导线张力对输电杆塔安全性和经济性的影响研究  

Study on the Influence of Wire Tension on the Safety and Economy of Transmission Tower

作　　者：种芝艺 李燕雷 程述一 鄢秀庆 梁明 鲁俊 张林枫 CHONG Zhiyi;LI Yanlei;CHENG Shuyi;YAN Xiuqing;LIANG Ming;LU Jun;ZHANG Linfeng(State Grid Corporation of China,Xicheng District,Beijing 100031,China;Southwest Electric Power Design Institute Co.,Ltd.of China Electric Power Engineering Consulting Group,Chengdu 610021,Sichuan Province,China;State Grid Economic and Technological Research Institute Co.,Ltd.,Changping District,Beijing 102209,China)

机构地区：[1]国家电网有限公司,北京市西城区100031 [2]中国电力工程顾问集团西南电力设计院有限公司,四川省成都市610021 [3]国网经济技术研究院有限公司,北京市昌平区102209

出　　处：《全球能源互联网》2023年第1期26-32,共7页Journal of Global Energy Interconnection

基　　金：国家电网公司科技项目(SGTYHT/19-JS-215)。

摘　　要：针对使用广泛的500 kV架空输电线路,分别研究了在轻、中、重冰区,由断线及不均匀覆冰引起的导线张力对输电杆塔安全性和经济性的影响。研究表明:导线张力增加0~20%,若保持杆塔杆件规格不变,悬垂塔的超限杆件比例为0~51%,耐张塔的超限杆件比例为0~4%;若增大杆塔杆件规格以保证安全,悬垂塔的塔重增加0~28%,耐张塔的塔重增加0~5%;覆冰越厚,由断线引起的导线张力对杆塔影响越小,由不均匀覆冰引起的导线张力对杆塔影响越大;导线张力主要影响悬垂塔横担上、下平面交叉材、塔身主斜材等杆塔杆件。因此,对重要输电线路和输电线路重要区段,推荐重点加强悬垂塔的防串倒及抗冰能力。研究结论对工程实践具有一定的指导意义。The influence of wire tension caused by disconnection and uneven ice coating on the safety and economy of transmission towers in light,medium,and heavy ice areas is studied for the widely used 500 kV overhead transmission lines.Studies have shown that when the wire tension increases by 0-20% if the members of the tower remain unchanged,the proportion of over-limit members of the suspension tower is 0-51%,and the proportion of over-limit members of the tensile tower is 0-4%;if the members of the tower are changed to ensure safety,the weight of the suspension tower will increase by 0-28%,and the weight of the tensile tower will increase by 0-5%;the thicker the icing,the less affection on the tower caused by wire tension after wire broken,and the more affection on the tower caused by wire tension under the action of uneven icing;the wire tension mainly affects the upper and lower plane cross members of the cross arm,the main inclined member of the tower body.Therefore,for important transmission lines and important sections of transmission lines,it is recommended to focus on strengthening the anti-cascade and anti-icing capabilities of suspension towers.The research conclusions have certain guiding significance for engineering practice.

关 键 词：导线张力 安全性 经济性 杆塔 

分 类 号：TM75[电气工程—电力系统及自动化]