Journal cover Journal topic
Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
Journal topic
Discussion papers
https://doi.org/10.5194/wes-2020-19
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2020-19
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 25 Feb 2020

Submitted as: research article | 25 Feb 2020

Review status
This preprint is currently under review for the journal WES.

Comparison of electrical collection topologies for multi-rotor wind turbines

Paul Pirrie, David Campos-Gaona, and Olimpo Anaya-Lara Paul Pirrie et al.
  • Wind and Marine Energy Systems CDT, University of Strathclyde, Royal College Building, 204 George Street, Glasgow, Scotland

Abstract. Multi-rotor wind turbines (MRWT) have been suggested in literature as a solution to achieving wind turbine systems with capacities greater than 10 MW. MWRT's utilise a large number of small rotors connected to one support structure instead of one large rotor, with the aim of circumventing the square cube law. Potential benefits of MRWT's include cost and material savings, standardisation of parts, increased control possibilities and improved logistics for assembly and maintenance. Almost all previous work has focused on mechanical and aerodynamic feasibility, with almost no attention being paid to the electrical systems. In this research eight different topologies of the electrical collection network for MRWT's are analysed to assess which are the most economically and practically viable options. AC and DC collection networks are presented in radial, star, cluster and DC series topologies. Mass, capital cost and losses are estimated based on scaling relationships from academic literature and up to date commercial data. The focus of this study is the assessment of the type of electrical collector topology so component type and voltage level are kept consistent between topology designs in order to facilitate a fair comparison. Topologies are compared in terms of four main criteria; capital cost, cost effectiveness, total mass, and reliability. The most suitable collection topology for MRWT's is shown to be of the star type, in which each turbine is connected to the step up transformer via its own cable. DC topologies are generally found to be more expensive when compared to their AC counterparts due to the high cost of DC-DC converters and DC switchgear.

Paul Pirrie et al.

Interactive discussion

Status: open (until 20 Apr 2020)
Status: open (until 20 Apr 2020)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement

Paul Pirrie et al.

Paul Pirrie et al.

Viewed

Total article views: 163 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
116 43 4 163 4 4
  • HTML: 116
  • PDF: 43
  • XML: 4
  • Total: 163
  • BibTeX: 4
  • EndNote: 4
Views and downloads (calculated since 25 Feb 2020)
Cumulative views and downloads (calculated since 25 Feb 2020)

Viewed (geographical distribution)

Total article views: 77 (including HTML, PDF, and XML) Thereof 76 with geography defined and 1 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved

No saved metrics found.

Discussed

No discussed metrics found.
Latest update: 29 Mar 2020
Publications Copernicus
Download
Short summary
Multi-rotor wind turbines are an innovative solution to achieving cost effective large scale wind turbines. They utilize a large number of small rotors connected to one support structure instead of one large rotor. Benefits include reduction in cost, transport and installation simplicity, modular design and standardization. This work compares different electrical systems in terms of cost, mass and efficiency and finds a star type system (each rotor has its own cable) to be the most suitable.
Multi-rotor wind turbines are an innovative solution to achieving cost effective large scale...
Citation