浅谈10kV架空绝缘线断线故障及防范措施

Introduction of Break-Line Fault on 10 kV Overhead Insulated Wire and Its Protection Measures

摘要: 为保证电网系统安全、可靠的运行，作为城市电力系统重要组成部分的10 kV配电线路现己经大多采用架空绝缘导线，因其安全、可靠、经济、建设维护方便等特点深受人们的喜爱。但是输电线路实际运行结果和实验数据表明雷击断线问题是绝缘导线应用中出现最多的一个。近年来大规模配电网绝缘化改造，有效提高了配电线路的供电可靠性，缓解了绿化中的树线矛盾，具有良好的社会效益和经济效益；但是雷击断线及导线进水氧化断线问题十分突出，本文对各种断线原因进行分析并提出了防范措施。

Abstract: In order to ensure the safety and reliability of the operation of the distribution system, the overhead insula- tion-covered conductors was applied in 10kV distribution line which is an important part of city power system. Because it is safe, reliable, economic and convenient to construct and maintain, it is deeply loved by people. But the results of the operation and the data of experiments show that lighting-caused breaking is a big problem in using overhead insulation-covered conductors. In recent years, the distribution system has been reconstructed by insulation on a large scale, so the power supply reliability of distribution line is effectively improved which relieves the contradictions between the tree and line, and it leads to good social efficiency and economic benefits. However, the issues of lighting-caused breaking and oxidation disconnections with water leaking into wire are very outstanding. This paper analyzes all kinds of wire break reasons and presents the preventive measures.