类型做出判断。但是传统的低压脉冲法需要人为干预分离脉冲和存在无法直观确定故障点位置等问题。为解决该问题,提出将时间反演技术用于低压脉冲电缆故障定位。首先,介绍了该方法的原理并阐述了相关计算步骤;然后,通过仿真证明了该方法可以在无需人为识别脉冲的前提下有效确定电缆中的故障点,并对该故障进行类别辨识;最后,在实验室中对105 m交联聚乙烯电缆制作局部缺陷并用所提方法进行测试。实测结果证明了时间反演技术用于低压脉冲电缆故障定位的可行性和有效性。

The low-voltage pulse method can effectively locate the fault in the cable and judge the type of the fault.The traditional low-voltage pulse method needs to separate the pulse artificially,and it is difficult to directly locate the fault in the cable.In order to solve this problem,the time reversal technology is introduced in low-voltage pulse method for locating the fault.Firstly,the principle of the proposed method is introduced and its calculation process are given.And then,the simulation results prove that the proposed method can effectively locate the fault in the cable and judge the type of the fault without human intervention.Finally,in the laboratory,the proposed method is tested in a 105 m XLPE cable with a local defect.The measurement results confirm the feasibility and effectiveness of the proposed method.