Interpolated-DFT-Based Fast and Accurate Amplitude and Phase Estimation for the Control of Power

Borkowski, J.; Kania, D.

doi:10.1515/mms-2016-0013

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Tytuł artykułu

Interpolated-DFT-Based Fast and Accurate Amplitude and Phase Estimation for the Control of Power

Autorzy

Borkowski J. , Kania D.

Treść / Zawartość

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DOI

10.1515/mms-2016-0013

Warianty tytułu

Języki publikacji

Abstrakty

Quality of energy produced in renewable energy systems has to be at the high level specified by respective standards and directives. One of the most important factors affecting quality is the estimation accuracy of grid signal parameters. This paper presents a method of a very fast and accurate amplitude and phase grid signal estimation using the Fast Fourier Transform procedure and maximum decay side-lobes windows. The most important features of the method are elimination of the impact associated with the conjugate’s component on the results and its straightforward implementation. Moreover, the measurement time is very short ‒ even far less than one period of the grid signal. The influence of harmonics on the results is reduced by using a bandpass pre-filter. Even using a 40 dB FIR pre-filter for the grid signal with THD ≈ 38%, SNR ≈ 53 dB and a 20‒30% slow decay exponential drift the maximum estimation errors in a real-time DSP system for 512 samples are approximately 1% for the amplitude and approximately 8.5・10^‒2 rad for the phase, respectively. The errors are smaller by several orders of magnitude with using more accurate pre-filters.

Słowa kluczowe

control of power grid signal amplitude and phase estimation renewable energy interpolated DFT maximum decay side-lobes windows

Wydawca

Komitet Metrologii i Aparatury Naukowej PAN

Czasopismo

Metrology and Measurement Systems

Rocznik

2016

Tom

Vol. 23, nr 1

Strony

13--26

Opis fizyczny

Bibliogr. 32 poz., rys., tab., wykr., wzory

Twórcy

autor

Borkowski J.

Jozef.Borkowski@pwr.edu.pl

Wrocław University of Technology, Chair of Electronic and Photonic Metrology, B. Prusa 53/55, 50-317 Wrocław, Poland

autor

Kania D.

Dariusz.Kania@pwr.edu.pl

Wrocław University of Technology, Chair of Electronic and Photonic Metrology, B. Prusa 53/55, 50-317 Wrocław, Poland

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.

Typ dokumentu

Bibliografia

Identyfikator YADDA

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