Pulse width modulation for reduction of power losses in three-phase neutral point clamped inverters

Author

Andrade, Abinadabe S. ; Barros, Luciano M. ; Silva, Edison R C da ; Jacobina, Cursino B.

Author_Institution

Dept. of Electr. Eng., Fed. Univ. of Campina Grande, Campina Grande, Brazil

fYear

2012

fDate

15-20 Sept. 2012

Firstpage

1746

Lastpage

1752

Abstract

This paper investigates the digital implementation of a modulation strategy that can completely remove the low-frequency voltage oscillation, which appears in the neutral point, for all the operating points and for any kind of loads. The implementation is based on a hybrid modulation technique that produces low switching losses and is simple to implement. Losses, average switching frequency, and performance in terms of voltage balance and low frequency neutral point oscillation, THD, and WTHD are investigated. Simulation and experimental results confirm the feasibility of the approach.

Keywords

PWM invertors; WTHD; digital implementation; hybrid modulation technique; low frequency neutral point oscillation; low switching losses; low-frequency voltage oscillation removal; power losses reduction; pulse width modulation; three-phase neutral point clamped inverters; voltage balance; Capacitors; Inverters; Oscillators; Pulse width modulation; Switches; Switching frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2012 IEEE

Conference_Location

Raleigh, NC

Print_ISBN

978-1-4673-0802-1

Electronic_ISBN

978-1-4673-0801-4

Type

conf

DOI

10.1109/ECCE.2012.6342601

Filename

6342601