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Control and Experiment of an H-Bridge-Based Three-Phase Three-Stage Modular Power Electronic Transformer.
- Source :
-
IEEE Transactions on Power Electronics . Mar2016, Vol. 31 Issue 3, p2002-2011. 10p. - Publication Year :
- 2016
-
Abstract
- Compared with conventional power transformer, the power electronic transformer (PET) or solid-state transformer has many attractive additional features. This paper focuses on an H-bridge-based three-phase three-stage modular PET, which consists of an input stage with series-connected H-bridge converters, an isolation stage with several independent dual-active-bridge converters, and an output stage with parallel-connected H-bridge converters. This PET suffers dc-link capacitor voltage unbalancing issue, and the parallel-connected module current unbalancing sharing issue. In this paper, a system control structure is proposed for the PET to deal with these issues. Different input-stage individual module dc-link voltage balancing control methods are analyzed and compared. It is found that the one implemented by directly trimming module output voltage amplitude is most suitable for PET. Moreover, a downscaled laboratory prototype is designed, built, and tested to verify the control strategy. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 08858993
- Volume :
- 31
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Power Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 111152939
- Full Text :
- https://doi.org/10.1109/TPEL.2015.2434420