Abstract
High-power and high-voltage gain dc-dc converters are key to high-voltage direct current (HVDC) power transmission for offshore wind power. This paper presents an isolated ultra-high step-up dc-dc converter in matrix transformer configuration. A flyback-forward converter is adopted as the power cell and the secondary side matrix connection is introduced to increase the power level and to improve fault tolerance. Because of the modular structure of the converter, the stress on the switching devices is decreased and so is the transformer size. The proposed topology can be operated in column interleaved modes, row interleaved modes, and hybrid working modes in order to deal with the varying energy from the wind farm. Furthermore, fault-tolerant operation is also realized in several fault scenarios. A 400-W dc-dc converter with four cells is developed and experimentally tested to validate the proposed technique, which can be applied to high-power high-voltage dc power transmission.
| Original language | English |
|---|---|
| Pages (from-to) | 2190-2202 |
| Number of pages | 13 |
| Journal | IEEE Transactions on Industrial Electronics |
| Volume | 63 |
| Issue number | 4 |
| Early online date | 22 Dec 2015 |
| DOIs | |
| Publication status | Published - Apr 2016 |
Bibliographical note
© 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Keywords
- DC–DC converter
- high step-up
- high-voltage direct current
- HVDC
- matrix transformer