基于改进矩阵束滤波与检测的异步电动机故障诊断新方法

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摘要针对传统电机故障诊断技术,断条故障边频易被基频淹没,对短时数据分辨率低,复合故障引入平方交叉项等缺点,提出了一种改进矩阵束滤波与检测的异步电机转子故障诊断技术.首先,利用定子电流实测信号构造Hankle矩阵,并对其进行奇异值分解,形成不同的信号子空间.然后对奇异值的部分置零,剔除了基波和噪声的影响,从而准确地估算出故障信息.最后,通过对改进MP算法得到的特征故障频率幅值,定义了转子断条故障严重因子.试验对异步电机转子断条和偏心的故障进行验证,表明该算法可以有效抑制强大的基频和噪声对故障特征频率的影响,且具有远高于快速傅里叶变换(FFT)的高分辨率.

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	王臻
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	张舜钦
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	陈旭
	李惠章

关键词 ：异步电机, 故障诊断, 转子故障, 改进矩阵束, 奇异值, 分辨率

Abstract：In the current fault diagnosis technology in asynchronous motors, the fault characteristic frequency of broken bar is easily drown by the fundamental frequency, and frequency resolution for short time date is low. Besides, mixed fault easily lead into cross interfere due to square calculation. In order to solving the above problems, a novel method for Fault Diagnosis of asynchronous motor based on the improved MP algorithm was proposed. Fist of all, by the singular value decomposition(SVD) of Hankle marxic,which was construed by stator current signal, different signal subspace were easily obtained. secondly, fundamental frequency and noise were eliminated by adjusting part singular value to zero. Then, the parameters of fault characteristic frequency can be accurately estimated. Finally, the definition of fault serious factor was given from the amplitudes of fault characteristic frequency which was received by utilizing the improved MP. The experimental results of broken rotor bars and eccentric fault shows that the method instead of FFT filters the fundamental frequency and noise, which breaks through the limited resolution of traditional based on FFT analysis

Key words： Asynchronous motors fault diagnosis the rotor fault the improved MP the singular value resolution

收稿日期: 2014-09-10 出版日期: 2015-09-14

PACS:

TM307

作者简介: 王臻男,1989年生,硕士生,主要从事电机故障诊断,电力电力系统稳定与控制方面的研究.李承男,1957年生,博士,教授,本文通讯作者,从事电力谐波治理,单周控制理论及应用,神经网络应用等方面的研究.

引用本文:

王臻,李承,张舜钦,王蕾,陈旭,李惠章. 基于改进矩阵束滤波与检测的异步电动机故障诊断新方法[J]. 电工技术学报, 2015, 30(12): 213-219. Wang Zhen,Li Cheng,Zhang Shunqin,Wang Lei,Chen Xu,Li Huizhang. A New Filter and Detection Approach of Fault in Asynchronous Motor Based on Improved Matrix Pencil. Transactions of China Electrotechnical Society, 2015, 30(12): 213-219.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2015/V30/I12/213

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