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Up to now, detection of rotor faults in inverter-fed induction motors has received very little attention. This fault is difficult to be detected, since the fault-related components are too close to the fundamental (the inverter usually operates at low slip). Moreover, classic techniques cannot be applied since steady states are not common. The causes of this type of fault are analyzed in the paper,...
This paper presents a new method for automatic classification of power quality events, developed based on S-transform. This transform provides high resolution time-frequency representations used to calculate power quality indices. Supplementary information about detected events (the magnitude, duration and frequency spectrum of the identified disturbances) are extracted in order to characterize the...
With the wide application of sensitive power electronic devices in industry, the power quality (PQ) disturbance problems become more concerned. The S-transform is a time-frequency localization technique that bridges the gap between the short-time Fourier transform and wavelet transform. A new PQ disturbances identification method based on S-transform time-frequency analysis and fuzzy expert system...
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