Reliability and Economic Evaluation of Offshore Wind Power DC Collection Systems

Ruijuan Sun, Gayan Abeynayake, Jun Liang and Kewen Wang
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Ruijuan Sun: School of Electrical Engineering, Zhengzhou University, Zhengzhou 450001, China
Gayan Abeynayake: School of Engineering, Cardiff University, Cardiff CF24 3AA, UK
Jun Liang: School of Engineering, Cardiff University, Cardiff CF24 3AA, UK
Kewen Wang: School of Electrical Engineering, Zhengzhou University, Zhengzhou 450001, China

Energies, 2021, vol. 14, issue 10, 1-24

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.

Keywords: DC collection system; economic; offshore wind power; reliability; universal generating function (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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