不均匀冰对重冰区特高压输电线路对地及交叉跨越距离的影响分析与研究  

Influence of Uneven Ice on Distance to Ground and Crossed Crossing Distance of UHV Transmission Lines in Heavy Icing Area

作　　者：吕健双[1] 李健[1] 罗超[2] LYU Jianshuang LI Jian LUO Chao(Central Southern China Electric Power Design Institute of China Power Engineering Consulting Group Corporation, Wuhan 430071, China School of Electrical Engineering, Wuhan University, Wuhan 430072, China)

机构地区：[1]中国电力工程顾问集团中南电力设计院有限公司,湖北武汉430071 [2]武汉大学电气工程学院,湖北武汉430072

出　　处：《陕西电力》2017年第3期35-38,共4页Shanxi Electric Power

基　　金：国家自然科学基金项目资助(51277135)

摘　　要：输电线路设计中,不均匀覆冰不仅影响杆塔荷载,还可能影响对地及交叉跨越距离。建立连续档不均匀冰张力计算模型,编制计算程序,分析了不均匀覆冰情况下重冰区特高压线路弧垂增大的影响因素,研究了不均匀冰对重冰区特高压线路对地及交叉跨越距离的影响。结果表明,对20mm冰区、400m以上档距或者30mm及以上冰区、300m以上档距,应以不均匀冰作为对地及交叉跨越距离控制条件。In transmission line design, uneven ice may affect not only pole and tower load, but also distance to ground and crossed crossing distance. The paper establishes the tension calculation model of uneven transmission line icing, and gives out the corresponding calculation procedure. In the light of the uneven UHV transmission line icing in heavy icing area, the paper analyzes the factors causing the increase in conductor sag, and carries out a research on the influence of the uneven ice on the distance to ground and crossed crossing distance. The results show that, when the span is above 400 m in the ice area with 20 mm of ice or the span is 300 m in the ice area with 30 mm and above of ice, the uneven ice should be the control condition of designing the distance to ground and crossed crossing distance.

关 键 词：不均匀冰 弧垂 对地及交叉跨越距离 

分 类 号：TM721.1[电气工程—电力系统及自动化]