车用发电机定子匝间短路故障机理分析与特征提取  

Mechanism analysis and feature extraction of inter-turn short circuit fault of vehicle generator stator

作　　者：阳习党[1] 肖欢[1] 张晓伟 钱枫 刘振兴 YANG Xi-dang;XIAO Huan;ZHANG Xiao-wei;QIAN Feng;LIU Zhen-xing(National Key Laboratory of Science and Technology on Vessel Integrated Power System,Naval Univ.of Engineering,Wuhan 430033,China;Unit No.91278,Dalian 116041,China;School of Automobile and Transportation Engineering,Wuhan Univ.of Science and Technology,Wuhan 430065,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,武汉430033 [2]91278部队,辽宁大连116041 [3]武汉科技大学汽车与交通工程学院,武汉430065

出　　处：《海军工程大学学报》2021年第3期8-13,26,共7页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(51407189)。

摘　　要：为解决车用发电机实际运行过程中可能出现难以发现的轻微匝间短路故障,首先建立了发电机正常状态下的数学模型,对发电机出现定子匝间短路故障进行分析;然后,建立了发电机短路故障数学模型并通过park矢量进行坐标系转换,在MATLAB中搭建动力学模型;最后,模拟了发电机系统出现不停程度下的短路故障,利用谐波分析法分析正常和故障状态下的电流、电磁转矩信号,提取故障特征参数。研究结果表明:短路故障造成电流1.0次谐波增长,电磁转矩出现2.0次谐波大幅变化。Minor inter-turn short circuit faults which are difficult to find may occur during the actual operation of automotive generators.In addressing the problem,firstly,the mathematical model of generator in normal state was established,and the stator inter-turn short-circuit fault was analyzed.And then,the mathematical model of generator short-circuit fault was established,and the model was built in MATLAB through the transformation of park vector coordinate system.Finally,the short circuit fault of generator system in non-stop degree was simulated,and the electricity in normal and fault state was analyzed by harmonic analysis method.Current and electromagnetic torque signals were used to extract fault characteristic parameters.The results show that the short circuit fault results in 1.0 harmonic increase of current and 2.0 harmonic large change of electromagnetic torque.

关 键 词：发电机定子 匝间短路故障 PARK矢量 谐波分析 

分 类 号：TM46[电气工程—电器]