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On the Optimization of Generators for Offshore Direct Drive Wind Turbines

Alasdair McDonald, Nurul Azim Bhuiyan, Nurul Azim Bhuiyan Orcid Logo

IEEE Transactions on Energy Conversion, Volume: 32, Issue: 1, Pages: 348 - 358

Swansea University Author: Nurul Azim Bhuiyan Orcid Logo

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DOI (Published version): 10.1109/TEC.2016.2624219

Abstract

The objective of this paper is to optimize direct drive permanent magnet synchronous generators for offshore direct drive wind turbines in order to reduce the cost of energy. A 6 MW wind turbine design is assumed and parametric electromagnetic and structural generator models are introduced for a sur...

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Published in: IEEE Transactions on Energy Conversion
ISSN: 0885-8969 1558-0059
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa40140
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last_indexed 2018-09-04T18:53:59Z
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spelling 2018-09-04T15:24:04.6461931 v2 40140 2018-05-14 On the Optimization of Generators for Offshore Direct Drive Wind Turbines 36b3a440ac5e333da9442e2820d11c63 0000-0002-1646-2096 Nurul Azim Bhuiyan Nurul Azim Bhuiyan true false 2018-05-14 AERO The objective of this paper is to optimize direct drive permanent magnet synchronous generators for offshore direct drive wind turbines in order to reduce the cost of energy. A 6 MW wind turbine design is assumed and parametric electromagnetic and structural generator models are introduced for a surface-mounted magnet generator topology (using magnets with high BHmax) and a flux-concentrating variant (using magnets with lower BHmax). These are optimized using a hybrid genetic algorithm and pattern search process and the results show that the surface-mounted permanent magnet generator produces the lower cost of energy. The choice of objective function is addressed and it is found that a simplified metric incorporating generator cost and losses proxy produces similar designs to a full cost of energy calculation. Further steps to improve the quality of the model include the effect of generator mass on the design and cost of the turbine tower and foundation, which can add €0.4 m to the turbine cost. Further optimizations are carried out to show the impacts of magnetic material costs (doubling this leads to a €1.1/MWh increase in cost of energy) and generator diameter limits (increasing the upper limit from 6 to 8 m leads to a 0.9% drop in cost of energy) have on the choice of optimum independent variables. Journal Article IEEE Transactions on Energy Conversion 32 1 348 358 0885-8969 1558-0059 31 12 2016 2016-12-31 10.1109/TEC.2016.2624219 https://pure.strath.ac.uk/portal/en/publications/on-the-optimization-of-generators-for-offshore-direct-drive-wind-turbines(80c21795-8774-4a95-8cd9-c54a4ab829bf).html COLLEGE NANME Aerospace Engineering COLLEGE CODE AERO Swansea University 2018-09-04T15:24:04.6461931 2018-05-14T11:27:01.6425855 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering Alasdair McDonald 1 Nurul Azim Bhuiyan 2 Nurul Azim Bhuiyan 0000-0002-1646-2096 3 0040140-19062018120313.pdf journalfinal.pdf 2018-06-19T12:03:13.6230000 Output 910506 application/pdf Accepted Manuscript true 2018-06-19T00:00:00.0000000 true eng
title On the Optimization of Generators for Offshore Direct Drive Wind Turbines
spellingShingle On the Optimization of Generators for Offshore Direct Drive Wind Turbines
Nurul Azim Bhuiyan
title_short On the Optimization of Generators for Offshore Direct Drive Wind Turbines
title_full On the Optimization of Generators for Offshore Direct Drive Wind Turbines
title_fullStr On the Optimization of Generators for Offshore Direct Drive Wind Turbines
title_full_unstemmed On the Optimization of Generators for Offshore Direct Drive Wind Turbines
title_sort On the Optimization of Generators for Offshore Direct Drive Wind Turbines
author_id_str_mv 36b3a440ac5e333da9442e2820d11c63
author_id_fullname_str_mv 36b3a440ac5e333da9442e2820d11c63_***_Nurul Azim Bhuiyan
author Nurul Azim Bhuiyan
author2 Alasdair McDonald
Nurul Azim Bhuiyan
Nurul Azim Bhuiyan
format Journal article
container_title IEEE Transactions on Energy Conversion
container_volume 32
container_issue 1
container_start_page 348
publishDate 2016
institution Swansea University
issn 0885-8969
1558-0059
doi_str_mv 10.1109/TEC.2016.2624219
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering
url https://pure.strath.ac.uk/portal/en/publications/on-the-optimization-of-generators-for-offshore-direct-drive-wind-turbines(80c21795-8774-4a95-8cd9-c54a4ab829bf).html
document_store_str 1
active_str 0
description The objective of this paper is to optimize direct drive permanent magnet synchronous generators for offshore direct drive wind turbines in order to reduce the cost of energy. A 6 MW wind turbine design is assumed and parametric electromagnetic and structural generator models are introduced for a surface-mounted magnet generator topology (using magnets with high BHmax) and a flux-concentrating variant (using magnets with lower BHmax). These are optimized using a hybrid genetic algorithm and pattern search process and the results show that the surface-mounted permanent magnet generator produces the lower cost of energy. The choice of objective function is addressed and it is found that a simplified metric incorporating generator cost and losses proxy produces similar designs to a full cost of energy calculation. Further steps to improve the quality of the model include the effect of generator mass on the design and cost of the turbine tower and foundation, which can add €0.4 m to the turbine cost. Further optimizations are carried out to show the impacts of magnetic material costs (doubling this leads to a €1.1/MWh increase in cost of energy) and generator diameter limits (increasing the upper limit from 6 to 8 m leads to a 0.9% drop in cost of energy) have on the choice of optimum independent variables.
published_date 2016-12-31T03:51:05Z
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score 10.997933

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