重庆理工大学学报（自然科学版）2017，Vol.31Issue(6)：171-178,8.DOI:10.3969/j.issn.1674-8425(z).2017.06.026
多桥并联励磁系统功率单元故障诊断方法
Fault Diagnosis Scheme Based on Wavelet Analysis of Power Unit in Excitation System
龚俊名 1刘伟2
作者信息
- 1. 重庆理工大学电气与电子工程学院,重庆400054
- 2. 重庆市能源互联网工程技术研究中心,重庆400054
- 折叠
摘要
Abstract
This article presents a fault diagnosis method based on wavelet analysis in case of locating the fault thyristors in multi-bridge parallel power unit of excitation system.Summarizing three factors that influence the apparent time of singular point:fault time,location of fault thyristors,α (the firing angle) through the simulation of power unit.The usage of wavelet energy entropy,wavelet modulus maxima and the truth table of fault categories can be applied to remove the effect of disturbing factor and unifies all the fault situations with progressive fault diagnosis strategy that reduce the quantity of current sensors,lower the equipment cost and improve the system reliability.According to simulation and experiment,an improvement method was proposed to test the reliability of this method.关键词
多桥并联励磁系统/功率单元/故障诊断/小波分析/小波能谱熵/模极大值Key words
power unit of excitation system/power unit/fault diagnosis/wavelet analysis/wavelet energy entropy/wavelet modulus maximum分类
动力与电气工程引用本文复制引用
龚俊名,刘伟..多桥并联励磁系统功率单元故障诊断方法[J].重庆理工大学学报（自然科学版）,2017,31(6):171-178,8.
