NDLI: A new fuzzy-wavelet based representative quality power factor for stationary and nonstationary power quality disturbances

Content Provider	IEEE Xplore Digital Library
Author	Morsi, W.G. El-Hawary, M.E.
Copyright Year	2009
Abstract	Power factor is an important index for evaluating the transmission efficiency in electric power system (EPS) along with the quality of the transmitted power. Three different power factors currently exist in the standards to satisfy those requirements namely; displacement, transmission efficiency and oscillation power factors. Currently those three power factors are defined according to the Fast Fourier Transform (FFT) which produces inaccurate results in case of nonstationary (sinusoidal or nonsinusoidal) waveforms. Therefore in this paper, the three power factors are redefined in the time-frequency domain using the Wavelet packet transform (WPT) that proves to be capable of accurately measuring and representing EPS waveforms especially under nonstationary disturbances. Then a new Fuzzy-Wavelet based representative quality power factor module is developed to amalgamate the three redefined power factors into one single index called Fuzzy-Wavelet Representative Quality Power Factor (FWRQPF). The advantage of the new index is to evaluate quantitatively, qualitatively and accurately the power transmission efficiency while benefiting from the advantages of fuzzy systems to be simple, easy to be used with no need for an expert since it contains its own knowledge base. The new index can be indicative for billing purposes, evaluating the PQ in deregulated markets, help deciding suitable PQ mitigation and power factor correction techniques for power factor improvements under stationary or nonstationary operating conditions.
Starting Page	1
Ending Page	7
File Size	1070386
Page Count	7
File Format	PDF
ISBN	9781424442416
ISSN	19449925
DOI	10.1109/PES.2009.5275159
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-07-26
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Reactive power Power quality Fast Fourier transforms Time frequency analysis Wavelet packets Wavelet domain Wavelet transforms Power measurement Power transmission Fuzzy systems wavelet transform Fuzzy Systems Harmonics Nonstationary Power Factor Power Quality
Content Type	Text
Resource Type	Article

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