基于改进谱分析法的大功率可控整流电路故障在线诊断系统.pdfVIP

第 24 卷 第 10 期 中 国 电 机 工 程 学 报 Vol.24 No.10 Oct. 2004 2004 年 10 月 Proceedings of the CSEE ©2004 Chin.Soc.for Elec.Eng. 0258-8013 (2004) 10-0162-06 TK4 A 470 40 文章编号： 中图分类号： 文献标识码： 学科分类号： ⋅ 基于改进谱分析法的大功率可控整流电路 故障在线诊断系统 李敏远，陈如清 (西安理工大学自动化与信息工程学院，陕西 西安 710048) ON-LINE FAULT DIAGNOSIS SYSTEM FOR HIGH-POWER CONTROLLED RECTIFIER BASED ON IMPROVED FREQUENCY ANALYSIS METHOD LI Min-yuan ， CHEN Ru-qing (School of Automation Information Engineering, Xi’an University of Technology, Xi’an 710048, China) ABSTRACT: This paper studies a fault diagnosis algorithm for 模式向量； DFT 分析 controlled rectifier that can be realized conventionally. Then it 1 引言 classified the faults (within 3 thyristors faults) as 11 kinds or 为了减轻整流装置谐波对电网的影响，提高整 115 fault states according to the aberrance rule. Four especial 流电压直流成分的纯洁度,在城市地铁、轨道交通的 “area” expressions are selected to describe the fault voltage waveforms and the 12- dimension fault pattern vectors are 牵引以及电化学等行业的整流电路往往采用多脉 established based on them. The pattern vectors are changed into 波数整流电路。根据脉动系数定义, 三相桥式全控 new 12- dimension time sequence vectors through the logical 整流电路(6 脉波)为 5.7%, 12 脉波整流电路仅为 processing. A fault-locating algorithm expressed by 3- 1.4%。因此，在大功率可控整流设备中采用多脉波 dimension character vectors is induced after the DFT analysis 整流电路对负载和电网大有好处，并可减小滤波电 of the time sequence vectors. It improves the normal frequency 路元件的容量。在大功率可控整流装