行波法动车电缆故障检测技术及其应用

摘要

Aiming at the issues of determination of the cable faults caused by extended running time of the trains and cable overload, and to measure the distance to the fault point, the new detection method based on traveling wave method is proposed. Firstly, in accordance with the different nature of the faults, the faults are classified;then, based on different types of faults, the faults are analyzed and located by using time domain analysis and impulse flash method in traveling wave method. Finally, the operation procedures of the new fault detection method are introduced in detail;the feasibility of this method is verified through analyzing the waveworm graphics. This new method overcome the limitation of two kinds of methods in cable fault detection, it possesses higher practical significance.%针对动车电缆运行时间延长与电缆负荷增加而引起的电缆故障判定、测距等问题，提出了一种新的基于行波法的电缆故障检测方法。首先根据动车电缆故障的不同性质，进行故障电缆类型划分。其次，针对电缆中的不同类型的故障，分别采用行波法中的时域分析法、冲闪法进行故障分析及测距。最后，详细介绍了新的故障检测方法操作步骤，通过波形图分析验证了该方法的可行性。新的故障检测方法克服了两种方法各自在电缆故障检测方面的局限性，具有较高的实用意义。