金寨地区10kV配网防雷改造措施分析

Analysis of Lightning Protection Reform Measures for 10kV Distribution Network in Jinzhai Area

以金寨地区10kV配网为研究对象,使用EMTP软件建立金寨地区典型配网线路模型,分析了金寨地区落雷情况和线路耐雷水平对雷击跳闸的影响,以及地闪特征与雷击跳闸次数的相关性。研究表明,金寨地区线路雷击跳闸次数与落雷情况具有强相关性,近3年线路跳闸次数提高主要是由于金寨地区地闪密度及地闪强度提高。基于金寨地区地闪时空分布特性,提出10kV配网线路防雷改造措施,并分析了线路防雷改造后与10kV开关站的绝缘配合问题。

Taking the 10 kV distribution network of Jinzhai area as the research object,the EMTP software was used to establish the typical distribution network line model for analyzing the impact of lightning fall and line lightning withstand level on lightning trip.And then the correlation between the characteristics of ground lightning and the number of lightning trips was theoretically analyzed.The results show that there is a strong correlation between the number of lightning trips and the situation of lightning strikes in Jinzhai area.The increase of the number of line trips in the past three years is mainly due to the increase of the density and intensity of lightning flashes.Based on the temporal and spatial distribution characteristics of lightning in Jinzhai area,the lightning protection reconstruction measures for 10 kV distribution network lines was put forward,and the insulation coordination between the lines and 10 kV switchyard after the lightning protection reconstruction was analyzed.