河南电网500kV同塔双回线路舞动事故分析计算  

Galloping Fault Analysis and Computation for 500 kV Double Lines in One Tower in Henan Grid

作　　者：卢明[1] 傅观君[2] 阎东[1] 王黎明[2] 

机构地区：[1]国网河南省电力公司电力科学研究院,郑州450000 [2]清华大学深圳研究生院,深圳518055

出　　处：《高电压技术》2014年第5期1391-1398,共8页High Voltage Engineering

基　　金：国家电网公司重大科技项目(17kJ160101F1002920100)~~

摘　　要：为预防、治理500 kV线路的舞动事故,采用外加载荷激励的方式模拟导线舞动的产生,建立了简化的导线舞动数学模型,并对500 kV线路进行了动态仿真计算。基于建立的舞动仿真模型,分析了导线档距和舞动峰峰值对导线舞动过程中的最小相间距离和耐张串绝缘子的最大动态载荷的影响规律。结果表明:导线档距对两者的影响相对较小;而随着舞动峰峰值的增加,最小相间距离呈减小趋势,耐张串最大动态载荷呈线性增加的趋势。考虑舞动峰峰值约4.5 m时,最小相间距离仍有较大的安全裕度,而耐张串最大动态载荷相对静态载荷的放大倍数达到了1.55。耐张塔长时间承受导线舞动的巨大冲击力,是导致耐张塔横担受损的重要原因。To prevent and manage galloping accidents in 500 kV transmission lines, we established a simplified galloping mathematical model in which conductor galloping was initiated by applied load, and carried out dynamic simulation of a 500 kV transmission line. Based on the galloping model, the minimum phase clearance and maximum dynamic load for tension strings during galloping process were analyzed, and the impacts of span length and galloping amplitude were discussed. The results show that, with increasing galloping amplitude, the minimum phase clearance decreases rapidly and the maximum dynamic load for tension strings grows linearly, but the two are barely influenced by span length. When the peak of galloping is about 4.5 m, there is still abundant safe margin for the minimum phase clearance, but for a tension string, its maximum dynamic load has already become 1.55 times of its static value. The long-time, continuous, large impulsive load due to conductor galloping on tension tower is an important reason for the damage of tension tower beam.

关 键 词：输电线路 500 kV同塔双回线路 舞动 事故分析 相间距离 动态载荷 动态仿真 

分 类 号：TM752[电气工程—电力系统及自动化]