重庆大学学报2025，Vol.48Issue(6)：25-33,9.DOI:10.11835/j.issn.1000-582X.2024.255
特重冰区特高压直流线路导线脱冰跳跃高度及杆塔受力特征研究
Mechanical characteristics of towers and conductor jump height in UHV DC lines in ultra-heavy ice zones following ice-shedding
摘要
Abstract
The mechanical behavior of transmission towers and the maximum jump height of conductors following ice-shedding are critical factors in tower head design.In ultra-heavy ice zones,ice thickness on ultra-high voltage direct current(UHV DC)line can reach 60 mm to 80 mm,exceeding the maximum values specified in current transmission line design codes.This study establishes finite element models of UHV DC tower-line systems in ultra-heavy ice zones and numerically simulates their dynamic responses under ice-shedding conditions for varying span lengths.The analysis evaluates tower stresses,longitudinal unbalanced tensions,and maximum conductor jump heights to assess both structural performance and electrical isolation clearances.Results indicate that longitudinal unbalanced tensions surpass estimates from current design codes,and maximum conductor jump heights exceed predictions from existing empirical formulas.To enhance design accuracy,the study proposes revised values for longitudinal unbalanced tensions and modifications to the conductor jump height formula.关键词
特重冰区/特高压直流线路/塔线体系/冰跳高度/纵向不平衡张力Key words
ultra-heavy ice zone/UHV DC/tower-line system/maximum jump height/longitudinal unbalanced tension分类
动力与电气工程引用本文复制引用
王炜,杨浩,王强,张万义,薛腾磊,虞东旭,高英博,严波..特重冰区特高压直流线路导线脱冰跳跃高度及杆塔受力特征研究[J].重庆大学学报,2025,48(6):25-33,9.基金项目
中国电建集团河北省电力勘测设计研究院有限公司科技项目(22-KJDW001).Supported by Science&Technology Project of Power China Hebei Electric Power Engineering Co.,Ltd.(22-KJDW001). （22-KJDW001）
