摘要
特高压可控金属氧化物避雷器是变电站电气设备重要组成部分,为了研究其抗震性能,分别建立可控避雷器带减震和不带减震装置模型,计算分析在静载荷和地震载荷作用下的形变和应力分布,进而进行安全性能评估。计算结果表明:风载荷对于避雷器结构整体位移影响较小,可控避雷器不装设和装设减震装置结构顶部的位移分别为32.8、3.28 mm。减震器通过提供设备附加阻尼的方式实现减震控制,导致带减震和不带减震两种避雷器结构频率分布具有一致性。当加速度为0.3 g时,带减震避雷器的总位移和瓷套的最大应力分别为49.35 mm和4.48 MPa,不带减震避雷器的总位移和瓷套的最大应力分别为210.06 mm和15.1 MPa。当避雷器安装减震装置后,抗震性能提升明显,能够较大程度降低地震工况下避雷器根部的应力,提高可控避雷器的可靠性。
UHV controllable metal oxide surge arrester is an important part of substation electrical equipment.In order to study its aseismic performance,a controllable arrester model with and without shock absorbers is established to calculate and analyse of deformation and stress distribution under static loading and aseismic loading,then evaluating the safety performance.Calculation results show that the wind load has little effect on the overall displacement of the arrester structure.The displacement of the top of the controlled arrester with and without the damping device is 32.8 mm and 3.28 mm respectively.The shock absorber achieves damping control by providing additional damping to the device,which results in the consistency of the frequency distribution between the structures with and without shock absorber.When the acceleration is 0.3 g,the total displacement of the shock absorber and the maximum stress of the porcelain sleeve are 49.35 mm and 4.48 MPa,respectively.The total displacement of the shock absorber and the maximum stress of the porcelain sleeve are 210.06 mm and 15.1 MPa,respectively.Under the action of earthquake acceleration,when the arrester is installed with shock absorber,the aseismic performance is improved obviously,and the stress at the root of the lightning arrester can be reduced to a great extent under earthquake conditions,the reliability of controllable arresters has been improved.
作者
郭伟林
陈维江
陈秀娟
向奕同
董冰冰
时卫东
赵玉顺
GUO Weilin;CHEN Weijiang;CHEN Xiujuan;XIANG Yitong;DONG Bingbing;SHI Weidong;ZHAO Yushun(School of Electrical and Automation Engineering,Hefei University of Technology,Hefei 230009,China;State Grid Corporation of China,Beijing 100031,China;China Electric Power Research Institute Corporation,Beijing 100192,China;Shibei Electric Power Supply Branch Company,State Grid Chongqing Electric Power Company,Chongqing 401147,China)
出处
《高压电器》
CAS
CSCD
北大核心
2020年第11期181-187,共7页
High Voltage Apparatus
基金
博士专项资助基金(JZ2018HGBZ0088)。
关键词
特高压
可控避雷器
抗震
减震装置
应力
安全性能
UHV
controllable arrester
aseismic
shock absorber
stress
safety performance
