一起750kV输电线路风偏跳闸原因分析及改造措施研究  

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

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

机构地区：[1]国网新疆电力公司,乌鲁木齐830000 [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供电公司,乌鲁木齐830011

出　　处：《电瓷避雷器》2017年第2期168-173,179,共7页Insulators and Surge Arresters

摘　　要：通过一起750 kV输电线路风偏跳闸事故,首先采用解析法对杆塔风偏后电气间隙距离进行了计算,得出引起跳闸的危险风偏角。然后根据规程法对风偏角进行了计算,计算结果表明,31 m/s设计的杆塔风偏安全裕量不足,其裕量仅为5°,在1.1倍设计风速下就会发生风偏闪络。最后根据现场在线监测装置监测风速的标准风速和极大风速进行对比,认为引起输电线路风偏跳闸的原因主要是极大风速。对于需要进行防风改造的杆塔,分析了各种防风偏措施及其适用范围,建议采用加装防风偏拉线的解决措施,以提高输电线路的抗风能力,提高电网的安全运行水平。The analysis of a 750 kV transmission line wind biased tripping accidents in the wind section of the transmission line are biased assessment of wind. First, analytical method after biased clearance from the wind towers are calculated the risk of tripping caused by hazard wind angle. Then according to law regulations the wind angle are calculated, the calculation results show that, the safety margin of wind biased of tower designed 31 m/s is insufficient, its margin is only 5 degrees, at 1.1 times the design wind speed wind biased flashover occurs. Finally, compare the online monitoring device according to the site to monitor wind speed and procedures law that cause power lines wind biased reason for the trip is mainly the maximum wind speed. The need for transformation of the wind tower, wind analyzes various biased measures and their scope, the proposed installation of wind cable of solutions to improve the wind resistance of transmission lines, improve the level of safe operation of the power 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：TM75[电气工程—电力系统及自动化]