A Review of AC and DC Collection Grids for Offshore Renewable Energy with a Qualitative Evaluation for Marine Energy Resources

Christoffer Fjellstedt (), Md Imran Ullah, Johan Forslund, Erik Jonasson, Irina Temiz and Karin Thomas
Additional contact information
Christoffer Fjellstedt: Department of Electrical Engineering, Division of Electricity, Uppsala University, Box 65, 751 03 Uppsala, Sweden
Md Imran Ullah: Department of Electrical Engineering, Division of Electricity, Uppsala University, Box 65, 751 03 Uppsala, Sweden
Johan Forslund: Department of Electrical Engineering, Division of Electricity, Uppsala University, Box 65, 751 03 Uppsala, Sweden
Erik Jonasson: Department of Electrical Engineering, Division of Electricity, Uppsala University, Box 65, 751 03 Uppsala, Sweden
Irina Temiz: Department of Electrical Engineering, Division of Electricity, Uppsala University, Box 65, 751 03 Uppsala, Sweden
Karin Thomas: Department of Electrical Engineering, Division of Electricity, Uppsala University, Box 65, 751 03 Uppsala, Sweden

Energies, 2022, vol. 15, issue 16, 1-26

Abstract: Marine energy resources could be crucial in meeting the increased demand for clean electricity. To enable the use of marine energy resources, developing efficient and durable offshore electrical systems is vital. Currently, there are no large-scale commercial projects with marine energy resources, and the question of how to design such electrical systems is still not settled. A natural starting point in investigating this is to draw on experiences and research from offshore wind power. This article reviews different collection grid topologies and key components for AC and DC grid structures. The review covers aspects such as the type of components, operation and estimated costs of commercially available components. A DC collection grid can be especially suitable for offshore marine energy resources, since the transmission losses are expected to be lower, and the electrical components could possibly be made smaller. Therefore, five DC collection grid topologies are proposed and qualitatively evaluated for marine energy resources using submerged and non-submerged marine energy converters. The properties, advantages and disadvantages of the proposed topologies are discussed, and it is concluded that a suitable electrical system for a marine energy farm will most surely be based on a site-specific techno-economic analysis.

Keywords: AC and DC collection grids; offshore renewable energy; electrical systems (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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