摘要
为了掌握同塔双回线路大档距导线非均匀脱冰跳跃特性,以某220 kV同塔双回线路为研究对象,考虑导线、绝缘子串和间隔棒等构件的力学特点,设置导线阻尼和边界条件,建立五档同塔双回线路大档距二分裂导线覆冰有限元模型,分析脱冰档随机脱冰时导线脱冰跳跃高度时程变化,研究脱冰率、导线型号、脱冰档、风速对导线脱冰跳跃高度的影响规律,校核双回线路的动态脱冰电气间隙。结果表明:线路脱冰率越大,导线脱冰跳跃高度越大,但相同脱冰率下,随机脱冰位置不同,导线跳跃高度并不相同;双回线路导线脱冰跳跃稳态值与峰值呈现一定的线性关系,脱冰跳跃峰值约是稳态值的1.70倍;线路导线直径越大,导线脱冰跳跃高度越小;相比于边档脱冰,五档双回线路中档脱冰时导线脱冰跳跃高度峰值最大;风速越大导线跳跃高度越大,但是导线跳跃高度增幅有限;该220 kV同塔双回线路脱冰动态间隙满足要求。
In order to master the uneven deicing jumping characteristics of long span conductors of the double circuit lines on the same tower,based on a 220 kV double circuit line on the same tower and considering the mechanical characteristics of conductors,insulator strings,spacer bars and other components,this paper sets the conductor damping and boundary conditions and establishes a finite element model for icing of the long span two bundle conductors of the double circuit lines on the same tower with five spans to analyze the variations of random deicing jump height time histories of the conductors.It also studies the effects of random deicing rates,wire types,deicing spans and wind speeds on the ice jumping heights of the conductors,as well as checks dynamic deicing electric clearance of the double circuit lines.The results show that the greater the line deicing rate is,the greater the conductor deicing jump height is.However,under the same deicing rate,the random deicing positions are different,the jumping heights of the conductors are different.The steady-state value of the conductor deicing jumping shows a certain linear relationship with the peak value.The larger the diameter of the line conductor,the smaller the jumping height of the conductor deicing.Compared with the side span deicing,the peak value of conductor deicing jumping height is the largest in the middle span deicing of the double circuit line with five spans.The higher the wind speed is,the higher the jumping height of the conductor is,but the increase of the jumping height is limited.The dynamic deicing clearance of the 220 kV double circuit line on the same tower meets the requirements.
作者
杨运国
汤春俊
左立刚
麻坚
陈晖
YANG Yunguo;TANG Chunjun;ZUO Ligang;MA Jian;CHEN Hui(Jinhua Electric Power Design Institute Co.,Ltd.,Jinhua,Zhejiang 321000;State Grid Zhejiang Electric Power Co.,Ltd.Jinhua Power Supply Company,Jinhua,Zhejiang 321000)
出处
《广东电力》
2023年第6期76-84,共9页
Guangdong Electric Power
基金
国网浙江省电力有限公司集体企业科技项目(B12)。
关键词
同塔双回线路
大档距导线
有限元模型
随机脱冰
跳跃高度
double circuit transmission line on the same tower
long span conductor
finite element model
random deicing
jumping height
