山火条件下35 kV输电线路故障信号特征试验研究

Experimental Research on Fault Signal Characteristics of 35 kV Transmission Line under Mountain Fire

山火灾害有很大概率会引起线路跳闸从而导致停电事故,威胁电力系统安全稳定运行。为研究山火引发35 kV输电线路故障信号特征,搭建了山火条件下35 kV输电线路山火故障模拟试验平台,进行了山火故障模拟试验,分别测量并记录了火焰单相导线试验、火焰相间导线试验、烟雾单相导线试验、烟雾相间导线试验的试验波形和试验现象。研究表明,烟雾对输电线路绝缘的影响很小,而火焰会对输电线路绝缘产生较大的影响。研究结果对研究防山火事故措施可提供理论支持。

Wildfire disasters have a high probability to cause line trippings,which leads to power outages and threatening the safe and stable operation of power system.In order to study the fault signal characteristics of 35 kV transmission line caused by the wildfire,a mountain fire fault simulation test platform for 35 kV transmission line under the wildfire condition is established,and the wildfire fault simulation test is carried out.The waveforms and phenomena of flame single-phase wire test,flame phase-to-phase wire test,smoke single-phase wire test,and smoke phase-to-phase wire test are measured and recorded.The research shows that smoke has little effect on the insulation of transmission lines,while flames have a greater impact on the insulation of transmission lines.The research results can provide a theoretical support for the study of measures to prevent mountain fire accidents.