Diode Open-Circuit Fault Detection in Rectifier Bridge of the Brushless Synchronous Generator

The most electrical energy in the world is produced by synchronous generators. Therefore, it has always been important to condition monitor the power generators. One of key parts of the brushless synchronous generator is rectifier that is installed on the shaft of the generator which rotates in operational mode. As a result, it is difficult to access the rectifier for condition monitoring. In this paper, a method is proposed to detect the occurred faults on the rectifier using three-phase terminal voltage of the brushless synchronous generator. In order to evaluate the method, the open-circuit fault on one diode and the open-circuit fault on two diodes which leads to opening one phase of the armature winding in exciter generator are detected in an experimental set. In the method, the relative wavelet energy along with some statistical features of the measured signals are extracted. Besides, K Nearest Neighbors (KNN) is used for fault classification.

[1]  Ge Shi,et al.  Generator rotating rectifier fault detection method based on stacked auto-encoder , 2017, 2017 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD).

[2]  Cai Wei,et al.  Fault Diagnosis of Rotating Rectifier Based on Harmonic Features , 2017 .

[3]  Peter E. Hart,et al.  Nearest neighbor pattern classification , 1967, IEEE Trans. Inf. Theory.

[4]  Ge Shi,et al.  Fault detection of aircraft generator rotating rectifier based on SAE and SVDD method , 2017, 2017 Prognostics and System Health Management Conference (PHM-Harbin).

[5]  Chao Zhang,et al.  Fault Signal Analysis for Aircraft Generator Rectifier , 2014 .

[6]  Om P. Malik,et al.  A MICROPROCESSOR-BASED FAULT MONITOR FOR ROTATING RECTIFIERS OF BRUSHLESS AC EXCITERS USING A PATTERN-RECOGNITION APPROACH , 1996 .

[7]  Abdelkader Chaari,et al.  Brushless Three-Phase Synchronous Generator Under Rotating Diode Failure Conditions , 2014, IEEE Transactions on Energy Conversion.

[8]  Liuchen Chang,et al.  Open-circuit fault diagnosis in 3-phase uncontrolled rectifiers , 2012, 2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG).

[9]  Chang Xu,et al.  A neural network based approach for the detection of faults in the brushless excitation of a synchronous motor , 2009, 2009 IEEE International Conference on Electro/Information Technology.

[10]  Noureddine Takorabet,et al.  A novel diode open circuit fault detection in three phase rectifier based on k-means method , 2018, 2018 IEEE International Conference on Industrial Technology (ICIT).

[11]  M. Ozdemir,et al.  Comparison of statistical methods and wavelet energy coefficients for determining two common PQ disturbances: Sag and swell , 2009, 2009 International Conference on Electrical and Electronics Engineering - ELECO 2009.

[12]  Gautam Biswas,et al.  Aircraft Power Generators: Hybrid Modeling and Simulation for Fault Detection , 2012, IEEE Transactions on Aerospace and Electronic Systems.

[13]  Abolfazl Vahedi,et al.  Rotary diode failure detection in brushless exciter system of power plant synchronous generator , 2016, 2016 6th Conference on Thermal Power Plants (CTPP).

[14]  Mark J. Shensa,et al.  The discrete wavelet transform: wedding the a trous and Mallat algorithms , 1992, IEEE Trans. Signal Process..

[15]  Abdelkader Chaari,et al.  Detection of brushless exciter rotating diodes failures by spectral analysis of main output voltage , 2013, 2013 International Conference on Electrical Engineering and Software Applications.