NDLI: State current controller with oscillatory terms for three-level grid-connected PWM rectifiers under distorted grid voltage conditions

Content Provider	IEEE Xplore Digital Library
Author	Galecki, A. Kaszewski, A. Ufnalski, B. Grzesiak, L.M.
Copyright Year	2015
Description	Author affiliation: Inst. of Control & Ind. Electron., WARSAW Univ. OF Technol., Warsaw, Poland (Galecki, A.; Kaszewski, A.; Ufnalski, B.; Grzesiak, L.M.)
Abstract	This paper presents the design of a control system of a three-phase three-level pulse-width modulated rectifier operated under unbalanced and distorted grid voltage conditions. The developed scheme is based on a voltage-oriented control method. Instead of proportional-integral current controllers a state-feedback current controller in rotating reference frame is used. In order to achieve a zero steady-state current control error in response to step commands, integral terms are incorporated into the current control scheme. Similarly, to ensure the rejection of the sinusoidal component of current control error caused by unbalance and distortion in the grid voltage, the oscillatory terms are added to the current control system. To calculate the current controller gains, an augmented plant model is developed and linear-quadratic optimization method is applied. The physical experiments indicate that using state-feedback current control with oscillatory terms allows for notable improvement of the shape of the input currents of the converter and increases the power conversion efficiency.
Starting Page	1
Ending Page	10
File Size	755434
Page Count	10
File Format	PDF
e-ISBN	9789075815221
DOI	10.1109/EPE.2015.7311674
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-09-08
Publisher Place	Switzerland
Access Restriction	Subscribed
Rights Holder	EPE Association and IEEE
Subject Keyword	current control power harmonic filters Pulse width modulation Harmonic analysis State-space methods Voltage control pulse width modulation converters Power harmonic filters Current control linear-quadratic regulator DC-AC power converters state feedback Mathematical model
Content Type	Text
Resource Type	Article

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