基于续电流的功率变换器故障诊断方案  

A Study of Fault Diagnosis of Power Converter Based on Stream Current

作　　者：刘勇智[1] 周政[1] 宋金龙[1] 马卫民 王真亮 

机构地区：[1]空军工程大学航空航天工程学院 [2]94354部队 [3]95926部队

出　　处：《空军工程大学学报（自然科学版）》2016年第3期28-32,共5页Journal of Air Force Engineering University(Natural Science Edition)

基　　金：陕西省自然科学基金(S2015YFJM0413)

摘　　要：针对航空开关磁阻起动/发电系统中功率变换器的4种典型电气故障,综合分析上、下续电流并引入数字化提出了一种新的故障诊断方法。在分析功率变换器能量转化过程的基础上,从励磁和续流2个阶段分析了不同故障对上、下续电流的影响,从中提取故障特征,并提出以上、下续流电流差作为故障特征的故障诊断方案。最后搭建了故障仿真模型并进行验证,结果表明,采用该方法提取的故障特征向量,综合了更多的故障量,与单一的相电流检测方法相比,诊断结果清晰明确,可以实现更准确的故障诊断。Aimed at the four typical electrical troubles of power converter in the switched reluctance start- ing/generation system, and on the basis of analyzing upper and lower following current, and introduction of digitizer ,a new method of fault diagnosis is proposed. Converter＇s operational principle and the energy con- vent process are analyzed. The effects of faults on the upper and lower following current are analyzed in ex- citing state and current-following state, then, according to the fault-feature, the scheme of fault diagnosis is put forward based on the difference between upper and lower following current. Finally, a fault diagnose model of switched reluctance starter/generator is built and validated. The result shows that the fault diagnosis scheme is more accurate than that of the fault diagnosis with only phase-current.

关 键 词：开关磁阻起动/发电系统 功率变换器 故障诊断 续电流分析 故障特征向量 

分 类 号：V242[航空宇航科学与技术—飞行器设计] TM352[电气工程—电机]