Multi-Port High Voltage Gain Modular Power Converter for Offshore Wind Farms

Song, Sen, Hu, Yihua ORCID: 0000-0002-1007-1617, Ni, Kai ORCID: 0000-0002-7467-2921, Yan, Joseph, Chen, Guipeng, Wen, Huiqing and Ye, Xianming (2018) Multi-Port High Voltage Gain Modular Power Converter for Offshore Wind Farms. SUSTAINABILITY, 10 (7). p. 2176.

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Official URL: http://dx.doi.org/10.3390/su10072176

Abstract

In high voltage direct current (HVDC) power transmission of offshore wind power systems, DC/DC converters are applied to transfer power from wind generators to HVDC terminals, and they play a crucial role in providing a high voltage gain, high efficiency, and high fault tolerance. This paper introduces an innovative multi-port DC/DC converter with multiple modules connected in a scalable matrix configuration, presenting an ultra-high voltage step-up ratio and low voltage/current rating of components simultaneously. Additionally, thanks to the adoption of active clamping current-fed push-pull (CFPP) converters as sub-modules (SMs), soft-switching is obtained for all power switches, and the currents of series-connected CFPP converters are auto-balanced, which significantly reduce switching losses and control complexity. Furthermore, owing to the expandable matrix structure, the output voltage and power of a modular converter can be controlled by those of a single SM, or by adjusting the column and row numbers of the matrix. High control flexibility improves fault tolerance. Moreover, due to the flexible control, the proposed converter can transfer power directly from multiple ports to HVDC terminals without bus cable. In this paper, the design of the proposed converter is introduced, and its functions are illustrated by simulation results.

Item Type:	Article
Uncontrolled Keywords:	high voltage direct current (HVDC), power transmission, DC/DC converter, high voltage gain, modular, multi-port
Depositing User:	Symplectic Admin
Date Deposited:	05 Sep 2018 09:33
Last Modified:	19 Jan 2023 01:25
DOI:	10.3390/su10072176
Open Access URL:	http://www.mdpi.com/2071-1050/10/7/2176
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3025883