摘要
特高压套管具有较高的地震易损性,是变压器整体结构抗震性能的薄弱环节,其抗震能力直接影响着特高压变电站整体的抗震设防水准。该研究对1支1 100 k V特高压套管进行地震模拟振动台试验,通过输入白噪声随机波和人工标准时程波,测定套管的动力特性和关键部位的应变、加速度等地震响应。试验结果显示,套管瓷件部分最大应力低于瓷质材料破坏值,但套管金属部位安装法兰发生破坏,不满足设计基本地震加速度为3 m/s2的抗震设防要求。试验结果表明:在重视瓷件部分抗震性能的同时,应采取构造连接措施提高套管金属部件的刚度,从而提高设备整体的抗震性能,保证变电站抗震安全。
UHV Transformer which has high seismic vulnerability is the key device of UHV project, and it may bring serious economic losses when the device is damaged in an earthquake. As the weak position in the seismic performance of the transformer, the seismic capacity of UHV bushing directly affects the seismic fortification level of UHV substation. In this study, one 1 100 kV UHV bushing was tested by shaking table. The dynamic characteristics and seismic response such as strain and acceleration of the key parts of the UHV bushing were obtained by the input of white noise wave and standard time history wave. The test results show that the maximum stress of porcelain pieces of the bushing is lower than the failure strength, but the flange of the bushing is damaged, which means the device does not meet the seismic design requirements of 3 m/s^2. The test results indicate that the metal flange part is the weak part of the bushing. While paying attention to the seismic performance of the porcelain part, structural connection measures should be taken to improve the stiffness of casing metal parts, so as to improve the seismic performance of the device.
作者
孙宇晗
卢智成
刘振林
林森
王晓宁
钟珉
SUN Yuhan;LU Zhicheng;LIU Zhenlin;LIN Sen;WANG Xiaoning;ZHONG Min(China Electric Power Research Institute, Beijing 100055, China;Department of AC Construction, State Grid Company of China, Beijing 100031, China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2017年第12期4139-4144,共6页
High Voltage Engineering
基金
国家电网公司科技项目(GCB17201500063)~~
关键词
1
100
k
V套管
地震响应
动力特性
加速度
应变
应力
法兰
1 100 kV UHV bushing
seismic response
dynamic characteristics
acceleration
strain
stress
flange
