广州地域1999～2008年地闪密度图及雷电参数分析

Analysis of Ground Flash Density and Lightning Parameters of Guangzhou in 1999～2008

为掌握高雷区雷电活动规律，以广州地区1999-2008年间雷电定位数据为基础，利用雷电参数统计技术及综合分析平台，结合GIS系统，详细研究了广州地域地闪总数、地闪密度、雷电幅值、雷电幅值概率分布及雷电日等重要雷电参数。研究表明广州地区地闪分布季节性明显，54％～83％的地闪主要集中在夏季；地闪密度空间分布具有较强的规律性，与海拔高度关系密切，相比雷电日更能科学反映实际雷电活动分布和变化特征；正负极性雷电流幅值均有明显的集中性。以广州电网500kV蓄增甲线为例，分析得到走廊沿线雷电活动与雷击故障具有较强的相关性，对于解决高雷区长期电网防雷难题更有指导意义。

The Lightning Location System has been put into operation in Guangzhou, one of the highest thunderstorm regions in China, for a decade, and accumulated a ten-year lightning detection data. In order to master the characteristics of lightning activities in Guangzhou, this paper applies the lightning parameter statistical technology and geographic information system to particularly study the lightning amount, flash density, lightning current, thunderstorm day, as well as their distribution. The studies show that ground flashes in Guangzhou have distinct seasonal characteristics and 54%-83% of the total amount concentrates in summer. The special distribution of ground flash density has a strong regularity, and it also has a close relationship with elevation. Compared with the traditional thunderstorm day, the ground flash density is more scientific and applicable to describe the distribution characteristics of lightning activities. The analysis results also show that both the positive and negative lightning currents have a clear centrality. In this paper Xuzeng Jia Line is analyzed in detailed as an application example of lightning parameters for lightning protection of transmission lines. The results show that there is a strong correlation between the lightning faults and lightning activities along the line corridor, which would provide a guide for solving the long-term difficult problems of lightning protection in power system of high thunderstorm regions.