陈科技,白航,楼文娟,张琳琳,陈赛慧
CHEN Keji,BAI Hang,LOU Wenjuan,ZHANG Linlin,CHEN Saihui

• 1:国网浙江省电力有限公司经济技术研究院
• 2:四川省建筑科学研究院有限公司
• 3:浙江大学建筑工程学院结构工程研究所

摘要(Abstract)：

针对4次台风下我国东南沿海地区输电线路闪络故障,对实际故障线路进行了跳线风偏响应的有限元精细化分析并确定了计算模型;采用现行手册计算方法求解得到故障塔处的跳线风偏位移并与有限元计算结果进行对比,指出手册计算方法的主要误差来源。结果表明:跳线风偏重合率低,已成为近年来我国东南沿海地区输电线路跳闸闪络故障的最主要原因;与跳线相连的导线运动对跳线风偏响应有较为明显的影响,取前后各一跨导线及跳线结构的耦联模型计算结果与全跨模型一致;脉动风对跳线风偏响应的放大系数约为1.38,由于未考虑脉动风的放大作用以及客观存在的模型误差,现行手册计算方法得到的跳线风偏位移要明显小于有限元计算结果,这也是输电线路跳线风偏闪络故障频发的原因之一。
Given flashover faults on transmission lines during the four typhoons in the southeast coastal areas in China, the wind-induced swing response of jumper wire of faulty transmission lines was calculated by elaborative FEM analysis, and a calculation model was determined. The current manual calculation method was employed to obtain the wind-induced swing displacement, and the result was compared with that concluded by the finite element method. The source of error in manual calculation method was analyzed. The results show that it is a low coincidence rate that leads to flashover trip on transmission lines in the southeast coastal areas in recent years; the movement of conductors connected with jumper wires has a significant influence on the wind-induced swing of the wires. The couple connected model consisted of two spans of conductor and jumper wire has similar results with a full-span model. The amplification factor of fluctuating wind is about 1.38. Disregarding the amplification of fluctuating wind and model errors, wind-induced swing displacement obtained through the current manual calculation method is smaller than that through the finite element method, which is one of the reasons for the frequent wind-induced swing flashover faults on transmission lines.

关键词(KeyWords)： 跳线;风偏闪络;故障统计;有限元分析;设计手册;计算方法
jumper wire;wind-induced swing flashover;accident statistics;finite element analysis;design manual;calculation method

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重点项目（51838012）

作者(Author): 陈科技,白航,楼文娟,张琳琳,陈赛慧
CHEN Keji,BAI Hang,LOU Wenjuan,ZHANG Linlin,CHEN Saihui

DOI: 10.19585/j.zjdl.202106010

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