Cascaded LC-AC transformer unidirectional DC/DC converter with high stepping ratio

Mengbo Li, Wang Xiang, Liangzhong Yao, Zhujun Xie, Weixing Lin, Jinyu Wen

Research output: Contribution to journalArticle

Abstract

This paper proposes a unidirectional DC/DC converter termed LCT DC/DC, which has a high stepping ratio and is suitable for integrating renewable energy sources. The LCT DC/DC converter consists of four power modules, and each of them is composed of a voltage source converter (VSC), an inductor−capacitor circuit, an AC transformer, and a diode rectifier bridge. By means of the two-stage voltage boost, a step-up ratio as high as 40 is achieved. The topology, operating principle, and design procedure of the LCT DC/DC are elaborated. Then, the active power control strategy and power loss estimation are studied. Finally, the technical feasibility of the proposed topology is validated by simulations in PSCAD/EMTDC.

Original languageEnglish
Pages (from-to)1255-1264
Number of pages10
JournalIEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING
Volume13
Issue number9
Early online date21 May 2018
DOIs
Publication statusPublished - 1 Sep 2018

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Keywords

  • DC power systems
  • DC power transmission
  • DC/DC power conversion
  • MVDC transmission
  • renewable energy

Cite this

Li, M., Xiang, W., Yao, L., Xie, Z., Lin, W., & Wen, J. (2018). Cascaded LC-AC transformer unidirectional DC/DC converter with high stepping ratio. IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING, 13(9), 1255-1264. https://doi.org/10.1002/tee.22691