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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Kenzelmann, S. Dujic, D. Canales, F. de Novaes, Y.R. Rufer, A. |
| Copyright Year | 2012 |
| Description | Author affiliation: Laboratoire d'électronique industrielle, EPFL-STI-ISE-LEI, Station 11, 1015 Lausanne, Switzerland (Kenzelmann, S.; Rufer, A.) || nPEE-DEE-CCT-UDESC, Universidade do Estado de Santa Catarina, CEP 89223-100, Joinville, Brasil (de Novaes, Y.R.) || ABB Switzerland Ltd, Corporate Research, 5405 Baden-Dättwil, Switzerland (Dujic, D.; Canales, F.) |
| Abstract | This paper presents a bidirectional modular DC/DC converter. It consists of two Modular Multilevel Converters (MMC) linked by a transformer to achieve galvanic isolation. This topology serves as “DC transformer” interfacing low and medium voltage DC grids. By the means of the “front-to-front” connection, the converter is able to handle short circuits without additional protection. A higher operating frequency makes it possible to decrease the size of the transformer, the capacitors and the branch inductances. Two fundamental frequency modulation methods are presented with the aim to reduce the switching frequencies without penalizing the performance of the transformer. The multilevel modulation yields a conventional staircase voltage waveform, whereas the two-level modulation, which is inspired by the conventional double active bridge converter, results in a two-level voltage waveform. A case study of a wind power converter will serve as point of comparison between the two methods. The semiconductor losses are evaluated and the efficiencies for different transformer designs are discussed. |
| File Size | 1119297 |
| File Format | |
| ISBN | 9781467319706 |
| e-ISBN | 9781467319720 |
| e-ISBN | 9781467319713 |
| DOI | 10.1109/EPEPEMC.2012.6397405 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2012-09-04 |
| Publisher Place | Serbia |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Insulated gate bipolar transistors Switches Switching frequency Frequency modulation Semiconductor diodes DC-DC power converters DC grids Modular Multilevel Converter DC/DC converter Modulation methods Loss evaluation |
| Content Type | Text |
| Resource Type | Article |
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