Multiple-module high-gain high-voltage DCDC transformers for offshore wind energy systems

Nicholas Denniston, Ahmed M. Massoud, Shehab Ahmed, Prasad N. Enjeti

Research output: Contribution to journalArticle

118 Citations (Scopus)

Abstract

Renewable energy sources, such as offshore wind farms, require high voltage gains in order to interface with power transmission networks. These conversions are normally made using bulky, complex, and costly transformers and high-voltage acdc converters with unnecessary bidirectional power flow capability. Multiple modules of single-switch single-inductor dcdc converters can reach high gains without transformers in these applications due to low semiconductor conduction loss in high-power devices. This paper describes a new approach for high-gain high-voltage dcdc converters using multiple modules of single-switch single-inductor transformerless converters. Results for low-voltage experimental prototypes show gains of up to 29 p.u. and demonstrate the potential of the approach as high-gain dcdc converters for offshore wind farms. This paper then demonstrates the viability of multiple-module converters compared to a conventional high-voltage dc converter and a theoretical full-bridge converter due to fewer devices and valves, comparable isolation levels, and ease of interleaving for increased reliability.

Original languageEnglish
Article number5491162
Pages (from-to)1877-1886
Number of pages10
JournalIEEE Transactions on Industrial Electronics
Volume58
Issue number5
DOIs
Publication statusPublished - May 2011

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Keywords

  • DCDC transformers
  • high-voltage DC transmission
  • offshore wind energy

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computer Science Applications
  • Electrical and Electronic Engineering

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