The Study of UHV 8-Bundled Conductor Galloping and Its Prevention Technology
As the development of power transmission technology,the AC 1000kV UHV projects have beenput into operationfrequently in recent years.The number of bundled conductors isup to 8,andthewhole structure of transmission lineis very large.The structure expansion of transmission line means that,thewind loadwould increase radically.Galloping is a very typical wind-induced vibration for overhead power transmission linein winter with conductor ice-accretion,whichhad causedelectrical-tripping,structure damageand even tower collapse.For transmission line in galloping area,takinganti-galloping measures becamevery important.As for the 8-bundled conductors in UHV project,it is quite essentialtostudy the galloping character and prevention measures,which isthe basis forguaranteepower transmission in safe.In this paper,the aero-dynamic character of 8-bundled conductors had been studied by model test in wind tunnel,theinfluenceofbundled number,accreted-ice shape and the wake effects between sub-conductorsbeen foundthrough the series tests and data analysis.Based on the result of wind-tunnel tests,the full-scale8-bundled galloping test line had been stimulated to galloping frequentlywith natural wind.According to the field record of test line galloping,some critical parameters,such asfrequency,amplitude,galloping loops and theconductor dynamic tension etc.,beanalyzed,whichbevaluable for anti-galloping measures.According to the galloping characteranalyzed by fieldtest,someanti-galloping measuresfor UHVtransmission line had beencompared anddiscussed inthis paper.
UHV 8-bundled conductor ice-accreted wind-tunnel test galloping full-scale transmission line split type spacer ground-phase inter-spacer in anchored type
YANG Xiaohui LV Zhongbin ZHAO Shujie LOU Wenjuan
Henan electric power research institute,No.85 of Songshan Road(South),Zhengzhou,China Zhejiang University,No.668 of Yuhangtang Road,Hangzhou,China
国际会议
重庆
英文
1-8
2017-09-25（万方平台首次上网日期，不代表论文的发表时间）