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为了合理选取特高压输电线路重冰区导线安全系数，提高线路安全性，调研了自2009年以来我国已投运特高压工程涉及重冰区段的导线型号及安全系数，分析了重冰区导线安全系数与弧垂、应力和铁塔质量的关系；基于三维空间力学对输电线路悬挂点安全系数受耐张串拉力的影响进行数值计算；最后基于全生命周期对重冰区交替段导线归并适应性进行分析。结果表明，随着导线安全系数的增大，铁塔质量单体减少，同时导线弧垂增大导致铁塔高度增加，铁塔单体质量增大，当导线安全系数达到某个临界点，铁塔质量有最优解；40 mm和60 mm特重冰区推荐导线安全系数分别为3.5和3.1；耐张串拉力对悬挂点安全系数的影响值通常在0.1~0.2；对较短的重冰区交替段导线可进行适当归并。
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.
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基本信息:
DOI：10.19929/j.cnki.nmgdljs.2025.0022
中图分类号:
引用信息:
[1]马海木呷1,马海云1,王杰2等.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],2025,43(02):54-61.DOI:10.19929/j.cnki.nmgdljs.2025.0022.
基金信息:
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）