NDLI: A new family of measurement technique for tracking voltage phasor, local system frequency, harmonics and DC offset

Content Provider	IEEE Xplore Digital Library
Author	Jun-Zhe Yang Chih-Wen Liu
Copyright Year	2000
Description	Author affiliation: Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan (Jun-Zhe Yang)
Abstract	A series of precise digital algorithms based on discrete Fourier transforms (DFT) to calculate the frequency and phasor in real-time are proposed. These algorithms, we called the smart discrete Fourier transforms (SDFT) family, succeeded in overcoming several problems of DFT, which include frequency deviation, harmonics and DC offset. Moreover, if using smoothing windows to filter noise, the SDFT family is not affected by phase shift and amplitude decay. Factional cycle computing is allowed. Also, the advantages of DFT can still be reserved in SDFT family. These make the SDFT family more accurate than conventional DFT. Besides, SDFT family is very easy to implement, so it is very suitable for use in power systems. We provide the general form of SDFT family and simulation results compared with conventional DFT method to verify the claimed benefits of SDFT family.
Starting Page	1327
Ending Page	1332
File Size	502789
Page Count	6
File Format	PDF
ISBN	0780364201
DOI	10.1109/PESS.2000.868716
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-07-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Measurement techniques Voltage Discrete Fourier transforms Frequency Power system simulation Power system harmonics Power harmonic filters Smoothing methods Noise level Phase noise
Content Type	Text
Resource Type	Article

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