摘要
铁心松动是高压并联电抗器长期振动效应下的主要机械故障之一,利用单点振动信号分析法对其进行缺陷诊断存在测点选择困难、数据不具备典型性等缺点,而利用振动传感阵列可有效避免以上问题。介绍了基于质量‑弹簧模型的并联电抗器铁心振动机理,通过高压并联电抗器振动测试平台,确立了高压并联电抗器油箱振动形态测试方案,得到各个频率分量下高压并联电抗器油箱表面的振动形态,分析了电压和铁心松动对高压并联电抗器油箱表面基频振动形态的影响。借鉴图像形态学中纹理特征的提取方法提出了一种基于振动强度共生矩阵的特征提取算法,以铁心处于紧固状态和不同松动状态下的10 kV并联电抗器模型为算例,验证了所提算法的有效性。
Core loosening is one of the main mechanical faults of high voltage shunt reactors under long-term vibration effect.The defect diagnosis by single-point vibration signal analysis method has some drawbacks such as difficult selection of test points and non-typical data.The above problems can be effectively avoided by using vibration sensor array.This paper introduces the vibration mechanism of the core of shunt reactor based on mass-spring model.With the vibration test platform of high voltage shunt reactor,a test scheme of vibration morphology of high voltage shunt reactor tank is established,and the vibration morphology of high voltage shunt reactor tank surface under each frequency component is obtained.The influence of the voltage and core loosening on the vibration morphology of high voltage shunt reactor tank surface is analyzed.A method based on texture feature extraction in image morphology is presented.The feature extraction algorithm of the vibration intensity symbiosis matrix is applied to a 10 kV shunt reactor model with a fixed core and different loosening states to verify the effectiveness of the proposed algorithm.
作者
高树国
孟令明
张玉焜
张凡
汲胜昌
田源
GAO Shu-guo;MENG Ling-ming;ZHANG Yu-kun;ZHANG Fan;JI Sheng-chang;TIAN Yuan(Electric Power Research Institute of State Grid Hebei Electric Power Co.,Ltd.,Shijiazhuang 050021,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《振动工程学报》
EI
CSCD
北大核心
2023年第3期875-884,共10页
Journal of Vibration Engineering
基金
国家电网有限公司总部科技项目(5200-201913054A-0-0-00)。
关键词
故障诊断
高压并联电抗器
振动传感阵列
振动形态
铁心松动
fault diagnosis
high voltage shunt reactor
vibration sensor array
vibration morphology
core looseness
