NDLI: Phase locked loop based on an observer for grid synchronization

Content Provider	IEEE Xplore Digital Library
Author	Yongsoon Park Seung-Ki Sul Woo-Chull Kim Hyun-Young Lee
Copyright Year	2013
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Seoul Nat. Univ., Seoul, South Korea (Yongsoon Park; Seung-Ki Sul) \|\| PLASPO Co., Ltd., Goyang, South Korea (Hyun-Young Lee) \|\| LG Uplus Corp., Seoul, South Korea (Woo-Chull Kim)
Abstract	Grid synchronization technique is essential for grid-connected power converters. Phase locked loop (PLL) has been exploited as an implementation technique. However, additional efforts are required for PLL to deal with severely distorted grid voltages. In this paper, an observer is proposed to enhance the performance of PLL. A state equation is formulated to extract positive-sequence voltage from the distorted grid voltage and is utilized to construct the observer. Guidelines are suggested to set the gains of the observer along with its internal transfer functions. The PLL combined with the proposed observer has been tested in simulations and experiments in contrast to dual second order generalized integrator frequency locked loop (DSOGI-FLL). The results have validated that the proposed method reveals better phase-tracking performance for grid synchronization.
Sponsorship	IEEE Power Electron. Soc.
Starting Page	308
Ending Page	315
File Size	2124147
Page Count	8
File Format	PDF
ISBN	9781467343541
ISSN	10482334
e-ISBN	9781467343558
e-ISBN	9781467343534
DOI	10.1109/APEC.2013.6520226
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-03-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Observers Phase locked loops Equations Transfer functions Damping Synchronization Harmonic analysis
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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