微地形气候环境下郴州电网雷害活动分布规律分析

Analysis of Lightning Activity Distribution of Chenzhou Power Grid under Micro Topography and Climate Environment

以雷电定位系统记录的2012—2016年雷电定位数据为样本,结合郴州地区地理气候特征,分析该地区雷电地闪频次的年变化趋势、月度分布规律、正/负地闪变化规律;根据网格法绘制了2012—2016年的地闪密度分布图和近5年的平均地闪密度分布图,对输电线路雷击故障点分布情况进行相关性分析;拟合了2012—2016年的雷电流幅值概率分布函数,并对前、后汛期的雷电流幅值概率分布曲线的差异进行了对比分析。为郴州电网输电线路防雷计算和防雷措施的制定提供了依据。

Based on the 2012-2016 lightning location data recorded by lightning location system, combing with the geographical and climatic features of Chenzhou area, it analyzes the area of lightning flash frequency of annual variation trend, monthly distribution and positive / negative CG changes. Using the grid method to draw up 2012-2016 flash density distribution map nearly 5 years of flash density distribution, it makes correlation analysis with transmission line lightning fault point distribution. Amplitude probability distribution function of flow of lightning in 2012-2016 years is of fit, and it makes comparing analysis of differences before and after the flood of lightning current amplitude probability distribution curves. It can provide reference to the calculation and the development of lightning protection measures of lightning protection at transmission line in Chenzhou power grid.