基于振动信号的油浸式铁心电抗器典型缺陷诊断方法研究  

Research on Typical Defect Diagnosis Method of Oil⁃immersed Iron Core Reactor Based on Vibration Signal

作　　者：孟令明 高树国 张玉焜 柳树青 汲胜昌[2] 田源 张宁 MENG Lingming;GAO Shuguo;ZHANG Yukun;LIU Shuqing;JI Shengchang;TIAN Yuan;ZHANG Ning(State Grid Hebei Electric Power Co.,Ltd.Institute of Electric Power Science,Shijiazhuang 050021,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;State Grid Hebei Electric Power Co.,Ltd.Overhaul Branch Company,Shijiazhuang 050021,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 [3]国网河北省电力有限公司检修分公司,石家庄050021

出　　处：《高压电器》2025年第4期230-238,共9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：油浸式铁心电抗器正常运行期间其振动由绕组受力、铁心磁致伸缩效应以及铁心饼间的麦克斯韦力导致。通过构建电抗器磁—固耦合三维模型,对电抗器在3种载荷作用下的轴向及径向振动响应分布进行分析。在此基础上搭建电抗器振动试验平台获取了电抗器箱体振动信号,通过调整铁心轴向压紧力,对箱体振动信号进行采集,通过提取各机械状态下的振动频谱特征可知,随着电抗器铁心轴向压紧力降低,箱体振动信号频谱发生变化,采用3种贝叶斯优化的网络分类器模型,对不同压紧力下的机械状态进行识别,准确率分别达到了94.5%、94.2%与95.0%,进一步验证了频谱特征结合优化算法对电抗器铁心松动判断的高效性。During the normal operation of the oil-immersed iron core reactor,its vibration is caused by the winding stressing,the magnetostrictive effect of the iron core and the Maxwell force between the iron cores.The axial and radi-al vibration response distributions of the reactor under three loads are analyzed by constructing a three-dimensional model of the magnetic-solid coupling of the reactor.On this basis,a reactor vibration test platform is set up to obtain the vibration signal of the reactor housing.The vibration signal of the housing is collected by adjusting the axial com-pression force of the iron core.It is known by extracting the vibration spectrum characteristic under various mechani-cal states that with the reduction of the axial compression force of the reactor core,the vibration signal spectrum of the housing is changed.Three kinds of Bayesian optimized network classifier models are adopted to identify the me-chanical state under different compression forces,and the accuracy rate has reached 94.5%,94.2%and 95.0%respec-tively,and the high efficiency of the spectrum feature in combination with the optimization algorithm for the looseness judgement of the reactor core is verified further.

关 键 词：铁心电抗器 磁—固耦合 振动响应 频谱特征 

分 类 号：TM47[电气工程—电器]