摘要
本文为解决传统行波测距方法中,直流分量对交联聚乙烯(XLPE)电缆的损害以及故障检测成功率不高的问题,通过分析冲闪法和直闪法测距技术存在的问题,发现了行波测距检测的是电力电缆故障点放电产生的脉冲行波信号,而非注入的高压脉冲信号,得出了脉冲和直流高压的击穿能力依赖于储能电容的容量,输出电流不能有效保证故障点低阻状态等重要结论,并提出了"交流高压闪络法"作为XLPE电缆测量方法,即采用高压交流电源击穿电缆故障点,能够提供持续的大电流,保证故障点持续放电。通过仿真分析和工业实验,证明了本方法的有效性,提高了测距的准确性和可靠性。
In order to solve the problem that the damage of the direct current component to the XLPE cable and the success rate of the fault detection are not high, the problems of the flushing and direct flicker are studied, then concluded that the traveling wave distance measurement is the pulse wave signal produced by the power cable fault point discharge instead of the high injection. The breakdown ability of the pulse signal depends on the capacity of the energy storage capacitor. The output current cannot effectively guarantee the low resistance state of the fault point and so on. The "AC high voltage flashover method" is proposed as the XLPE cable measurement method that is to use the high voltage AC power supply to breakdown the cable fault point, which can provide the continuous operation. Large current can ensure the continuous discharge of the fault point. The validity of this method is proved through simulation analysis and industrial experiment, and the accuracy and reliability of the distance measurement are improved.
作者
时振堂
孙进
颜廷纯
黎德初
Shi Zhentang;Sun Jin;Yan Tingchun;Li Dechu(SINOPEC Dalian Petroleum and Chemical Research Institute, Dalian, Liaoning 116045;Shandong Kehui Electric Power Automation Limited by Share Ltd, Zibo, Shandong 255000;SINOPEC Guangzhou Branch, Guangzhou 510726)
出处
《电气技术》
2019年第4期56-60,共5页
Electrical Engineering
基金
国家自然科学基金(51477184)
中国石化集团公司资助项目(316087)
关键词
行波测距
交流高压闪络法
仿真分析和工业实验
traveling wave fault location
AC high voltage flashover method
simulation analysis and industrial experiment
