某煤矿输电线路防雷改造研究

Researches on Lightning Protection Reconstructions of Coal Mine Transmission Line

煤矿用电负荷属于一类负荷,对供电的要求性比较高。由于山西阳泉煤矿集团的35 kV线路多处于山地,受地形的影响,雷电活动较为频繁,线路雷击跳闸率较高,严重影响矿区供电的可靠性。从现有防雷措施不当和线路绝缘配置不合理等方面对该煤矿集团雷害事故较为频繁的原因进行了分析。提出了拆除消雷器、两回线路采用不平衡绝缘和加装线路避雷器等防雷措,取得了较好的防雷效果。

Coal electricity load belongs to one type of load,whose requirements are relatively high.Yangquan,Shanxi Coal Mine Group of 35kV lines are mostly in the mountain,the terrain effects,more frequent lightning activity,higher lightning trip rate,and seriously impact on the reliability of the mine power supply.In the aspects of existing improper lightning protection measures and unreasonable wiring insulation configuration,the reasons of frequent lightning disturbance in that Coal Mine Group are analyzed.The lightning protection measures such as removing lightning eliminator,using unbalanced insulation in the two back to the circuit and installation of the line arrester,etc.,are carried out,and achieved a good lightning protection effect.