基于有限元的GIS母线不对中机械振动特性研究  

Study on Mechanical Vibration Characteristics of GIS Bus Misalignment Based on FEM

作　　者：卞超 张正东 赵科 树婷 BIAN Chao;ZHANG Zhengdong;ZHAO Ke;SHU Ting(State Grid Jiangsu Electric Power Co.,Ltd.,Maintenance Branch,Nanjing 211100,China;State Grid Jiangsu Electric Power Co.,Ltd.,Electric Power Research Institute,Nanjing 211100,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]国网江苏省电力有限公司检修分公司,南京211100 [2]国网江苏省电力有限公司电力科学研究院,南京211100 [3]西安交通大学电气工程学院,西安710049

出　　处：《高压电器》2020年第6期72-79,共8页High Voltage Apparatus

摘　　要：GIS母线较长或安装错位时,会出现母线不对中现象。这种机械故障会导致GIS导杆受力不平衡,引起机械振动。文中通过有限元仿真的方法,建立单相GIS母线模型,并施加正弦载荷模拟不对中故障激励,探究其振动特性。采用有限元软件对母线模型进行计算模态分析,得到结构的固有频率和振型。通过分析母线外壳X、Y、Z方向振动加速度以及总加速度时域图和频谱图,获得各个方向上振动的频谱特征,总结自由状态下和约束条件下母线外壳的传播特性。When the GIS bus is long or installed incorrectly,the bus will not be centered.This mechanical failure will cause the GIS guide rod to bear unbalanced force and cause mechanical vibration.In this paper,a single⁃phase GIS bus model is established by finite element simulation method,and a sinusoidal load is applied to simulate mis⁃alignment fault excitation and explore its vibration characteristics.FEM software is used to calculate the model analy⁃sis of the bus model,and the natural frequency and mode shape of the structure are obtained.By analyzing the vibra⁃tion accelerations of the busbar shells in the X,Y,and Z directions,as well as the time⁃domain plots and spectro⁃grams of the total acceleration,the spectral characteristics of the vibrations in all directions are obtained,and the propagation characteristics of the busbar shells under free conditions and constraints are summarized.

关 键 词：GIS 机械振动 有限元仿真 母线不对中 

分 类 号：TM595[电气工程—电器]