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Unidirectional DC/DC Modular Multilevel Converter for Offshore Windfarm with the Control Strategy Based on Stationary Frame

Lookup NU author(s): He Liu Liu, Dr Mohamed Dahidah, Dr Matthew Armstrong



This is the authors' accepted manuscript of an article that has been published in its final definitive form by IET, 2019.

For re-use rights please refer to the publisher's terms and conditions.


This paper presents the design and control of an advancedunidirectional DC/DC Modular Multilevel Converter (MMC)that facilitate the integration of off-shore windfarms with theHigh-Voltage Direct Current (HVDC) transmission system.The proposed converter deploys a single-phase MMC invertercoupled with series-connected rectifier modules throughmultiple medium frequency transformers. Unlike theconventional d-q control method, which involves multipletransformations, this paper also proposes a simple controlstrategy that directly act on the ac output of the MMC, underthe stationary reference frame.

Publication metadata

Author(s): Liu H, Dahidah MSA, Naayagi RT, Armstrong M, Yu J

Publication type: Article

Publication status: Published

Journal: IET Journal of Engineering

Year: 2019

Volume: 2019

Issue: 17

Pages: 4309-4314

Online publication date: 17/06/2019

Acceptance date: 27/07/2018

Date deposited: 03/09/2018

ISSN (electronic): 2051-3305

Publisher: IET


DOI: 10.1049/joe.2018.8003


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