Title :
Selective harmonic elimination pulse-width modulation of modular multilevel converters
Author :
Konstantinou, Georgios ; Ciobotaru, Mihai ; Agelidis, Vassilios G.
Author_Institution :
Sch. of Electr. Eng. & Telecommun. & Australian Energy Res. Inst., Univ. of New South Wales, Sydney, NSW, Australia
Abstract :
The modular multilevel converter (MMC) is the state-of-the-art for multilevel converter topologies. This study presents the operation of the MMC using the multilevel selective harmonic elimination pulse-width modulation (MSHE-PWM) technique. MSHE-PWM offers tight control of the low-order harmonics and the lowest switching frequency for the power semiconductors among all modulation techniques. A comprehensive analysis of the modulation methods for the MMC leads to two different modulation patterns for MSHE-PWM. A method for selecting the number of sub-modules in the phase-legs of the converter is also proposed in this study. Simulation results for both patterns are provided and verified through matching experimental results from a single phase 11-level laboratory prototype.
Keywords :
PWM power convertors; harmonics suppression; switching convertors; MMC topology; MSHE-PWM technique; low-order harmonic control; modular multilevel converter; multilevel selective harmonic elimination pulse-width modulation technique; power semiconductor; switching frequency;
Journal_Title :
Power Electronics, IET
DOI :
10.1049/iet-pel.2012.0228
