H桥逆变器电解电容参数性故障特征提取  

Fault feature extraction of electrolysis capacitor parametric for H-brige inverter

作　　者：王新[1] 赵文昌[1] 

机构地区：[1]河南理工大学电气工程与自动化学院,焦作454000

出　　处：《电子测量技术》2016年第6期159-162,共4页Electronic Measurement Technology

基　　金：国家自然科学基金(61403129);河南省科技攻关(142102210048)资助项目

摘　　要：研究H桥逆变器电解电容参数性故障诊断的特征提取问题。传统基波等效分析法是利用基波来寻求电容老化的特征规律,在实际情况中该方法误差较大,可靠性不高。针对这一问题,提出采用小波包频带能量法对故障信号进行特征提取,该方法能够精确提取信号的频带能量变化信息。通过建立H桥逆变器仿真模型,模拟电容不同老化程度的故障,用小波包频带能量法提取出电容正常和不同老化程度下的频带能量,构造特征向量,以寻求H桥逆变器电容老化时的特征变化规律。仿真结果表明,该方法能够准确提取H桥逆变器的电解电容老化故障特征。The feature extraction of H-bridge inverter electrolytic capacitor parameters fault diagnosis is researched . The capacitor aging characteristics is analyzed by the traditional fundamental equivalent analysis based on the fundamental harmonic .In the actual situation ,this method has large error and its reliability is poor .In order to solve the above problem ,this paper puts forward to use the wavelet packet frequency band energy method to extract the fault feature .This method can accurately extract the signal band energy changed information . Through building the simulation model of H-bridge inverter to simulate the different capacitance aging fault ,the band energy can be extracted under the capacitor normal and varying degrees of aging based on the wavelet packet frequency band energy method , feature vectors are constructed ,and H-bridge inverter electrolytic capacitor characteristic change rules are sought as the capacitor aging .Simulation results show that this method can accurately extract the H-bridge inverter electrolytic capacitor aging fault feature .

关 键 词：H桥逆变器 电解电容老化 基波等效分析 小波包频带能量 

分 类 号：TM64[电气工程—电力系统及自动化]