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Optimisation and comparison of generators with different magnet materials for a 6MW offshore direct drive wind turbine

N.A. Bhuiyan, A. McDonald, Nurul Azim Bhuiyan Orcid Logo

Power Electronics, Machines and Drives (PEMD 2016), 8th IET International Conference on, Issue: CP684

Swansea University Author: Nurul Azim Bhuiyan Orcid Logo

DOI (Published version): 10.1049/cp.2016.0300

Abstract

Abstract:In the past few years interest in the use of low speed permanent magnet generators for direct-drive wind turbine generator applications has increased significantly. The significant fluctuations in NdFeB magnet prices has encouraged designers to optimise magnet utilisation and to look at alt...

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Published in: Power Electronics, Machines and Drives (PEMD 2016), 8th IET International Conference on
ISBN: 978-1-78561-188-9 978-1-78561-189-6
Published: Glasgow, UK 8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016) 2016
Online Access: https://pure.strath.ac.uk/portal/en/publications/optimisation-and-comparison-of-generators-with-different-magnet-materials-for-a-6mw-offshore-direct-drive-wind-turbine(3f3fb023-f987-4402-8729-a67f9fcb4800).html
URI: https://cronfa.swan.ac.uk/Record/cronfa40139
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spelling 2018-08-06T14:39:08.5158879 v2 40139 2018-05-14 Optimisation and comparison of generators with different magnet materials for a 6MW offshore direct drive wind turbine 36b3a440ac5e333da9442e2820d11c63 0000-0002-1646-2096 Nurul Azim Bhuiyan Nurul Azim Bhuiyan true false 2018-05-14 AERO Abstract:In the past few years interest in the use of low speed permanent magnet generators for direct-drive wind turbine generator applications has increased significantly. The significant fluctuations in NdFeB magnet prices has encouraged designers to optimise magnet utilisation and to look at alternative magnet materials for wind turbine electrical generators. In this paper an analytical design model is developed for 6 MW offshore direct-drive wind turbine generators using different magnet materials (one with surface mounted NdFeB and another with flux concentrating ferrite magnet). Finite element method models are used to check key dependent variables calculated by the analytical models. The generator designs are optimised using a hybrid optimisation method incorporating a Genetic Algorithm and Pattern Search approaches. This is applied for four different objective functions, the first two which concentrate on maximising rated torque per unit magnet mass or unit of generator active material cost. They are simple and quick to execute but prioritise cost reduction and ignore lower efficiencies leading to lower turbine energy yields and hence poor cost of energy. A third objective function which seeks to minimise the sum of the generator active material cost and the costs of lost revenue over a finite number of operational years. This gives similar results to a fourth objective function which is an explicit turbine cost of energy calculation. The cost of NdFeB magnets affect the cost of energy of the surface mounted generator which tested with different cost €40/kg, €60/kg and €80/kg. The ferrite magnet generator being better when the NdFeB magnet price rises to €80/kg. Conference Paper/Proceeding/Abstract Power Electronics, Machines and Drives (PEMD 2016), 8th IET International Conference on CP684 8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016) Glasgow, UK 978-1-78561-188-9 978-1-78561-189-6 31 12 2016 2016-12-31 10.1049/cp.2016.0300 https://pure.strath.ac.uk/portal/en/publications/optimisation-and-comparison-of-generators-with-different-magnet-materials-for-a-6mw-offshore-direct-drive-wind-turbine(3f3fb023-f987-4402-8729-a67f9fcb4800).html COLLEGE NANME Aerospace Engineering COLLEGE CODE AERO Swansea University 2018-08-06T14:39:08.5158879 2018-05-14T11:26:59.8481052 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering N.A. Bhuiyan 1 A. McDonald 2 Nurul Azim Bhuiyan 0000-0002-1646-2096 3 0040139-15052018120045.pdf bhuiyan2016.pdf 2018-05-15T12:00:45.6500000 Output 440276 application/pdf Accepted Manuscript true 2018-05-15T00:00:00.0000000 true eng
title Optimisation and comparison of generators with different magnet materials for a 6MW offshore direct drive wind turbine
spellingShingle Optimisation and comparison of generators with different magnet materials for a 6MW offshore direct drive wind turbine
Nurul Azim Bhuiyan
title_short Optimisation and comparison of generators with different magnet materials for a 6MW offshore direct drive wind turbine
title_full Optimisation and comparison of generators with different magnet materials for a 6MW offshore direct drive wind turbine
title_fullStr Optimisation and comparison of generators with different magnet materials for a 6MW offshore direct drive wind turbine
title_full_unstemmed Optimisation and comparison of generators with different magnet materials for a 6MW offshore direct drive wind turbine
title_sort Optimisation and comparison of generators with different magnet materials for a 6MW offshore direct drive wind turbine
author_id_str_mv 36b3a440ac5e333da9442e2820d11c63
author_id_fullname_str_mv 36b3a440ac5e333da9442e2820d11c63_***_Nurul Azim Bhuiyan
author Nurul Azim Bhuiyan
author2 N.A. Bhuiyan
A. McDonald
Nurul Azim Bhuiyan
format Conference Paper/Proceeding/Abstract
container_title Power Electronics, Machines and Drives (PEMD 2016), 8th IET International Conference on
container_issue CP684
publishDate 2016
institution Swansea University
isbn 978-1-78561-188-9
978-1-78561-189-6
doi_str_mv 10.1049/cp.2016.0300
publisher 8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016)
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/optimisation-and-comparison-of-generators-with-different-magnet-materials-for-a-6mw-offshore-direct-drive-wind-turbine(3f3fb023-f987-4402-8729-a67f9fcb4800).html
document_store_str 1
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description Abstract:In the past few years interest in the use of low speed permanent magnet generators for direct-drive wind turbine generator applications has increased significantly. The significant fluctuations in NdFeB magnet prices has encouraged designers to optimise magnet utilisation and to look at alternative magnet materials for wind turbine electrical generators. In this paper an analytical design model is developed for 6 MW offshore direct-drive wind turbine generators using different magnet materials (one with surface mounted NdFeB and another with flux concentrating ferrite magnet). Finite element method models are used to check key dependent variables calculated by the analytical models. The generator designs are optimised using a hybrid optimisation method incorporating a Genetic Algorithm and Pattern Search approaches. This is applied for four different objective functions, the first two which concentrate on maximising rated torque per unit magnet mass or unit of generator active material cost. They are simple and quick to execute but prioritise cost reduction and ignore lower efficiencies leading to lower turbine energy yields and hence poor cost of energy. A third objective function which seeks to minimise the sum of the generator active material cost and the costs of lost revenue over a finite number of operational years. This gives similar results to a fourth objective function which is an explicit turbine cost of energy calculation. The cost of NdFeB magnets affect the cost of energy of the surface mounted generator which tested with different cost €40/kg, €60/kg and €80/kg. The ferrite magnet generator being better when the NdFeB magnet price rises to €80/kg.
published_date 2016-12-31T03:51:05Z
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