500 kV同塔双回复合横担杆塔研究  

Research on Composite Cross-arm Tower of 500 kV Double Circuit Transmission Line

作　　者：李健[1] 吕健双[1] 柯嘉[1] 柏晓路[1] 张瑚[1] LI Jian;LYU Jianshuang;KE Jia;BAI Xiaolu;ZHANG Hu(Central Southern China Electric Power Design Institute Co.,Ltd.of China Power Engineering Consulting Group,Wuhan 430071,China)

机构地区：[1]中国电力工程顾问集团中南电力设计院,湖北武汉430071

出　　处：《电力勘测设计》2023年第2期57-61,88,共6页Electric Power Survey & Design

摘　　要：本文针对500 kV双回复合横担杆塔技术方案开展深入研究。对实际尺寸的复合横担绝缘子开展人工污秽工频电压试验,确定复合横担最小结构高度及爬距。根据连续档不平衡张力及断线张力计算结果,确定合适的悬垂金具串长度。结合复合横担的受力特点,确定“拉压双杆”的复合横担结构型式。采用有限元分析软件对各工况下复合材料横担杆件的轴力进行分析,并提出新型节点型式。根据与500 kV常规角钢铁塔的技术经济比较,500 kV双回复合横担杆塔在本体投资与走廊费用上均有经济优势,具有良好的应用前景。In this paper, an in-depth study is conducted on the technical solution of composite cross-arm tower of 500 kV double circuit transmission Line. The minimum structure height and creepage distance of composite crossarms were determined by conducting artificial fouling frequency voltage tests on the actual size of composite crossarms insulators. According to the calculation results of unbalanced tension and broken line tension of a continuous section, the suitable length of suspension fitting string was determined. Combined with the force characteristics of the composite cross-arms, the composite cross-arms structure type of "pulling and pressing double rods" was determined.The finite element analysis software was used to analyze the axial force of the composite cross-arms under each working condition, and a new node type was proposed. According to the technical and economic comparison with 500 kV conventional angle steel tower, the 500 kV double composite cross-arms have economic advantages in terms of body investment and corridor cost, and have good application prospects.

关 键 词：输电线路 复合横担 塔头设计 

分 类 号：TM726[电气工程—电力系统及自动化]