基于层次化、差异化的架空输电线路雷击风险评估 - 电力系统保护与控制.pdf

第44 卷 第4 期 电力系统保护与控制 Vol.44 No.4 2016 年2 月16 日 Power System Protection and Control Feb. 16, 2016 DOI: 10.7667/PSPC150779 基于层次化、差异化的架空输电线路雷击风险评估 邓红雷，李述文，戴 栋 (华南理工大学电力学院, 广东 广州 510641) 摘要：对当前架空输电线路雷击风险评估常用的雷害分布图法和雷击定量计算法进行了研究。针对这两种方法的 不足，提出了 “杆塔-杆塔区段-线路”差异化、多层次的雷击风险评估模型。以地闪密度为评估指标，同时充分 考虑线路本身耐雷水平、周边地形地貌情况以及历史雷击跳闸事故等情况，计算并划分各基杆塔风险等级，确定 杆塔易闪区段。同时利用层次分析法，评估各风险区段对整条输电线路的影响系数，逐层实现了整条线路雷击风 险的综合评估。最后，通过实际案例验证了该评估模型的可行性。 关键词：雷击风险评估；风险等级；架空输电线路；地闪密度；风险区段 Lightning risk assessment of overhead transmission line based on hierarchical and differentiation DENG Honglei, LI Shuwen, DAI Dong (School of Electric Power, South China University of Technology, Guangzhou 510641, China) Abstract: This paper studies the lightning hazard distribution maps and lightning strike quantitative calculation methods which are commonly used for lightning risk evaluation of overhead transmission presently, in view of the deficiency of those two methods, the “tower-tower section-line” differentiation and multi-level evaluation model is proposed. The density of ground lightning serves as the evaluation index in the proposed model. Also, the model takes the lightning withstand level of transmission line, the surrounding topography and history of lightning trip out accidents into account. According to the model, the risk grade of each tower is calculated and divided to determine the tower section that is easy to flashover. And then the paper evaluates the influence coefficient of the risk section to the whole transmissi