## MATLAB发电机匝间短路故障诊断研究

Title  Study on Fault Diagnosis of  Engine Inter-turn Short Circuit
Abstract
Generator is a key device of electrical system, the fault feature of inter-turn short circuit is relatively not obvious compared with other faults, and it’s easy to be misjudged or delayed which would lead to worsen the fault .The paper focus on the fault feature of generator rotor inter-turn short circuit and stator inter-turn short circuit to determine the fault. We can get the waveform of generator Air-gap magnetic field by search coil method, and apply wavelet analysis to detect inter-turn short circuits in turbo-generator rotor winding, According to wavelet transform and the singularity of signal failures as well as the symmetry of modulus maximum, it is easily to detect shorted turns fault and find the fault position in generator rotor windings. The excitation current would contain high frequency component when generator stator inter-turn short circuit occurs, power spectrum and wavelet energy spectrum can be used to extract the content of each frequency to detect stator shorted turns fault. The concerned theory and example above is verified in MATLAB environment concretely. 源`自<六:维;论-文>网/www.lwfree.cn
Keywords  generator; rotor inter-turn short circuits; stator inter-turn short circuits; Fault Diagnosis; MATLAB
目  录
1  绪论    1
1.1  课题背景    1
1.2  研究现状    1
1.3  本文研究工作    1
2    发电机转子匝间短路故障诊断    2
2.1  发电机转子基本结构及转子匝间短路故障原因    2
2.2  发电机转子匝间短路故障特点    2
2.3  小波变换原理    4
2.4  发电机转子匝间短路故障信号处理    5
2.5  发电机转子匝间短路故障的结果分析    13
3    发电机定子匝间短路故障诊断    14
3.1  发电机定子基本结构及定子匝间短路故障原因    14
3.2  发电机定子匝间短路故障特点    14
3.3  功率谱密度及小波能量谱分析    15
3.4  发电机定子匝间短路故障信号分析方法的应用    18

1  绪论
1.1  课题背景

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