多工况500 kV输电线路绝缘子风偏特性  

Windage Yaw Characteristics of 500 kV Transmission Line Insulators Under Multiple Operating Conditions

作　　者：赵国 祝和平 李树林 宋昊然 ZHAO Guo;ZHU Heping;LI Shulin;SONG Haoran(School of Electrical and Electronic Engineering,Hubei University of Technology,Wuhan 430068,China;Hubei University of Technology Key Laboratory of Solar Energy Efficient Utilization and Energy Storage Operation Control,Wuhan 430068,China)

机构地区：[1]湖北工业大学电气与电子工程学院,武汉430068 [2]湖北工业大学太阳能高效利用及储能运行控制湖北省重点实验室,武汉430068

出　　处：《电瓷避雷器》2025年第1期107-117,共11页Insulators and Surge Arresters

摘　　要：为探究输电线路绝缘子风偏特性,搭建了某地区500 kV输电线路4档耐张段输电杆塔-串-线耦合有限元模型,分别对直线塔悬垂绝缘子串和耐张塔跳线绝缘子串进行了稳态风况与脉动风况的风偏角计算。稳态风速设置为该地区雷电过电压工况(15 m/s)、操作过电压工况(20 m/s)、大风工况(35 m/s),分析了临界风速下档距、高差和风攻角对直线塔悬垂绝缘子风偏角的影响以及串长和风攻角对耐张塔跳线绝缘子风偏角的影响,并结合平均风速为35 m/s的脉动风况与不同降雨强度对该线路进行了脉动风偏响应分析。研究结果显示档距与串长的改变对线路绝缘子风偏角的影响不大,而高差与风攻角的改变对线路风偏影响较大,且雨荷载对线路绝缘子风偏角有放大作用。最后,本研究校核了该地区3种工况下的风偏结果,为保证输电线路安全、稳定运行,应使该线路直线塔的设计Kv值大于0.94,如此悬垂绝缘子风偏角在大风工况时能满足最小电气间隙的要求。In order to explore the windage yaw characteristics of transmission line insulators,a finite element model of transmission tower-string-line coupling of four-span strain section of 500 kV transmission line in a certain area was established.The windage yaw angles of suspension insulator string of straight tower and jumper insulator string of strain tower under steady wind condition and fluctuating wind condition were calculated respectively.The steady-state wind speed is set to the lightning overvoltage condition(15 m/s),the switching overvoltage condition(20 m/s)and the strong wind condition(35 m/s)in this area.The influence of span,height difference and wind attack angle on the wind deflection angle of suspension insulator of straight line tower and the influence of string length and wind attack angle on the wind deflection angle of jumper insulator of tension tower under critical wind speed are analyzed.Combined with the fluctuating wind condition with average wind speed of 35 m/s and different rainfall intensity,the fluctuating wind deflection response analysis of the line is carried out.The results show that the change of span and string length has little effect on the wind deflection angle of line insulator,while the change of height difference and wind attack angle has great influence on the wind deflection angle of line insulator,and the rain load has amplification effect on the wind deflection angle of line insulator.Finally,the windage yaw results under three working conditions in this area are checked.In order to ensure the safe and stable operation of the transmission line,the design Kv value of the straight tower of the line should be greater than 0.94,so that the wind deflection angle of the overhanging insulator can meet the requirements of the minimum electrical gap under strong wind conditions.

关 键 词：500 kV输电线路 临界风速 风偏特性 风偏校核 

分 类 号：TM216[一般工业技术—材料科学与工程]