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Reliability and economic evaluation of offshore wind power DC collection systems

Sun, Ruijuan, Abeynayake, Gayan, Liang, Jun and Wang, Kewen 2021. Reliability and economic evaluation of offshore wind power DC collection systems. Energies 14 (10) , 2922. 10.3390/en14102922

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Abstract

One key directive to realize the global transition towards net-zero emission goals is to integrate more renewable energy resources into the generation mix. Due to higher and more consistent wind speeds, offshore wind farms (OWFs) have the potential to generate more energy at a steadier rate than their onshore counterpart. However, at the collection system level, all the OWFs use alternating current (AC) technology at present. Nonetheless, with an increasing capacity of the single wind turbine (WT) and larger distances to the shore, the use of direct current (DC) technology at the collection system level is beneficial. To select a suitable DC collection system topology, this paper proposes a comprehensive analytical reliability evaluation method, based on the Universal Generating Function technique, together with associated economic factors. Four candidates DC collection system options were evaluated with different WT capacities for a 400 MW OWF. The availability indices such as Generation Ratio Availability and Expected Energy Not Supplied were used to assess their reliability levels. The results show that the radial topology with a single platform DC/DC converter is more reliable and economical than the other candidate options.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: MDPI
ISSN: 1996-1073
Date of First Compliant Deposit: 11 June 2021
Date of Acceptance: 14 May 2021
Last Modified: 11 Jun 2021 10:15
URI: https://orca.cardiff.ac.uk/id/eprint/141850

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