High-Power Multilevel Step-Up DC/DC Converter for Offshore Wind Energy Systems
Artikel i vetenskaplig tidskrift, 2016

This paper presents a multilevel step-up dc/dc converter for dc-grid-based offshore wind energy conversion applications. The main features of the proposed multilevel converter are as follows: 1) the voltage stress of the power devices can be reduced, making it suitable for high-voltage applications; 2) the boost inductor can be reduced significantly, leading to the outstanding dynamic performance; and 3) high-voltage gain can be obtained and thus is well-suited for high-gain applications. Theoretical analysis was carried out for a four-level step-up converter, based on which, the converter can be extended to any arbitrary number of levels. The proposed four-level converter was verified by a simulation and evaluated by comparing with a conventional multilevel dc/dc converter in terms of the component stress and power device count. The developed topology was implemented on a 2-kW prototype converter to evaluate its feasibility.

high-voltage gain

multilevel step-up converter

DC-grid-based offshore wind energy


A. Gandomkar

Yeungnam University

Amir Parastar

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

J. K. Seok

Yeungnam University

IEEE Transactions on Industrial Electronics

0278-0046 (ISSN)

Vol. 63 12 7574-7585


Elektroteknik och elektronik



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