750kV输电线路风偏跳闸原因分析及改造措施研究  

Analysis and Reform Measures of 750kV Transmission Line Wind Biased Tripped

作　　者：杨肖辉[1] 张东[2] 李晓光[2] 董新胜[2] 张振泉[3] 陈艳超[1] 

机构地区：[1]国网新疆电力公司乌鲁木齐供电公司,乌鲁木齐830011 [2]国网新疆电力公司电力科学研究院,乌鲁木齐830011 [3]国网新疆电力公司,乌鲁木齐830000

出　　处：《电气工程学报》2017年第1期40-46,共7页Journal of Electrical Engineering

摘　　要：为了查明750kV输电线路风偏跳闸的主要原因,采用解析法对绝缘子风偏后不同角度下的间隙距离进行分析,找出引起线路跳闸的风偏角。然后利用规程法对风偏角进行计算,得出设计风速31m/s的杆塔风偏安全裕量仅为5°,现场风速达到1.1倍设计风速下就会发生风偏跳闸。同时通过分析现场监测风速发现现场标准风速最大为27.5m/s,极大风速最大为40.5m/s,得出造成风偏跳闸的主要原因为极大风速超过设计风速的结论。最后针对需要改造的杆塔分析了输电线路防风偏措施的优缺点,得出750kV输电线路建议采用防风拉线型防风措施的结论,并对防风拉线选型进行了分析。通过防风改造有利于提高750kV输电线路的抗风能力,提高电网的安全运行水平。In order to analyze the main reasons 750kV transmission line partial wind trip through analytical method for the insulator gap after the partial wind at different angles from the line to find the cause of the trip the wind angle. Then use the procedure law wind angle it calculated the design wind speed 31 m/s tower wind partial safety margin of only 5 degrees, scene design wind speed reaches 1.1 times the wind speed wind occur partial trip. By analyzing the scene found the scene monitoring the wind speed with a speed of up to 27.5m/s, maximum wind speed up to 40.5m/s, the main cause of air drawn partial trip for maximum wind speed exceeds the design wind speed conclusions. Finally, the need for transformation of the transmission line towers analyze the advantages and disadvantages of partial measures of wind, come 750kV transmission line is recommended pull-type wind measure wind conclusions, and the wind cable selection were analyzed. Wind through the transformation will help improve wind resistance 750kV transmission line to improve the level of safe operation of the grid.

关 键 词：风偏 跳闸 危险风偏角 标准风速 极大风速 防风拉线 

分 类 号：TM86[电气工程—高电压与绝缘技术]