摘要
为研究直流融冰过程中架空线的振动特性,在考虑温度效应的影响下,分析了两端线夹为存扭边界且扭转系数可变的架空线振动特性。利用静力平衡原理,以悬链线方程为基础,结合直流融冰过程中架空线产生的温度应力进行几何找形,推导出架空线平衡方程,并利用分离变量法,求解架空线运动方程。以500kV交流架空线LGJ-500/45和LGJ-400/50为研究对象,利用Matlab求解架空线的运动状态,并通过有限元软件ANSYS建立了架空线有限元模型,证明了理论分析的准确性。
In this paper,the vibration characteristics of over-head transmission lines during DC melting process are studied.Under the influence of temperature effect,the vibration characteristics of over-head transmission lines with the twisted boundary at both ends are analyzed.Based on the principle of static force balance,and the catenary equation,combined with the temperature stress generated by the over-head transmission line during DC ice melting,geometric shape finding is carried out,the equilibrium equation of over-head transmission line is derived,and the equation of motion of over-head transmission line is solved by using the separation variable method.Taking the 500kV AC over-head lines LGJ-500/45and LGJ-400/50as the research object,the motion state of the over-head transmission line is solved by matlab,and the tensile strength is established by the finite element software ANSYS,which proves the accuracy of theoretical analysis.
作者
冯文斌
虢韬
郭鑫
杨刘贵
严尔梅
魏培权
王璐
祝贺
FENG Wenbin;GUO Tao;GUO Xin;YANG Liugui;YAN Ermei;WEI Peiquan;WANG Lu;ZHU He(Transmission and Maintenance Branch of Guizhou Power Grid Co.,Ltd.,Guiyang 550002,China;Northeast Electric Power University,Jilin 132012,China)
出处
《吉林电力》
2020年第3期11-14,19,共5页
Jilin Electric Power
基金
吉林省科技发展计划项目(20180201016SF)
中国南方电网有限责任公司科技项目(067500KK52170039)。
关键词
直流融冰
温度效应
振动特性
架空输电线
扭转系数
DC ice melting
temperature effect
vibration characteristics
over-head transmission lines
torsion coefficient