煤矿35 kV线路防雷保护间隙的研究  

Research of lightning protection gap of 35 kV power line of coal mine

作　　者：邓杰文[1] 任文斌 刘源[1] 张东[1] 易小飞[1] 廖志华[1] 

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410076 [2]山西阳泉煤业(集团)有限责任公司,山西阳泉045008

出　　处：《工矿自动化》2013年第1期105-110,共6页Journal Of Mine Automation

摘　　要：为验证保护间隙对35kV线路的防雷保护效果,在ATP-EMPT电磁暂态分析软件环境下,以某矿区35kV架空线路为模型,模拟雷击入侵35kV变压器,对比加装保护间隙前后变压器高压侧过电压峰值,结果表明,35kV线路在遭受单相或三相雷击后,保护间隙能够大幅降低变压器高压侧的雷电侵入波峰值;分析了加装防雷保护间隙后35kV线路的耐雷水平与雷击跳闸率,结果表明线路耐雷水平降低,雷击跳闸率上升,但均符合DL/T 620—1997要求。应用结果表明,煤矿35kV线路安装防雷保护间隙后能够有效抑制雷电波入侵变电装置,但需配合自动重合闸装置,以提高线路防雷的可靠性。In order to test lightning protection effect of protection gap for 35 kV power line, the paper simulated lightning invasion in 35 kV transformer taking 35 kV overhead line of a mine as model by use of ATP-EMPT electromagnetic transient analysis software, and compared over-voltage peak value at high- voltage side of transformer before and after installing the protection gap. The compare result showed that the protection gap can significantly reduce the peak value of lightning invasion wave at high-voltage side of the transformer after 35 kV power line is subjected to single-phase or three-phase lightning. The paper also analyzed lightning withstanding level and rate of lightning trip of 35 kV power line with lightning protection gap, whose conclusions are the lightning withstanding level reduces and rate of lightning trip rises, while the two that the lightning pr invading substation lightning protection parameters satisfy requirements of DL/T 620-1997. The application results showed otection gap installed on 35 kV line of coal mine can effectively inhibit lightning from device, but should run with automatic reclosing device for higher reliability of line

关 键 词：煤矿电网 35 KV架空线路 线路防雷 雷电过电压 保护间隙 耐雷水平 雷击跳闸率 ATP-EMPT 

分 类 号：TD608[矿业工程—矿山机电]