摘要
架空线路途径植被茂密地区时,超过安全距离的树木会对电网造成严重影响。以某220 kV输电线路由于树障引起线路跳闸事件为例,首先介绍输电线路智能故障诊断系统的组成及工作原理,再利用单端行波测距法定位故障点,并通过分析行波波形特征辨识出故障类型,最后与人工现场巡线结果对比,结果表明系统的诊断结果与人工巡线结果相近,从而验证了智能故障诊断系统的高效性和准确性,对电力系统的建设和发展具有重要意义。
When overhead lines pass densely vegetated areas, trees beyond safe distances will have a serious impact on the power grid. Taking a 220 kV transmission line trip event caused by tree barrier as an example, this paper first introduces the composition and working principle of the intelligent fault diagnosis system for transmission line, then locates the fault point by using single-ended traveling wave location method, and identifies the fault type by analyzing the waveform characteristics of traveling wave. Finally, it compares with the results of manual line patrol. The results show that the diagnosis results of the system are in phase with those of manual line patrol. In recent years, the efficiency and accuracy of intelligent fault diagnosis system are verified, which is of great significance to the construction and development of power system.
引文
[1]黄建峰,余刚华,胡枫.基于分布式行波监测技术的山火跳闸故障分析研究[J].电工文摘,2014(5):31-33.
[2]GB/T 35721-2017.输电线路分布式故障诊断系统[S].2017.
[3]陈小贝,汪志成,沈俊飞.基于行波法的民用电力线路故障测距技术[J].国外电子测量技术,2016,35(3):89-92.
[4]祝贺,于卓鑫,严俊韬.特高压输电线路树障隐患预判及仿真分析[J].2018,38(2):21-27.
[5]胡彬,周宗国,杨时宽,等.输电线路走廊树障清理相关技术分析[J].2018(9):126-127.
