钢芯铝绞线股丝分层应力计算方法的研究  

Study on Calculation Method of Layered Stress of Steel Core Aluminum Stranded Wire

作　　者：杨光耀 温作铭 顾乡 吴明埝 尤伟任 徐欣 YANG Guangyao;WEN Zuoming;GU Xiang;WU Mingnian;YOU Weiren;XU Xin(East China Electric Power Design Institute Co.,Ltd.,Shanghai 200063,China;Jiangsu Zhongtian Technology Co.,Ltd.,Nantong 226400,China;Shanghai Zhongtian Aluminum Wire Co.,Ltd.,Shanghai 201108,China;State Grid Jinan Zhangqiu Power Supply Company,Jinan 250200,China)

机构地区：[1]中国电力工程顾问集团华东电力设计院有限公司,上海200063 [2]江苏中天科技股份有限公司,南通226400 [3]上海中天铝线有限公司,上海201108 [4]国网山东省电力公司济南市章丘区供电公司,济南250200

出　　处：《电线电缆》2023年第3期40-45,共6页Wire & Cable

基　　金：中国能源建设集团规划设计有限公司科研资助项目(GSKJ2-D03-2020)。

摘　　要：准确评估导线的股丝分层应力可为架空输电线路工程设计、导线选型提供理论依据和指导。以钢芯铝绞线为研究对象,考虑每一层股丝的温度、节径比、泊松比、弹性模量及线膨胀系数等因素的影响,再根据导线整体轴向张力进行修正,提出了一种钢芯铝绞线股丝分层应力的计算方法,并采用二分法进行求解。在不同张力下,对钢芯铝绞线进行分层应变、应力试验,根据超弱光纤的应变导致反射光波长改变的原理进行测量,验证了所提计算方法的有效性。最后,针对工程中的导线选型问题,对不同导线进行分层应力计算,为工程设计提供理论参考。It is necessary to evaluate the strand delamination stress accurately in order to provide guidance for overhead transmission lines engineering design.Steel-cored aluminum stranded wire was taken as research object,considering the influence of the temperature,pitch diameter ratio,Poisson's ratio,elastic modulus,linear expansion coefficient and other factors,and then it was corrected according to overall axial tension of the wire.A method for calculating the layered stress of strands was proposed,and it was solved by dichotomy.The layered stress tests of the steel-cored aluminum stranded wire were performed under different tensions,and the measurement was based on the principle that the wavelength of the reflected light wave changes due to the strain of the optical fiber,which verified the effectiveness of the proposed algorithm.Finally,the stress calculation of the layered aluminum part of the wires was used in actual projects,and the results can provide theoretical reference for engineering design.

关 键 词：钢芯铝绞线 导线选型 股丝应力 分层应力 

分 类 号：TM751[电气工程—电力系统及自动化]