雷电分布情况对10kV架空配电线路防雷的影响分析

以珠江三角洲某地区1999~2008年的雷电定位数据为样本,用线路走廊法统计分析不同走廊宽度、1 km宽度下不同年份以及与线路走廊平行走廊的地闪密度变化特征。统计分析珠江三角洲某地区雷电流幅值概率分布规律,结合10 kV配电线路绝缘配置情况和典型杆塔参数计算线路的耐雷水平,根据拟合的珠江三角洲某地区雷电流幅值概率分布函数得出各种绝缘配置情况下的线路直击雷、感应雷危险雷电流概率,从而确定出该地区10 kV配电线路加强绝缘方案的绝缘水平合理区间。

Analysis of Affects of Lighting Distribution on 10 kV Overhead Distribution Lines

For researching lightning parameters effects on 10 kV distribution line,the author uses thunder and lightning location data through 1999 to 2008 as an example to statistical analysis flash density variation characteristics and lightning current amplitude probability distribution law in different widths of corridor and different years by the way of transmission line corridor.Besides,the lightning withstand level of the line is calculated which combines with the insulation configuration and the typical tower parameters,and then,the line direct lightning stroke,lightning dangerous probability of lightning current are drawn according to fitting of the Pearl River Delta area of lightning current amplitude probability distribution function,finally,the reinforced insulation scheme insulation level reasonable interval of the 10 kV distribution line is identified.