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

Authors

Sridhar R. Pulikanti, University of WollongongFollow
M Ciobotaru, University of NSW
Vassilios G. Agelidis, University of New South Wales
Georgios S. Konstantinou, University of New South Wales

RIS ID

50696

Publication Details

Pulikanti, S. R., Konstantinou, G. S., Ciobotaru, M. & Agelidis, V. G. (2011). A DC-link voltage ripple compensation method for multilevel active-neutral-point-clamped converters operating with SHE-PWM. 37th Annual Conference of the IEEE Industrial Electronics Society, IECON 2011 (pp. 4354-4360). Australia: IEEE.

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.