山火烟雾对10~35 kV输电线路绝缘影响试验研究

Experimental Research on Impact of Mountain Fire Smoke on Insulation of 10~35 kV Transmission Lines

摘要:

森林山火事故造成输电线路跳闸时有发生。文中搭建了烟雾对10~35 kV输电线路绝缘影响试验研究平台，设计了烟雾试验方案，研究烟雾对10~35 kV输电线路空气绝缘特性影响以及烟雾浓度对输电线路单相对地和相间绝缘特性的影响。通过观察电压互感器开口三角电压和相对地泄漏电流大小和变化来判断烟雾对输电线路绝缘特性影响，研究了不同种类烟雾在不同浓度时对泄漏电流的影响，发现纯粹的烟雾对输电线路的绝缘特性影响较小。

Abstract:

The tripping of transmission lines occurred from time to time caused by forest and wildfire accidents. A test research platform on the insulation effect of smoke on 10~35 kV transmission lines is established, and a smoke test scheme is designed. The effects of smoke on the air insulation characteristics of 10~35 kV transmission lines are studied as well as the effects of smoke concentration on the phase-to-earth and interphase insulation characteristics of transmission lines. The influence of smoke on the insulation characteristics of transmission lines is judged by observing the triangular voltage of voltage transformer opening and the size and change of phase-to-earth leakage current. Experiments have investigated the effects of different types of smoke on leakage current under different concentration. And the experimental research shows that pure smoke has less effect on the insulation characteristics of transmission lines.