电瓷避雷器Issue(5)：83-91,9.DOI:10.16188/j.isa.1003-8337.2025.05.011
下击爆流下导线及绝缘子自振频率对输电线路风偏影响研究
Influence of Natural Vibration Frequency of Conductor and Insulator String on Wind Deflection of Transmission Line Under the Downburst current
摘要
Abstract
It is very important to analyze the wind deflection response of transmission lines under the downburst current for the safe operation of transmission lines.The coupling model of transmission tower-conductor-insulator strings with 21 different conductor lengths and 24 different types of insulator strings is established,by inputting the wind field of different height and different horizontal distance into these models,the wind deflection responses of these transmission lines are analyzed.The results show that the ratio of wind deflection angle to no-consider is between 1.34 and 2.75 at the design wind speed of 27 m/s.As the natural vibration frequency of the conductor and insulator string increases,the change in wind deflection angle shows a normal distribution pattern,with the maximum response occurring between the natural vibration frequency of the conductor and insulator string between 0.34～0.42 Hz.When the distance between the center of jet and the insulator string is z＜0.037 Djet,the wind deflection angle in-creases rapidly with the increase of z,when Z＞0.037 Djet,the wind deflection angle decreases slowly with the increase of Z,and the maximum response occurs between z=0.34～0.42 Djet.For r＜1.01 Djet,the wind deflection angle increases rapidly with the increase of r,while for r＞1.01 Djet,the wind deflection angle e decreases slowly with the increase of r,and the maximum response occurs between r=0.71～1.11 Djet.关键词
下击爆流/输电线路/导线自振频率/绝缘子串自振频率/风偏响应Key words
downburst current/transmission line/conductor natural vibration frequency/insulator string natural vibration frequency/deflection response引用本文复制引用
屈子淇,张有佳..下击爆流下导线及绝缘子自振频率对输电线路风偏影响研究[J].电瓷避雷器,2025,(5):83-91,9.基金项目
国家自然科学基金(编号:51508074) （编号:51508074）
国网内蒙古东部电力有限公司建设分公司项目(编号:SGTYHT/21-JS-223).Project supported by National Natural Science Foundation of China(No.51508074) （编号:SGTYHT/21-JS-223）
State Grid Inner Mongolia Eastern Power Co.,Ltd.Construction Branch Project(No.SGTYHT/21-JS-223). （No.SGTYHT/21-JS-223）
