220kV架空分裂导线的应力动态分析  

Dynamic analysis on stress of overhead bundle conductor

作　　者：雷鸣[1] 刘刚[1] 杨挺[2] 

机构地区：[1]华南理工大学电力学院,广东广州510640 [2]中国南方电网有限公司,广东东莞523000

出　　处：《电工电能新技术》2009年第3期50-53,共4页Advanced Technology of Electrical Engineering and Energy

基　　金：国家重点基础研究发展计划(973计划)(2009CB724507)

摘　　要：为了更好地评估过电流对水平排列导线伸长、导线间距的影响,研究了导线间距与电磁力相互作用的机理。通过建立输电线路为抛物线模型,利用模型计算导线电磁力、导线长度、导线拉应力,并分析计算拉应力、电流等因素对分裂子导线导线伸长、间距的影响。继而利用数值计算软件求出不同状态下子导线最小间距,并分析不同电流对导线间最小距离的影响,综合以上分析,建立过电流下导线伸长动态模型。基于以上分析可知:各种因素对导线伸长和最小间距存在影响,伸长与电磁力相互促进;动态模型显示导线伸长过程中各种参数变化,与导线粘连临界状态参数进行比较以判定导线粘连,并提出相应预防粘连的措施。In order to better assess the level of over-current affects on arranged wires elongation and wire spacing, the interaction mechanism between wire spacing and the electromagnetic force is studied. Through the establishment of the parabola model for a transmission line, the model is used to calculate wire electromagnetic force, wire length, wire tensile stress and to analyze the effects of factors of current and tensile stress on wire stretch and spacing. Then the use of numerical simulation software obtains the smallest wire spacing in different situations, and analyzes the effects of current of conductor on the shortest distance. By the use of the above comprehensive analysis, the dynamic model of elongation under the over-current is established. Based on the above analysis we can see： a variety of factors can have the effects on the elongation and minimal space, and electromagnetic force and elongation have mutual effects on each other; dynamic conductor model shows the parameters change in the process, and wire critical conglutination parameters are compared to determine the wire conglutination, and measures to prevent conglutination are proposed.

关 键 词：过电流 导线粘连 最小间距 动态模型 临界状态 参数变化 

分 类 号：TM75[电气工程—电力系统及自动化]