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-  2018 

Application of digital signal processing tools for the detection of voltage sag/swell

DOI: 10.1177/0020720918754830

Keywords: Digital signal processing,detection of voltage sag/swell,Kalman filter,wavelet transform

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Abstract:

Electrical engineering education textbooks usually restrict the linking between theory and practical work in power quality problems, such as voltage sag/swell. This paper presents a mathematic model of the power signal and digital signal processing tools, such as Kalman filter and wavelet transform, for analysis and detection of voltage sag/swell. Aiming at education and teaching in electrical power quality courses, M files for Kalman filter and wavelet transform in the Matlab program are introduced to record and track the waveform distortion with harmonics, voltage sag or a pulse, which allow students to simulate the effect of voltage sag and to see immediately the advantages and limitations of these two techniques for power quality problems

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