Input Current Harmonics in a Regenerative Multicell Inverter With Single-Phase PWM Rectifiers
Lezana, P.
Rodriguez, J.
Perez, M.A.
Espinoza, J.
Dept. de Electr., Univ. Tec. Federico Santa Maria, Valparaiso;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Feb. 2009
Volume: 56,
Issue: 2
On page(s): 408-417
ISSN: 0278-0046
INSPEC Accession Number: 10469639
Digital Object Identifier: 10.1109/TIE.2008.2009200
First Published: 2008-11-11
Current Version Published: 2009-02-02
Abstract
Harmonics are a very important issue in the design and operation of medium-voltage inverter drives, due to restrictions imposed by regulations. This paper studies the harmonics generated by a three-phase multicell cascade inverter, with single-phase pulsewidth modulation rectifiers at the input side of each cell; thus, the entire topology is able to regenerate power to the net. This paper identifies accurately the harmonic generation process in the dc-link voltage, the input current of each cell, and, therefore, at the input side of the inverter. Moreover, this paper proposes a method to reduce and, in some cases, eliminate the input current harmonics, reaching a very high input power factor for any operation condition. Simulation and experimental results are provided to validate the theoretical analysis.
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