Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 28, Issue 7, Pages 3459-3468Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2012.2227509
Keywords
Control systems; current control; dc-ac power conversion; digital control; discrete-time signals; distributed generation; finite control set (FCS) model predictive control (MPC); four-leg converters; grid-connected; shunt active power filters (SAPFs)
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Funding
- Basal Project [FB0821]
- Universidad Tecnica Federico Santa Maria
- CONICYT Initiation into Research Project [2012 11121492]
- Natural Sciences and Engineering Research Council of Canada through Wind Energy Strategic Network Project 3.1
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In this paper, a simple model predictive current control strategy is proposed for four-leg inverters to deliver power to the (un) balanced/(non)linear loads. Unlike classical control schemes, the proposed method does not require current PI controllers or a complex modulation stage. The discrete-time model of the inverter, filter, and load are used to predict the future behavior of the load currents for each of the 16 possible switching states. The control method chooses a switching state that minimizes the error between the output currents and their references. The performance of the proposed method has been investigated for perturbations in the filter and load parameters. The neutral-leg switching frequency reduction algorithm is also proposed to improve the efficiency of the converter. The feasibility of the proposed method is verified in this first part, through simulation results.
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