基于CR法的覆冰四分裂导线断线的算法研究  

Algorithm for the breakage of ice-covered quad bundle conductors based on CR method

作　　者：鲁佳帛 刘小会[1] 吕中兵 黄瞻 范理 吴海涛 陈思危 LU Jiabo;LIU Xiaohui;L Zhongbing;HUANG Zhan;FAN Li;WU Haitao;CHEN Siwei(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;State Key Laboratory of Bridge and Tunnel Engineering in Mountain Areas,Chongqing Jiaotong University,Chongqing 400074,China;Henan Electric Power Research Institute,Zhengzhou 450052,China;Chongqing Electric Power Research Institute,Chongqing 404100,China;State Grid Chengdu Electric Power Company,Chengdu 610021,China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]重庆交通大学省部共建山区桥梁及隧道工程国家重点实验室,重庆400074 [3]国网河南电力公司电力科学研究院,郑州450052 [4]国网重庆电力公司电力科学研究院,重庆404100 [5]国网成都供电公司,成都610021

出　　处：《振动与冲击》2024年第22期318-325,共8页Journal of Vibration and Shock

基　　金：重庆市自然科学基金面上项目(cstc2021jcyj-msxmX0166);重庆市研究生导师团队建设项目(JDDSTD022003)。

摘　　要：为了更快速、准确地分析覆冰分裂导线的断线工况,基于Co-rotational法开发了梁、杆单元的有限元模型。首先,提出了“节点失效”的断线有限元实现方法,并与试验对比验证了方法的可靠性;随后,通过C++语言编写了该有限元程序,通过QT以及VTK工具包实现了程序的可视化;最后,建立了三档覆冰四分裂有限元模型,针对该有限元模型研究了不同覆冰厚度、不同断线位置对子导线的张力及对间隔棒弯矩的影响。结果表明,间隔棒在子导线断裂时承受额外力矩,并且未断导线在间隔棒附近出现最大张力值,该张力沿导线向远离断点位置递减至正常运行水平。在覆冰情况下,单子导线和双子导线的断线最大张力都与覆冰厚度呈线性增加;当三根子导线断裂时,将导致所有子导线断裂;而当四根子导线全部断裂时,可以简化为单导线的计算。该模拟结果可为输电线路设计和故障分析提供参考,提出的断线模拟方法可为导线断线的仿真提供了一种可靠的有限元实现方法。In order to analyze the disconnection conditions of ice-covered split wires more quickly and accurately,a finite element model of beam and rod elements was developed based on the co-rotational(CR)method.A finite element implementation method for the disconnection of“node failure”was proposed,and the reliability of the method was verified by comparison with experiment results.The finite element program was written in C++language,and the program was visualized through QT and VTK toolkits.Finally,a three-level ice-coated four-split finite element model was established.Based on this finite element model,the effects of different ice coating thicknesses and different disconnection positions on the tension of the sub-conductors and the bending moment of the spacer rods were studied.The results show that the spacer rods bear additional torque when the sub-conductor breaks,and the maximum tension value of the unbroken conductor occurs near the spacer rod,and the tension decreases successively to the normal operating level along the conductor away from the break point.In the case of ice coating,the maximum tension of single sub-conductor and twin sub-conductors increases linearly with the ice coating thickness.When three sub-conductors break,all sub-conductors will break,and when all four sub-conductors break,it can be simplified to a single sub-conductor in the calculation.The simulation results provide a reference for transmission line design and fault analysis.The proposed wire breakage simulation method provides a reliable finite element implementation method for the simulation of wire breakage.

关 键 词：四分裂导线 导线断线 覆冰导线 

分 类 号：TU311.3[建筑科学—结构工程]