河南电网500kV同塔双回线路舞动事故分析计算

发布时间：2018-05-01 21:04

本文选题：输电线路 + kV同塔双回线路　；参考：《高电压技术》2014年05期

【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。
[Abstract]:In order to prevent and control the galloping accident of 500 kV transmission line, the generation of conductor galloping is simulated by means of external load excitation, a simplified mathematical model of conductor galloping is established, and the dynamic simulation calculation of 500 kV transmission line is carried out. Based on the galloping simulation model, the influence of traverse distance and peak value on the minimum phase distance and the maximum dynamic load of the insulator are analyzed. The results show that the influence of traverse spacing on both is relatively small, but with the increase of the peak value of galloping peak, the minimum phase distance decreases and the maximum dynamic load of the tensile string increases linearly. When the peak value of the galloping peak is about 4.5 m, the minimum phase distance still has a large safety margin, and the magnification of the maximum dynamic load of the tensile string relative to the static load reaches 1.55. The resistance tower bears the tremendous impact force of the wire galloping for a long time, which is the important reason that causes the damage of the tension tower cross pole.
【作者单位】：国网河南省电力公司电力科学研究院;清华大学深圳研究生院;
【基金】：国家电网公司重大科技项目(17kJ160101F1002920100)~~
【分类号】：TM752

【参考文献】