考虑多参数影响的输电线路绕击跳闸率求解算法  

Algorithm for Solving Transmission Line Shielding Failure Trip-Out Rate Considering Multi-Parameter Influence

作　　者：唐波[1] 刘子怡 彭友仙 黄力[1] 袁发庭 TANG Bo;LIU Ziyi;PENG Youxian;HUANG Li;YUAN Fating(College of Electrical Engineering&New Energy,China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002

出　　处：《电瓷避雷器》2020年第6期151-158,共8页Insulators and Surge Arresters

摘　　要：现有的输电线路绕击跳闸率算法无法适用于当前输电线路差异化防雷的要求。为兼顾输电线路绕击跳闸率求解的准确性和工程实用性,引入地形倾角、高空风速和雷电先导入射角3个影响因子,提出了对传统电气几何模型进行改进的方法。分析导线、地线风偏后与大地平面之间的空间几何位置拓扑变化,基于传统电气几何模型,构建了线路杆塔位于山顶、山坡,以及线路爬坡架设条件下的坐标系。通过坐标旋转,推导了考虑多参数影响下的最大击距、暴露弧和绕击跳闸率求解方程,提出适用于工程实际的考虑多参数的绕击跳闸率求解算法。以美国345 kV输电线路为例对提出的算法进行验证,结果表明,相对于传统算法,误差降低了56.15%。该算法已在三门峡地区防雷工程中得到了应用,效果良好。The traditional algorithm of transmission line shielding failure trip-out rate cannot meet the current requirement of differential lightning protection of transmission lines. Considering both the accuracy and the engineering application of shielding failure trip-out rate of transmission lines,three factors of terrain inclination,high-altitude wind speed and lightning leader angle are introduced,and the method of improving the traditional electrical geometry model is proposed. Based on the traditional electrical geometry model,the coordinate system of the line tower on the top of the mountain,the hillside,and the line climbing erection condition is constructed based on the analysis of the geometrical positional changes of the spatial position between the conductor and the ground wind and the ground plane. Through the coordinate rotation,the equations of maximum hitting distance,exposed arc and shielding failure trip-out rate under the influence of multi-parameters are deduced. The algorithm for solving the multi-parameter shielding failure trip-out rate is proposed. The proposed algorithm is verified by taking the US345 k V transmission line as an example. The results show that the error is reduced by 56. 15% compared with the traditional algorithm. The algorithm has been applied in the lightning protection project in Sanmenxia area,achieving good result.

关 键 词：输电线路 绕击跳闸率 电气几何模型 地形倾角、高空风速、雷电先导入射角 坐标旋转 

分 类 号：TM863[电气工程—高电压与绝缘技术]