NDLI: Improved phase-locked loop for distributed power generation systems

Content Provider	IEEE Xplore Digital Library
Author	Adzic, E. Adzic, M. Tomic, J. Katic, V.
Copyright Year	2011
Description	Author affiliation: Faculty of Technical Sciences, Novi Sad, Serbia (Adzic, E.; Tomic, J.; Katic, V.) \|\| College of Applied Sciences, Subotica, Serbia (Adzic, M.)
Abstract	Distributed power generation systems (DPGS) based on renewable energy sources need accurate grid phase angle information in order to achieve different control algorithms usual for this application. Phase-locked loop (PLL) is the most modern and most common method for determination of the phase angle and frequency of the grid voltage. However, there are still serious limitations of reported PLL algorithms in real grid voltage conditions, such as unbalanced and distorted distribution grid. This paper proposes improved PLL which gives excellent and almost perfect grid voltage phase angle and frequency in unbalanced and distorted grid. This is achieved by a cascade of finite impulse response filters which eliminates characteristic harmonic components and extracts only fundamental harmonic signal. In that way, proposed PLL allows setting of higher bandwidth frequency of the PLL filter and much faster response which is especially important during grid voltage sags and frequency variations. Performance has been evaluated in details through simulation in Matlab/Simulink.
Starting Page	323
Ending Page	328
File Size	500164
Page Count	6
File Format	PDF
ISBN	9781457719752
e-ISBN	9781457719745
DOI	10.1109/SISY.2011.6034345
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-08
Publisher Place	Serbia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Unbalanced and distorted grid Simulation Power quality Phase-locked loop Harmonic analysis Finite impulse response filter Frequency estimation Distributed power generation systems Phase locked loops Voltage control Power harmonic filters
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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