基于小波包变换和粗糙集的十二相不控整流装置故障诊断  

A Fault Diagnosis Method of 12-Phase Uncontrolled Rectifier Based on Wavelet Packet Transform and Rough Set

作　　者：朱威[1] 阳习党[1] 肖欢[1] ZHU Wei;YANG Xidang;XIAO Huan(National Key Laboratory for Vessel Integrated Power Technology,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室,湖北武汉430033

出　　处：《电器与能效管理技术》2018年第5期7-12,19,共7页Electrical & Energy Management Technology

基　　金：国家优秀青年科学基金项目(51407191)

摘　　要：以三相全桥整流桥并联带均衡电抗器形式的十二相不控整流装置为研究对象,考虑整流二极管单管断开故障情况下,基于小波包变换和粗糙集给出了故障诊断算法。首先通过平移不变小波包变换提取电压波形信号故障特征,然后对小波包能量分布特征空间进行粗糙集训练从而实现故障诊断。仿真结果表明:诊断方法可在不增加信号采样点的情况下实现故障整流二极管的准确定位。According to the 12-phase uncontrolled rectifier in the form of 3-phase rectifier connected to balancing reactor,a fault diagnosis method based on translation-invariant wavelet packet transform and rough set was presented when one diode under open-circuit condition.The fault characteristics space of signal voltage waveform was extracted by the translation-invariant wavelet packet and diagnosis rule was induced by rough set.The simulation result shows that the fault diode can be localized precisely without any more sampling signals.

关 键 词：发电机组 整流装置 均衡电抗器 故障诊断 平移不变小波包变换 粗糙集 

分 类 号：TM46[电气工程—电器]