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The term Power Quality (PQ) has gained lots of interest in the changed power distribution system scenario. The increased use of power electronic switches based equipment, nonlinear loads and the changed power system regulations has made PQ an important issue. The non-stationary PQ disturbances such as; voltage sag, swell, momentary interruptions, transients, along with the stationary harmonics have...
The increased use of power electronics based equipment, nonlinear loads and the changing power system regulations has made power quality (PQ) an important issue. The changed load condition has increased the proliferation of non-stationary PQ disturbances such as; voltage sag, swell, momentary interruptions, transients, along with the stationary harmonics. The conventionally used Fourier transform...
Changing power system regulations and increased use of nonlinear devices have made power quality (PQ) a highly important issue. The short duration transient disturbances, along with the stationary harmonics have become very common due to the increased use of power electronic switches. These transients are defined in terms of their spectral content, duration and magnitude by IEEE 1159-2009 standards...
The increased use of non-linear loads, power electronic switches and changing regulations in today's power distribution system has made power quality (PQ) an important concern. The various types of PQ disturbances are defined in IEEE standards 1159-2009 in terms of their frequency, magnitude and duration. The broadness of these definitions further makes it difficult to investigate these disturbances...
The changing power system regulations and increased use of power electronics based equipment, has made power quality (PQ) a highly important issue. The conventional Fourier transform based PQ indices work well with stationary disturbances, but fail to indicate or quantify the PQ issues related to non-stationary disturbances. In order to consider the effects of PQ disturbances, that occur for a short...
Digital signal processing techniques based power quality analysis has attracted the attention of number of researchers. There are different time frequency techniques like short time Fourier transform (STFT), Continuous Wavelet transform (CWT) and S-transform used for the analysis of power quality disturbances. S-transform is a modified version of CWT with a phase correction. It offers a distinct advantage...
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