Enhancement of FFT-based algorithm for voltage flicker measurement

Author

Chen, Ming-Tang ; Hsiao, Sheng-Jen ; Lu, Chen-Wen

Author_Institution

Dept. of Electr. Eng., Nat. Kaohsiung Univ. of Appl. Sci., Kaohsiung

fYear

2008

fDate

Sept. 28 2008-Oct. 1 2008

Firstpage

1

Lastpage

5

Abstract

Digital algorithms have been widely used for the measurement of voltage flicker, and the fast Fourier transform (FFT) is the most popular tool to calculate individual and equivalent voltage flicker components. In this paper the effects of system frequency deviation on the performance of FFT-based algorithms are analyzed, and an enhanced indirect demodulation algorithm is proposed to mitigate the effect. The simulation results illustrate that the proposed method can effectively improve the error caused by the system frequency deviation; besides, field test results also validate the feasibility of the virtual instrument used to implement the algorithm.

Keywords

fast Fourier transforms; power supply quality; voltage measurement; FFT-based algorithm enhancement; digital algorithms; enhanced indirect demodulation algorithm; fast Fourier transform; power quality; system frequency deviation; voltage flicker measurement; Demodulation; Fast Fourier transforms; Flowcharts; Frequency estimation; Frequency measurement; Instruments; Power measurement; Sampling methods; Voltage fluctuations; Voltage measurement; Fast Fourier Transform; Power Quality; Virtual Instrumentation System; Voltage Flicker;

fLanguage

English

Publisher

ieee

Conference_Titel

Harmonics and Quality of Power, 2008. ICHQP 2008. 13th International Conference on

Conference_Location

Wollongong, NSW

Print_ISBN

978-1-4244-1771-1

Electronic_ISBN

978-1-4244-1770-4

Type

conf

DOI

10.1109/ICHQP.2008.4668809

Filename

4668809