Model Predictive Control of an Inverter With Output $LC$ Filter for UPS Applications
Cortes, P.
Ortiz, G.
Yuz, J.I.
Rodriguez, J.
Vazquez, S.
Franquelo, L.G.
Electron. Eng. Dept., Univ. Tec. Federico Santa Maria, Valparaiso;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: June 2009
Volume: 56,
Issue: 6
On page(s): 1875-1883
ISSN: 0278-0046
INSPEC Accession Number: 10713192
Digital Object Identifier: 10.1109/TIE.2009.2015750
First Published: 2009-02-27
Current Version Published: 2009-06-02
Abstract
The use of an inverter with an output LC filter allows for generation of output sinusoidal voltages with low harmonic distortion, suitable for uninterruptible power supply systems. However, the controller design becomes more difficult. This paper presents a new and simple control scheme using predictive control for a two-level converter. The controller uses the model of the system to predict, on each sampling interval, the behavior of the output voltage for each possible switching state. Then, a cost function is used as a criterion for selecting the switching state that will be applied during the next sampling interval. In addition, an observer is used for load-current estimation, enhancing the behavior of the proposed controller without increasing the number of current sensors. Experimental results under linear and nonlinear load conditions, with a 5.5-kW prototype, are presented, verifying the feasibility and good performance of the proposed control scheme.
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