电缆泄漏电流在线监测相关理论与仿真研究  

Theoretical Study and Simulation Verification About Online Monitoring of Cable Leakage Current

作　　者：常宇健[1] 李加驹 

机构地区：[1]石家庄铁道大学电气与电子工程学院,河北石家庄050043

出　　处：《石家庄铁道大学学报（自然科学版）》2017年第1期99-103,共5页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

摘　　要：以某牵引变电所长度为100m左右的埋地电缆为研究对象,对电缆故障泄漏电流检测法进行理论分析与建模仿真研究,泄漏电流通过电缆首尾端电流的差值获得。研究表明,泄漏电流会随着电缆绝缘材料劣化的加剧而出现增大的趋势,根据该变化趋势可以作为电缆发生老化故障的判断依据。劣化过程中电缆首尾端电流的相位差也会出现增大的趋势;对该相位差进行校正以计算出正确的泄漏电流值,对于保证该检测方法的有效性具有重要意义。Based on the contact network of about 100 meters of buried cable in a traction substation, studying on the cable fault leakage current detection method both theoretically and in the way of simula- tion, the leakage current can be obtained by subtracting the current head and tail ends of each cable. Sim- ulation study shows that, the leakage current will increase with the deterioration of the cable insulation material; and the trend of the change can be used as the basis for judging whether the insulation of the cable is aging or not; and in the deterioration process, the phase difference of current cable head and tail end will has a tendency of increase. Therefore, the phase difference is corrected to calculate the correct leakage current value, which has important significance to guarantee the validity of this method.

关 键 词：电缆绝缘故障 在线监测 泄漏电流法 理论建模 ATP仿真 

分 类 号：TM93[电气工程—电力电子与电力传动]