广州地区线路雷击跳闸特性统计与仿真  

Statistics and Simulation of Lightning Trip Out of Transmission Lines in Guangzhou Area

作　　者：陆国俊 罗健斌 刘瀚波[2] 王泽众[2] 耿屹楠 余占清[2] 曾嵘[2] LU Guojun 1, LUO Jianbin1, LIU Hanbo2, WANG Zezhong2, GENG Yinan2, YU Zhanqing2, ZENG Rong2(1. Guangzhou Power Supply Co., Ltd., China Southern Power Grid Co., Ltd., Guangzhou 510410, China; 2. State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment, Tsinghua University, Beijing 100084, Chin)

机构地区：[1]广州供电局有限公司电力试验研究院,广州510410 [2]清华大学电机系电力系统及发电设备控制和仿真国家重点实验室,北京100084

出　　处：《高电压技术》2018年第5期1542-1548,共7页High Voltage Engineering

基　　金：国家自然科学基金(51207098)~~

摘　　要：输电线路雷击故障威胁电网的安全可靠运行。广州地区是全国雷电活动最强烈的地区之一,广州电网开展雷电防护对我国其他多雷地区电网建设、运行有借鉴作用。结合输电线路运行数据,分析了广州雷电活动与线路雷击跳闸情况,对典型输电线路的雷击特性进行分析,采用全波过程理论分析雷电反击过程,采用先导发展模型分析雷电绕击过程。并分析了不同电压等级典型线路的雷击跳闸率受地形类型、地形参数的影响。研究表明：雷击跳闸次数和地闪次数具有一定的相关性。500 k V线路绕击跳闸率远远高于反击跳闸率;220 k V线路绕击跳闸率与反击跳闸率接近,两者之间的关系与塔形、地形等因素相关;110 k V线路反击跳闸率相对较高,部分地形反击跳闸率明显高于绕击。山坡、山脊和跨越山谷地形下线路雷击跳闸率明显高于平地,且随坡度和跨谷深度增大而增高。Lightning is a threat to the safe and reliable operation of power grid. Guangzhou region is one of the most intense regions of the lightning activity. The lightning protection of power grid in Guangzhou can be used for other regions. Therefore, based on the operation data of the transmission line, the lightning activities and the distribution of lightning trips in Guangzhou were analyzed. Based on the analysis of the lightning characteristics of typical transmission lines in Guangzhou, the lightning strike process was analyzed by the full wave process theory, and the lightning shielding failure was analyzed by the leader progression model. Moreover, the influences of terrain types, topographic parameters on lightning trip rate of transmission line of different voltage levels were analyzed. The results show that the number of lightning trip is correlated to the lightning frequency. Shielding failure flashover rate is much higher than the back striking flashover rate for 500 k V lines. Shielding failure outage rate is close to the back striking flashover rate for 220 k V lines, which is related to tower, topography and other factors. The back striking flashover rate is relatively higher than shielding failure flashover rate for 110 k V line, and in some regions it is significantly higher. The lightning trip rate in the regions of the mountain, ridges and valleys is significantly higher than that in the flat ground region, and it increases with the increase of slope and valley depth.

关 键 词：输电线路 雷电活动 雷击跳闸率 反击 绕击 

分 类 号：TM863[电气工程—高电压与绝缘技术]