强暴雨环境棒—板短空气间隙雨柱断裂特性研究  

Study on Breakage Performance of Water Streams in Rod-plane Short Air Gap Under Heavy Rainstorm Conditions

作　　者：董冰冰 宋家乐 李特 文韬 蒋兴良[3] DONG Bingbing;SONG Jiale;LI Te;WEN Tao;JIANG Xingliang(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China;State Grid Zhejiang Electric Power Research Institute,Hangzhou 310014,China;State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400044,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009 [2]国网浙江省电力有限公司电力科学研究院,杭州310014 [3]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《高压电器》2025年第2期189-196,共8页High Voltage Apparatus

基　　金：中央高校基本科研业务费专项资金资助(JZ2023HGTB0242);国家电网有限公司科技项目(SGFJDK00SJJS2310462)。

摘　　要：强暴雨的发生会短接输电线路、杆塔、绝缘子串空气间隙绝缘距离,致使其发生雨闪事故,危害电网安全运行。为了研究强暴雨条件下空气间隙雨柱断裂特性及其对放电特性的影响规律,文中针对棒—板短空气间隙采用仿真结合试验的方式开展了雨柱断裂特性研究。结果表明:在不同流速条件下,雨柱断裂长度均随外施电压的增加而降低,但降低的趋势与流速呈负相关;雨柱临界长度随流速的增加而增大,且随雨水电导率的增大而减小,但降低的趋势随之增大;雨柱断裂的直径和断裂时刻均随外施电压的增大而减小,两者变化率均与雨柱直径正相关。比较仿真计算与试验结果发现,断裂直径、断裂长度随降雨强度、电压变化趋势近似,断裂直径的数据结果偏差约10%,断裂长度偏差约15%以内。研究结果将为输电线路设计与绝缘选择提供理论支撑。The occurrence of heavy rainstorm can keep the air gap insulation distance of transmission lines,towers and insulator strings short circuited,resulting in rain flash accident and endangering safe operation of power grid.In order to study the breakage performance of the water streams and its influence on the discharge characteristics under rainstorm conditions,the breakage performance of the water streams in rod-plate short air gap is performed by means of simulation combined with test in this paper.The result shows that under different flow velocities the breakage length of water streams decreases with the increase of applied voltage,but the decreasing trend is negatively correlated with flow velocity.The critical length of the water streams increases with the increase of the flow velocity,and decreases with the increase of water conductivity,but the decreasing trend increases accordingly.In addition,the breakage diameter and breakage time of water streams decrease with the increase of applied voltage,and the variation rates of both are positively correlated with the diameter of water streams.It is found by comparing the simulation calculation with the test results that the breakage diameter and length have the same variation trend with rainfall intensity and voltage.The deviation of the data of breakage diameter is about 10%,and the deviation of breakage length is within 15%.The research results can provide theoretical support for the design and insulation selection of transmission line.

关 键 词：强暴雨环境 直流放电 短空气间隙 雨柱断裂特性 有限元仿真 模拟试验 

分 类 号：TM855[电气工程—高电压与绝缘技术]