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

Author

Celanovic, Nikola ; Boroyevich, Dushan

Author_Institution

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

Volume

15

Issue

2

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

242

Lastpage

249

Abstract

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

Keywords

DC-AC power convertors; PWM invertors; load (electric); switching circuits; DQ coordinate frame model; current switching functions; loading conditions; low-frequency ripple; neutral-point voltage balancing; three-level neutral-point-clamped voltage source PWM inverters; Application software; Capacitors; Magnetic separation; Power semiconductor devices; Power semiconductor switches; Pulse width modulation; Pulse width modulation inverters; Switching frequency; Topology; Voltage;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.838096

Filename

838096