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Voltage sag waveform features extraction using matlab

Mohd Noh , Faridah Hanim (2008) Voltage sag waveform features extraction using matlab. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

In this project a software tool to extract characteristic parameters from a voltage sag waveform has been successfully developed and tested. The real recorded voltage sag waveform was acquired from IEEE Working Group PI 159.2 Power Quality Event Characterisation webpage. The development of this software tool was done using Matlab environment. Theories and methods on voltage sag characterization was studied and analyzed. The characteristic parameters extraction is done on two conditions of sag, which are voltage sag in single phase condition and voltage in for three phase condition. Two signal processing methods have been applied in order to extract the characteristic of voltage sag in these two conditions. The applied methods are the rms sequence and Discrete Fourier Transform. The extracted parameters or indices of voltage sag in this project are the sag's magnitude, duration, phase angle jump, energy, and severity, type of sag, PN factor and the characteristic voltage. These parameters are the indices which characterize the voltage sag in single phase and three phase condition. The values of these parameters are displayed in the Graphical User Interface of the software tool that has been developed. These values has been compared with the results obtain from the manual calculation and from the simulation results on the Matlab rms and Discrete Fourier block set.

Item Type: Thesis (Masters)
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Depositing User: Ms Aryanti Ahmad
Date Deposited: 07 Apr 2011 00:38
Last Modified: 29 Apr 2011 06:42
URI: http://eprints.uthm.edu.my/id/eprint/835
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