Vibration Analysis of DFIG Stator Winding Inter-turn Short Circuit Fault

2018 International Conference on Information Systems and Computer Aided Education (ICISCAE) Pub Date : 2018-07-01 DOI:10.1109/ICISCAE.2018.8666886

Peng Qin, Zhiyan Zhang, Yusheng Sun, Hua Liu, H. Ren

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引用次数: 4

Abstract

In order to study the Doubly-Fed Induction Generator (DFIG) stator winding inter-turn short circuit fault, firstly, air-gap characteristic of magnetic field after short circuit of stator winding under inter-turn is analyzed. Secondly, the formula of the air-gap flux density, air-gap permeance, air-gap magnetic field energy and the pulsating electromagnetic force acting on the stator is obtained. Finally, the vibration characteristics of the generator stator is got. For getting the signal of stator vibration, we take stator winding inter-turn short circuit experiment by using the DFIG of dynamic emulation laboratory. By analyzing the stator vibration with Hilbert-Huang Transform (HHT) method and comparing the signal of the Hilbert spectrum, the frequency component amplitude variation with time is achieved. Comparing Marginal spectrum among different signals, the fault feature parameters of stator winding inter-turn short circuit are acquired. At last, the experimental results are in good agreement with the theoretical results.

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DFIG定子绕组匝间短路故障的振动分析

为了研究双馈异步发电机(DFIG)定子绕组匝间短路故障，首先对定子绕组匝间短路后的磁场气隙特性进行了分析。其次，得到了气隙磁通密度、气隙磁导率、气隙磁场能量和作用在定子上的脉动电磁力的计算公式;最后，得到了发电机定子的振动特性。为了获取定子振动信号，利用动态仿真实验室的DFIG进行了定子绕组匝间短路实验。利用希尔伯特-黄变换(Hilbert- huang Transform, HHT)方法对定子振动进行分析，并对信号的希尔伯特谱进行比较，得到了定子振动的频率分量幅值随时间的变化规律。通过比较不同信号的边际谱，得到定子绕组匝间短路的故障特征参数。最后，实验结果与理论结果吻合较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2018 International Conference on Information Systems and Computer Aided Education (ICISCAE)

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