DocumentCode :
54131
Title :
An Adaptive Prefiltering Method to Improve the Speed/Accuracy Tradeoff of Voltage Sequence Detection Methods Under Adverse Grid Conditions
Author :
Matas, Jose ; Castilla, Miguel ; Miret, Jaume ; Garcia de Vicuna, L. ; Guzman, Ramon
Author_Institution :
Dept. of Electron. Eng., Tech. Univ. of Catalonia (UPC), Vilanova i la Geltru, Spain
Volume :
61
Issue :
5
fYear :
2014
fDate :
May-14
Firstpage :
2139
Lastpage :
2151
Abstract :
This paper deals with the improvement of the transient response and harmonic, subharmonic, and dc-offset voltage rejection capability of a grid voltage sequence detection scheme based on a second-order generalized integrator (SOGI). To perform that, the SOGI structure is first analyzed in deep, emphasizing both its tradeoff limits between settling time and harmonic attenuation and the sensitivity to grid subharmonics and dc-offset voltage. Then, a study of the effect of grid voltage harmonics and subharmonics in SOGI and in the SOGI-FLL and MSOGI-FLL structures is introduced. Hence, to overcome these problems, a new structure based on the use of the SOGI filter as prefilter for the previous structures is proposed to achieve a faster time response and higher harmonic rejection. This structure is used in a sequence detection scheme for the detection of the grid voltage components in the αβ-frame and it is applied in a three-phase PV system. Experimental and comparative results are shown to validate this proposal.
Keywords :
adaptive filters; power grids; power system harmonics; transient response; αβ-frame; MSOGI-FLL structures; adaptive prefiltering method; adverse grid conditions; dc-offset voltage rejection capability; grid subharmonics; grid voltage sequence detection scheme; harmonic attenuation; second-order generalized integrator; speed-accuracy tradeoff; three-phase PV system; transient response; voltage sequence detection methods; Frequency locked loops; Harmonic analysis; Inverters; Power harmonic filters; Power quality; Voltage control; Voltage fluctuations; Distributed generation; generalized integrators; grid offset voltage rejection; grid voltage sequence detection; power quality; subharmonic rejection; voltage sags;
fLanguage :
English
Journal_Title :
Industrial Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0278-0046
Type :
jour
DOI :
10.1109/TIE.2013.2274414
Filename :
6566021
Link To Document :
بازگشت