特高压输电线路V型绝缘子串动力学特性数值仿真研究  

Numerical investigations of dynamic characteristics of V-insulator strings in UHV transmission lines by FEM

作　　者：赵芳瀷 张伟政[2] 季国剑[2] 耿力[3] 路国运[1] 张陵[3] 

机构地区：[1]太原理工大学应力所,太原030024 [2]国网河南省电力公司郑州供电公司,郑州450003 [3]西安交通大学机械结构强度与振动国家重点实验室,西安710049

出　　处：《应用力学学报》2016年第4期602-607,736,共6页Chinese Journal of Applied Mechanics

摘　　要：针对特高压输电线路使用的V型绝缘子串结构安全问题,用SAP2000软件对特高压输电线路V型绝缘子串串线耦合结构进行了动力学分析。首先,建立了基于索单元的两线一串等效有限元分析模型;其次探讨了绝缘子串的失效准则,提出了绝缘子串轴力和导线悬挂点位移是考量绝缘子串安全性的两个指标;然后,通过静力学分析研究了V型绝缘子串夹角变化对结构安全性的影响;最后用AR法生成随机脉动风场,通过风振响应分析研究了V型绝缘子夹角、风速、风攻角对绝缘子串最大轴力、导线最大张力和导线悬挂点的影响,指出了在设计绝缘子时应当综合考虑选取最优方案。本文研究结果为特高压输电线路V型绝缘子串结构安全设计与校核提供了分析依据和设计建议。Aimed at the safety of V-insulator strings in Ultra High Voltage(UHV) transmission lines, a dynamic analysis on coupling problem between V-insulator strings and wires is presented. Firstly, an effective model for a two wire-one V-insulator string is set up by finite element analysis. Secondly, the failure criterion of the insulator string is discussed, in which the axial force and the displacement of the hanging point are two safety indicators of the V-insulator string. Thirdly, influence of changing the V-insulator string angle on the structural safety is disclosed by static analysis. Finally, under a random wind field, responses of the maximum axial force, maximum wire tension and wire suspension, which are caused by the changes of the V-insulator string angle, wind speed and wind attack angle, are studied. Results obtained may provide analysis basis and design suggestions for safety design and check of V-insulator strings in UHV transmission lines.

关 键 词：V型绝缘子串 串线耦合 风振响应 结构优化 有限元数值分析 

分 类 号：TU311[建筑科学—结构工程]