特高压电网不等高差短导线的受力性能  

Stress performance analysis of short conductors with unequal height difference in UHV network

作　　者：信珂[1] 刘欣悦 王乐天[1] 马会环 金耕涛 XIN Ke;LIU Xinyue;WANG Letian;MA Huihuan;JIN Gengtao(Shandong Electric Power Engineering Consulting Institute Co.,Ltd.,Jinan 250013,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)/School of Civil Engineering,Sun Yat-sen University,Zhuhai 519082,China)

机构地区：[1]山东电力工程咨询院有限公司,山东济南250013 [2]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090 [3]中山大学土木工程学院/南方海洋科学与工程广东省实验室(珠海),广东珠海519082

出　　处：《中山大学学报（自然科学版）（中英文）》2024年第1期105-112,共8页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：山东电力工程咨询院有限公司资助项目(37-2022-34-K0016);国家重点研发计划子课题(2018YFC0705504-5)。

摘　　要：目前中国的特高压电网技术得到了快速发展。然而,工程中常由于忽视对导线受力性能的分析而酿成绝缘事故。根据导线两端挂线点的空间位置,其连接方式可分为等高差导线连接和不等高差导线连接。为此,本文提出了一种计算不等高差短导线端子在不同方向上受力性能的经验公式。通过改变挂线点之间的水平间隔距离、竖直高度差两个因素,开展了不同空间布局组合状态下的导线端子的受力特性分析,提出了可供设计参考的导线端部力学分析公式。结果表明经验公式具有良好的工程适用性。导线两端的受力特性不仅与环境荷载有关,与导线型号、两端竖直高度差、两端水平间隔距离等因素有关。China is vigorously developing related technologies of ultra-high voltage power grids at the present stage.However,due to the neglect of the analysis of conductors'mechanical performance,insulation accidents are easily caused in engineering.According to the different relative positions of the suspension points at both ends of the conductor,it can be divided into equal height difference and unequal height difference connection.Therefore,this paper presents an empirical formula for calculating the mechanical properties of short conductor terminals with unequal height difference in different degree of freedom.The stress state of short conductor under the condition of unequal height difference is analyzed.By changing the distance,height difference and angle of wire clamp between suspension points,the force characteristics of terminals in different directions are summarized,and an empirical formula for design reference is derived.The results show that the empirical formula has good engineering applicability.The force at the terminal of the conductor is not only related to the external load,but also related to the distance,height difference,type of the conductor and the angle of the wire clamp used at the terminal.

关 键 词：刚度效应 导线模型 不等高差 短导线 电力系统 

分 类 号：TU3[建筑科学—结构工程]