Performance Comparison of VSI Switches Faults Analysis Using STFT and S Transform

Abstract:

Switches fault in power converter has become compelling issues over the years. To reduce cost and maintenance downtime, a good fault detection technique is an essential. In this paper, the performance of STFT and S transform techniques are analysed and compared for voltage source inverter (VSI) switches faults. The signal from phase current is represented in jointly time-frequency representation (TFR) to estimate signal parameters and characteristics. Then, the degree of accuracy for both STFT and S transform are determined by the lowest value of mean absolute percentage error (MAPE). The results demonstrate that S transform gives better accuracy compare to STFT and is suitable for VSI switches faults detection and identification system.

• Periodical: Applied Mechanics and Materials (Volume 785)
• Pages: 210-214
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.785.210
• Online since: August 2015
• Authors: M. Manap*, A.R. Abdullah, N.Z. Saharuddin, N.A. Abidullah, Nur Sumayyah Ahmad, M.H. Jopri
• Keywords: Short Time Fourier Transform, S-Transform, Switches Faults, Voltage Source Inverter

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