某地区雷电参数分析及配电线路地闪密度统计方法研究

Analysis of Lightning Parameters and Study on the Statistics Method of Ground Flash Density of Distribution Lines

雷电作为一种自然现象,长期威胁着电网的安全稳定运行。为给配电线路雷电防护设计和运行维护提供依据,通过雷电定位系统的监测数据,对某地区2011—2015年雷电参数进行统计,分析了该地区地闪密度、落雷总数以及雷电流幅值累积概率分布曲线的特征,结果表明:地区地闪密度呈现从西北到东南逐渐降低的趋势、落雷总数也逐年降低。中值电流幅值先增大后减小,2014年雷电流大于感应雷耐雷水平的概率为42.6%。最后,通过研究对比不同的配电线路雷电参数统计方法,提出一种基于配网拓扑网状结构的雷电参数统计新方法。

As a natural phenomenon, lightning has long threatened the safe and stable operation of power grid. In order to provide evidence for lightning protection design and operation maintenance, though the data monitored of lightning location system, lightning parameters from 2011 to 2015 in one region were statisticsed analyzed the region ground flash density, total ground lightning and the lightning current amplitude characteristic of the cumulative probability distribution curves. The results show that ground flash density reduced gradually from the northwest to the southeast;total ground lightning also reduced year by year. The mid-value current increased at first and then decreased. In 2014, the probability that the lightning current is greater than the level of induced lightning resistance is 42.6%. Finally, a new statistical method of lightning parameters based on distribution network topology is proposed by comparing different statistical methods of lightning parameters of distribution lines.