A DC-link voltage ripple compensation method for multilevel active-neutral-point-clamped converters operating with SHE-PWM

Author

Pulikanti, Sridhar R. ; Konstantinou, Georgios S. ; Ciobotaru, Mihai ; Agelidis, Vassilios G.

Author_Institution

Sch. of Electr., Comput. & Telecommun. Eng., Univ. of Wollongong, Wollongong, NSW, Australia

fYear

2011

fDate

7-10 Nov. 2011

Firstpage

4354

Lastpage

4360

Abstract

This paper presents a DC-link voltage ripple compensation method for the five-level flying capacitor (FC) based active-neutral-point-clamped (ANPC) converter operating with selective harmonic elimination pulse width modulation (SHE-PWM). The compensation method modifies the modulation index according to the DC-link voltage ripple, which in turns alters the switching functions. The modification of the switching functions alleviates the effect of the DC-link voltage ripple on the output voltage. A control strategy is implemented to regulate the voltages across the FCs and the DC-link capacitors to their reference voltage levels. The performance of the compensation method is evaluated with experimental results taken from a low power laboratory prototype.

Keywords

PWM power convertors; capacitors; harmonics suppression; switching convertors; voltage control; DC-link capacitor; DC-link voltage ripple compensation method; SHE-PWM; control strategy; five-level FC; five-level flying capacitor; low power laboratory prototype; modulation index; multilevel ANPC converter; multilevel active-neutral-point-clamped converter; selective harmonic elimination pulse width modulation; switching function; voltage regulation; Capacitors; Harmonic analysis; Pulse width modulation; Switches; Voltage control; Active neutral-point clamped converter; multilevel converter; pulse width modulation; selective harmonic elimination;

fLanguage

English

Publisher

ieee

Conference_Titel

IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society

Conference_Location

Melbourne, VIC

ISSN

1553-572X

Print_ISBN

978-1-61284-969-0

Type

conf

DOI

10.1109/IECON.2011.6120025

Filename

6120025