摘要
输电线路脱冰跳跃会使导线大幅度上下摆动,对绝缘子串、金具、铁塔等造成较大的动态拉力,可能引起机械事故,而输电线路脱冰跳跃动态响应剧烈程度与悬跨比有关。为此搭建耐张段输电线路脱冰跳跃试验平台,进行不同悬跨比下均匀脱冰试验。首先利用位移采集模块及动态张力采集模块获得导线脱冰跳跃动态响应数据;继而采用集中荷载法,分析脱冰跳跃最大高度、振动幅值衰减特性,研究动态张力及其衰减特性,探讨悬跨比对脱冰跳跃响应的影响。实验结果表明,增加悬跨比可使导线跳跃能力减弱,能量消散加快,从而提高线路抗冰能力。
Ice-shedding jump of the transmission lines may cause sharply vibration up and down of the conductor and give rise to great dynamic tension of insulator strings,fittings and towers,which is likely to lead to mechanical accidents.The dynamic response of the transmission line after ice-shedding is related to the sag-to-span ratio(SSR).Therefore,this paper establishes a test platform for ice-shedding jump of the tension resistance section of the transmission line for carrying out uniform ice-shedding tests under different SSRs.It firstly uses the displacement acquisition module and the dynamic tension acquisition module to obtain dynamic response data of ice-shedding.Secondly,by using the concentrated load method,it analyzes the maximum ice-shedding jump height and vibration amplitude attenuation characteristic,studies dynamic tension and the attenuation characteristic,and discusses influence of SSR on ice-shedding jump response.The test results indicate it is able to weaken jump ability of the conductor and accelerate energy dissipation by increasing the SSR,so as to improve anti-icing ability of the transmmision line.
作者
冯展浩
阳林
郝艳捧
李立浧
FENG Zhanhao;YANG Lin;HAO Yanpeng;LI Licheng(School of Electric Power Engineering,South China University of Technology,Guangzhou,Guangdong 510641,China)
出处
《广东电力》
2020年第2期125-130,共6页
Guangdong Electric Power
基金
国家自然科学基金委员会-国家电网有限公司智能电网联合基金重点项目(U1766220)
关键词
输电线路
脱冰跳跃
动态位移
动态张力
悬跨比
transmission line
ice-shedding
dynamic displacement
dynamic tension
