高压并联电抗器振动疲劳分析与缺陷诊断研究  

Research on Vibration Fatigue Analysis and Defect Diagnosis of High Voltage Shunt Reactor

作　　者：高树国 孟令明 张玉焜 汲胜昌[2] 丘子诚 赵军 邢超 GAO Shuguo;MENG Lingming;ZHANG Yukun;JI Shengchang;QIU Zicheng;ZHAO Jun;XING Chao(State Grid Hebei Electric Power Research Institute,Shijiazhuang 050021,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]国网河北省电力有限公司电力科学研究院,石家庄050021 [2]西安交通大学电力设备与电气绝缘国家重点实验室,西安710049

出　　处：《高压电器》2025年第1期215-222,共8页High Voltage Apparatus

基　　金：国家电网有限公司总部科技项目资助(5200⁃201913054A⁃0⁃0⁃00)。

摘　　要：高压并联电抗器正常运行期间,其箱体振动导致固体结构件受到交变的机械应力。结构材料的机械强度在长期应力作用下日益降低,从而导致电抗器发生严重缺陷。文中结合多物理场有限元仿真模型和电抗器振动实验,首先获取了电抗器三维模型在运行期间的应力分布,以及容易发生机械疲劳的部位。在此基础上,通过对一台500 kV铁心电抗器的相应部位模拟机械缺陷,对比了不同机械状态下箱壁振动特征,并采用马尔科夫转移场与卷积神经网络对不同机械状态进行识别,各信号通道均达到了较高的识别准确率,为电抗器机械缺陷诊断提供了新方法。During normal operation of high⁃voltage shunt reactor,the vibration of its housing causes the solid struc⁃ture to be subjected to alternating mechanical stress.The mechanical strength of structural materials is gradually re⁃duced under long⁃term stress,thus resulting in serious defects in the reactor.In this paper,combined with the multi⁃physics finite element simulation model and the reactor vibration experiment,the stress distribution of the three⁃di⁃mensional model of the reactor during operation and the parts prone to mechanical fatigue are obtained firstly.On this basis,the vibration characteristics of the housing wall under different mechanical states are compared by simu⁃lating the mechanical defects of the corresponding parts of a 500 kV iron core reactor and the Markov transfer field and convolutional neural network are used to identify different mechanical states.Each signal channel has achieved a high recognition accuracy,which provides a new method for the diagnosis of mechanical defects of reactor.

关 键 词：高压并联电抗器 机械应力 振动特征 缺陷诊断 

分 类 号：TM472[电气工程—电器]