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

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

doi:10.1002/tee.22691

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

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

^*Corresponding author for this work

Electronic And Electrical Engineering

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	1255-1264
Number of pages	10
Journal	IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING
Volume	13
Issue number	9
Early online date	21 May 2018
DOIs	https://doi.org/10.1002/tee.22691
Publication status	Published - 1 Sept 2018

Keywords

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

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10.1002/tee.22691

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title = "Cascaded LC-AC transformer unidirectional DC/DC converter with high stepping ratio",

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.",

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T1 - Cascaded LC-AC transformer unidirectional DC/DC converter with high stepping ratio

AU - Li, Mengbo

AU - Xiang, Wang

AU - Yao, Liangzhong

AU - Xie, Zhujun

AU - Lin, Weixing

AU - Wen, Jinyu

PY - 2018/9/1

Y1 - 2018/9/1

N2 - 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.

AB - 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.

KW - DC power systems

KW - DC power transmission

KW - DC/DC power conversion

KW - MVDC transmission

KW - renewable energy

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

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