A comprehensive study of neutral-point voltage balancing problem in three-level neutral-point-clamped voltage source PWM inverters

Author

Celanovic, Nikola ; Borojevic, Dusan

Author_Institution

Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

Volume

1

fYear

1999

fDate

14-18 Mar 1999

Firstpage

535

Abstract

This paper explores the fundamental limitations of neutral-point voltage balancing problem for different loading conditions of three level voltage source inverters. A new model in DQ coordinate frame utilizing current switching functions is developed, as a means to investigate theoretical limitations and lend more intuitive insight into the problem. The low frequency ripple of the neutral point caused by certain loading conditions is observed and quantified

Keywords

PWM power convertors; switching circuits; DQ coordinate frame; current switching functions; loading conditions; low frequency ripple; neutral-point voltage balancing; neutral-point-clamped voltage source PWM inverters; three level voltage source inverters; three-level PWM inverters; Circuits; Frequency; Magnetic separation; Power electronics; Power harmonic filters; Power semiconductor devices; Power semiconductor switches; Pulse width modulation inverters; Topology; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual

Conference_Location

Dallas, TX

Print_ISBN

0-7803-5160-6

Type

conf

DOI

10.1109/APEC.1999.749733

Filename

749733