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Control and experiment of pulsewidth-modulated modular multilevel converters
- Source :
- IEEE Transactions on Power Electronics. July-August, 2009, Vol. 24 Issue 7-8, p1737, 10 p.
- Publication Year :
- 2009
-
Abstract
- A modular multilevel converter (MMC) is one of the next-generation multilevel converters intended for high- or medium-voltage power conversion without transformers. The MMC is based on cascade connection of multiple bidirectional chopper-cells per leg, thus requiring voltage-balancing control of the multiple floating dc capacitors. However, no paper has made an explicit discussion on voltage-balancing control with theoretical and experimental verifications. This paper deals with two types of pulsewidth-modulated modular multilevel converters (PWM-MMCs) with focus on their circuit configurations and voltage-balancing control. Combination of averaging and balancing controls enables the PWM-MMCs to achieve voltage balancing without any external circuit. The viability of the PWM-MMCs, as well as the effectiveness of the voltage-balancing control, is confirmed by simulation and experiment. Index Terms--Medium-voltage power conversion, multilevel converters, voltage-balancing control.
Details
- Language :
- English
- ISSN :
- 08858993
- Volume :
- 24
- Issue :
- 7-8
- Database :
- Gale General OneFile
- Journal :
- IEEE Transactions on Power Electronics
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.207226026