高压变电站引下线系统在风冰载荷作用下的力学响应研究  

Research on Mechanical Response of Down Lead System of High Voltage Substation Under Strong Wind and Icing Conditions

作　　者：谢特列 许湧平 马钢[2] 郭栋才 刘占超 XIE Telie;XU Yongping;MA Gang;GUO Dongcai;LIU Zhanchao(China Energy Engineering Group Shanxi Electric Power Engineering Co.,Ltd.,Taiyuan,Shanxi 030001,China;College of Civil Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China)

机构地区：[1]中国能源建设集团山西省电力勘测设计院有限公司,山西太原030001 [2]太原理工大学土木工程学院,山西太原030024

出　　处：《广东电力》2021年第9期111-119,共9页Guangdong Electric Power

基　　金：中国能源建设集团科技项目(14-K2020-01-D01)。

摘　　要：变电站引下线系统在实际工程应用中常常遭受大风覆冰荷载耦合作用,导致引下线系统存在严重的安全隐患。目前对于引下线系统承受风冰荷载耦合作用的研究较少,为此,分析风荷载、风冰荷载耦合作用对高压变电站引下线系统的力学响应,通过有限元模拟建立高压变电站中引下线系统的原尺寸模型,探究风速、覆冰厚度和导线类型对引下线系统内部应力分布特征及其受力薄弱构件的力学响应特征的影响。结果表明:在风荷载、风冰荷载作用下,体系受力最薄弱构件分别为T型线夹和设备端子,其最大应力分别发生在线夹连接口内壁处和端子板与接线柱连接处,二者无法满足在不小于20 m/s风速、不小于25 mm厚度的覆冰作用下结构体系的安全性要求;在风荷载、风冰荷载作用下,采用JLHN58K-1600型导线可分别有效降低构件65%以上、45%以上的峰值应力,因此,进行引下线结构体系优化,可确保系统安全可靠地运行。The down lead system of the substation is often subjected to the coupling effect of high wind and icing load in practical engineering applications,which leads to serious safety risks.At present,there are few studies on the coupling effect of wind-icing load on the down lead system.Therefore,this paper analyzes mechanical response of the action of wind load and wind-icing load on the down lead system of the high voltage substation.By using finite element simulation,it establishes an original size model of the down lead system so as to discuss the effects of wind speed,icing thickness and conductor types on the internal stress distribution characteristics of the down lead system and the mechanical response characteristics of the weakly stressed components.The results show that under the action of wind load and wind-icing load,the weakest components of the system are T-shaped clamps and device terminals respectively.The maximum stress of the T-type clamp and the device terminal occurs at the inner wall of the clamp connection port and the connection between the terminal board and the terminal post respectively.Neither of them can meet the safety requirements of structural systems under the action of wind speed not less than 20 m/s and icing thickness not less than 25 mm.Under wind load and wind-icing load,JLHN58K-1600 wire can effectively reduce the peak stress of members by more than 65%and more than 45%respectively.Thus,it is able to ensure the safe and reliable operation of the system by optimizing the lead down structure system.

关 键 词：变电站 引下线系统 力学响应 风荷载 覆冰荷载 

分 类 号：TM752[电气工程—电力系统及自动化] TB115[理学—数学]