中外架空输电线路设计风荷载规范对比分析  

Comparative Analysis on Wind Load Specifications in China and Abroad Overhead Transmission Line

作　　者：汪伟 张芸蕾 章东鸿 汪大海[2] 何运祥 向越 WANG Wei;ZHANG Yunlei;ZHANG Donghong;WANG Dahai;HE Yunxiang;XIANG Yue(China Energy Construction Group Guangdong Electric Power Design Institute Co.,Ltd.,Guangzhou 510663,China;College Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China;CPECC Southwest Electric Power Design Institute Co.,Ltd.,Chengdu 610021,China)

机构地区：[1]中国能源建设集团广东省电力设计研究院有限公司,广州510663 [2]武汉理工大学土木工程与建筑学院,武汉430070 [3]中国电力工程顾问集团西南电力设计院有限公司,成都610021

出　　处：《南方电网技术》2023年第6期117-127,144,共12页Southern Power System Technology

基　　金：国家自然科学基金资助项目(51478373)。

摘　　要：输电线路设计风荷载实质上是基于平均风静力荷载和脉动风动力效应组合的等效静力风荷载,选取GB 50545—2010、DL/T 5551—2018、IEC 60826—2017、ASCE NO.74—2020和BS EN 50341—2012等国内外5份主流的输电线路设计规范,给出了导线及地线风荷载计算表达式。从结构随机振动理论及风工程基本原理出发,推导了典型的输电线路风荷载理论模型,深入比较了计算高度、基本风速、体型系数、风压高度变换系数、风振系数等基本计算参数取值的差异性。并结合110~330 kV、500~750 kV和800 kV及以上输电线路的工程实例,详尽分析了国内DL/T 5551—2018新荷载规范的修订对风荷载的影响,揭示了荷载设计值同国外标准差异性的根本原因。研究结果可为新规范相关计算参数进一步优化提供参考依据,从而有效提高输电线路结构抗风设计的安全性、经济性和可靠性。The design wind load of transmission line is essentially equivalent static wind load based on the combination of mean static wind load and fluctuating wind dynamic effect.Five main transmission line design specifications in China and abroad,such as GB 50545—2010,DL/T 5551—2018,IEC 60826—2017,ASCE NO.74—2020 and BS EN 50341—2012,are selected to give the calculation expression of the conductors and earth wires wind load.Based on the structural random vibration theory and the basic principle of wind engineering,a typical theoretical model of wind of transmission line load is derived.The differences in the values of basic calculation parameters such as computed altitude,basic wind velocity,shape coefficient,altitude variation coefficient of wind pressure and gust response coefficient are deeply compared.Taking typical 110~330 kV,500~750 kV and 800 kV and above transmission lines as examples,the influence of the revision of DL/T 5551—2018 load code on the wind load of transmission lines is analyzed in detail,and the root cause of the difference between the design value of load and the international standard is revealed.The research results can provide reference for further optimization of relevant calculation parameters in the new specification,so as to effectively improve the safety,reliability and economy of wind-resistant design of transmission line structures.

关 键 词：基本风速 体型系数 风压高度变换系数 风振系数 荷载规范 

分 类 号：TM751[电气工程—电力系统及自动化]