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Sinusoidal current‐tracking control for utility interactive inverter with an LCL filter
Author(s) -
Kato Toshiji,
Inoue Kaoru,
Donomoto Yoshihisa
Publication year - 2013
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.22339
Subject(s) - control theory (sociology) , inverter , transfer function , waveform , harmonic , filter (signal processing) , digital control , repetitive control , computer science , reduction (mathematics) , control system , voltage , mathematics , control (management) , engineering , electronic engineering , physics , geometry , quantum mechanics , artificial intelligence , electrical engineering , computer vision
A voltage source inverter with an LCL filter is often used for a utility interface to control its output current to a grid side because of its harmonic reduction advantages. The integral compensator is often used to reduce the steady‐state errors. However, there is always a control delay due to sinusoidal variations. This paper proposes a digital sinusoidal compensator which is based on the internal model principle to realize a fast sinusoidal response with no delay. It is based on the internal model principle to realize a response with no deviation for a periodic sinusoidal reference input. It has a simple numerator and a denominator z 2 − 2 z cos ωT + 1 of a transfer function which is equal to the z function of a sinusoidal waveform of the angular frequency ω and the sample time T . Compensator and feedback gains of the inverter are determined by the deadbeat or the optimal control principle. The proposed method is investigated for performances and it is validated through simulation and experimental results by a DSP control system. © 2013 Wiley Periodicals, Inc. Electr Eng Jpn, 183(2): 22–28, 2013; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.22339