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Energies 2017, 10(4), 504; doi:10.3390/en10040504

Output Voltage Quality Evaluation of Stand-alone Four-Leg Inverters Using Linear and Non-Linear Controllers

1
INESC-ID, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
2
Instituto Superior de Engenharia de Lisboa, Polytechnic Institute of Lisbon, 1959-007 Lisboa, Portugal
*
Author to whom correspondence should be addressed.
Academic Editor: José Gabriel Oliveira Pinto
Received: 7 February 2017 / Revised: 21 March 2017 / Accepted: 29 March 2017 / Published: 9 April 2017
(This article belongs to the Special Issue Power Electronics in Power Quality)

Abstract

This paper presents the design and experimental voltage quality evaluation of controllers for the output voltages of 3-phase four-leg voltage source inverters. These inverters are needed in stand-alone power systems to supply linear and non-linear, balanced or unbalanced loads with constant RMS value voltages at fixed frequency. Comparisons include closed loop outer voltage controllers based on predictive, sliding mode and decoupled proportional-integral controllers in dqo synchronous space, fitted with an inner hysteretic current loop vector controller in α β γ space. The 3-phase four-leg VSI output voltages waveform quality is analysed under unbalanced and non-linear loads. View Full-Text
Keywords: stand-alone four-leg inverter; non-linear voltage vector modulator; voltage waveform quality stand-alone four-leg inverter; non-linear voltage vector modulator; voltage waveform quality
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Luís, R.; Silva, J.F.; Quadrado, J.C. Output Voltage Quality Evaluation of Stand-alone Four-Leg Inverters Using Linear and Non-Linear Controllers. Energies 2017, 10, 504.

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