跨越线路绝缘子串脱冰动张力特性仿真分析  

Analysis of Dynamic Tension Characteristics of Insulator String under Ice-Shedding

作　　者：杨晓辉 张博 宋阳 胡鑫 YANG Xiao-hui;ZHANG Bo;SONG Yang;HU Xin(State Grid Henan Electric Power Company Electric Power Research Institute,Zhengzhou Henan 450052,China;Department of Mechanical Engineering,North China Electric Power University,Baoding Hebei 071003,China)

机构地区：[1]国网河南省电力公司电力科学研究院,河南郑州450052 [2]华北电力大学机械工程系,河北保定071003

出　　处：《计算机仿真》2022年第8期104-108,共5页Computer Simulation

基　　金：国家电网有限公司总部科技项目资助(52170218000G)。

摘　　要：严重覆冰导线的受力特性,对于复杂跨越架空线路的设计和安全运行都有重要的意义。以某220kV交叉跨越线路为工程背景,通过分段建模法建立“耐-直-耐”跨越线路的塔线系统有限元分析模型,采用ANSYS单元“生死”法模拟架空导线的脱冰过程,分析计算“耐-直-耐”跨越线路绝缘子串在不同脱冰情况下的动态响应,着重讨论线路中的绝缘子串的受力的动态变化规律。研究结果表明,覆冰厚度和脱冰量的增加均会造成绝缘子串动张力波动幅度增大;相对于其它位置脱冰,跨越档中间位置脱冰绝缘子串动张力波动幅度更大,对金具受力影响较大;脱冰工况下悬垂串球头挂环处受到的应力最大,和现场实际断裂位置一致。The stress characteristics of severely iced conductors are of great significance for the design and safe operation of complex crossing overhead lines.In this paper,a 220kV cross-over line was used as the engineering background to establish a finite element analysis model of the“tolerant-straight-tolerant”cross-over tower line system.The ANSYS unit“life and death”method was used to simulate the de-icing process of overhead conductors.The dynamic response of“straight-endurance”crossing lines under different de-icing conditions focuses on the dynamic change of the stress on the insulator strings in the line.The research results show that the increase in the thickness of ice coating and the amount of de-icing can increase the amplitude of the string tension of the insulator;Compared with de-icing at other positions,the de-icing insulator across the middle position of the gear has a greater fluctuation in the tension tension,which has a greater impact on the hardware;The stress at the joint of the hanging ball head suspension ring under the de-icing condition is the largest,which is consistent with the actual measured fracture position.

关 键 词：输电线路 脱冰跳跃 动张力 塔线系统 绝缘子 

分 类 号：N945.12[自然科学总论—系统科学] TP391.9[自动化与计算机技术—计算机应用技术]