Output voltage quality evaluation of stand-alone four-leg inverters using linear and non-linear controllers

Luís, Ricardo; Silva, José Fernando; Quadrado, José Carlos

http://hdl.handle.net/10400.21/7667

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Authors

Luís, Ricardo

Silva, José Fernando

Quadrado, José Carlos

Abstract(s)

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 alpha beta gamma space. The 3-phase four-leg VSI output voltages waveform quality is analysed under unbalanced and non-linear loads.

Keywords

Stand-alone four-leg inverter Non-linear voltage vector modulator Voltage waveform quality

URI

http://hdl.handle.net/10400.21/7667

Citation

LUÍS, Ricardo; SILVA, José Fernando; QUADRADO, José Carlos - Output voltage quality evaluation of stand-alone four-leg inverters using linear and non-linear controllers. Energies. ISSN 1996-1073. Vol. 10, N.º 4 (2017), pp. 1-20