Proposal of a series configuration hybrid ac power source

Author

Beltrame, R.C. ; Desconzi, M.I. ; Rech, C. ; Hey, H.L. ; Martins, M. L da Silva

Author_Institution

Power Electron. & Control Res. Group - GEPOC, Fed. Univ. of Santa Maria - UFSM, Santa Maria, Brazil

fYear

2011

fDate

17-22 Sept. 2011

Firstpage

2058

Lastpage

2064

Abstract

With the aim of synthesizing high quality voltage waveforms without penalizing the system efficiency, this paper proposes to implement a hybrid ac power source (ACPS) associating in series a cascaded multilevel inverter topology, operating as main amplifier, with a low-voltage/low-power linear power amplifier (LPA), operating as correction amplifier. Considerations about the modulation strategy, control approach and design methodology are presented and investigated through the paper. The theoretical analysis is confirmed by means of experimental results from a 500 W IGBT based laboratory prototype composed of an asymmetrical cascaded multilevel inverter associated with a commercial low-power LPA. The ACPS performance was evaluated under linear and nonlinear loads, along with under a load step.

Keywords

insulated gate bipolar transistors; invertors; low-power electronics; power amplifiers; IGBT based laboratory prototype; asymmetrical cascaded multilevel inverter; commercial low-power LPA; correction amplifier; high quality voltage waveform synthesis; linear loads; low-voltage-low-power linear power amplifier; modulation strategy; nonlinear loads; power 500 W; series configuration hybrid AC power source; Inverters; Low pass filters; Modulation; Power amplifiers; Topology; Transfer functions; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2011 IEEE

Conference_Location

Phoenix, AZ

Print_ISBN

978-1-4577-0542-7

Type

conf

DOI

10.1109/ECCE.2011.6064040

Filename

6064040