内蒙古电力技术2025，Vol.43Issue(2)：54-61,8.DOI:10.19929/j.cnki.nmgdljs.2025.0022
基于全生命周期的重冰区特高压线路导线安全系数研究
Research on Safety Coefficients of Conductors for UHV Transmission Lines in Heavy Icing Zones Based on Full Life Cycle
摘要
Abstract
In order to reasonably select the safety coefficient of conductors in the heavy icing zones of UHV transmission lines and improve the line safety,the conductor types and safety coefficients of the heavy icing zones involved in the UHV projects that have been put into operation in China since 2009 are investigated.The relationship among the conductor safety coefficient,sag,stress and the mass of iron towers in the heavy icing areas are analyzed.Based on three-dimensional space mechanics,numerical calculations are carried out on the influence of the tension of the strain insulator string on the safety coefficient of the suspension point of the UHV transmission line.Finally,the adaptability of conductor merging in the alternate sections of the heavy icing areas is analyzed based on full life cycle.The results show that as the conductor safety coefficient increases,the mass of the iron tower decreases.At the same time,the increase in conductor sag leads to an increase in the height of the iron tower.When the conductor safety coefficient reaches a certain critical point,there is an optimal solution for the mass of the iron tower.The recommended conductor safety coefficients for the extremely heavy icing areas with ice thicknesses of 40 mm and 60 mm are 3.5 and 3.1 respectively.The influence value of the tension of the strain insulator string on the safety coefficient of the suspension point is usually between 0.1 and 0.2.The conductors in the shorter alternate sections of the heavy icing areas can be appropriately merged.关键词
全生命周期/重冰区/特高压/导线/安全系数/应力/荷载Key words
full life cycle/heavy icing area/UHV/conductor/safety coefficient/stress/load分类
动力与电气工程引用本文复制引用
马海木呷,马海云,王杰,罗鸣,刘炯..基于全生命周期的重冰区特高压线路导线安全系数研究[J].内蒙古电力技术,2025,43(2):54-61,8.基金项目
中国电力工程顾问集团西南电力设计院有限公司科技项目"特重冰区交流特高压输电线路设计关键技术研究"(KQ0743) （KQ0743）
