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Waveform Envelope Method to Detect Point on Wave initiation of Voltage Sag


Author(s):

N.N.Jangle , K.K.Wagh Institution of Engineering Education & Research, Nashik; A.M.Jain, K.K.Wagh Institution of Engineering Education & Research, Nashik; B.E.Kushare, K.K.Wagh Institution of Engineering Education & Research, Nashik

Keywords:

Power Quality, Point on Wave Initiation, Voltage Sag, Discrete Wavelet Transform, Waveform Envelope

Abstract:

This paper presents an algorithm for detection and characterization of voltage sag on transmission and distribution lines using Waveform envelope Method. Voltage sag magnitude and duration are two commonly used characteristics of voltage sag. These two characteristics can be obtained by using RMS voltage method. But the other characteristics of voltage sag like point on wave and phase angle jump are not clear from RMS voltage calculation as it uses one or half wave window. In this paper RMS voltage method and discrete wavelet transform method is used to calculate voltage sag magnitude of voltage sag disturbance from fundamental 50 Hz frequency. Point on wave initiation is a characteristic that can not be identified from RMS waveform. So, to detect Point on wave initiation sinusoidal voltage equation is used with discrete wavelet transform. As alternating waveform is not always ideal but it is disturbed due to different load conditions on system, Waveform envelope algorithm is simulated to detect point on wave initiation in MATALAB simulink and the results are presented at various magnitudes and Point on Wave initiations.


Other Details:

Manuscript Id :IJSTEV2I7068
Published in :Volume : 2, Issue : 7
Publication Date: 01/02/2016
Page(s): 120-124
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