Optimization of offshore direct drive wind turbine generators with consideration of permanent magnet grade and temperature

Bhuiyan, Nurul Azim and McDonald, Alasdair (2019) Optimization of offshore direct drive wind turbine generators with consideration of permanent magnet grade and temperature. IEEE Transactions on Energy Conversion, 34 (2). pp. 1105-1114. ISSN 0885-8969 (https://doi.org/10.1109/TEC.2018.2879442)

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Abstract

In this paper, the main objective is to optimize permanent magnet synchronous generators for offshore direct drive wind turbine, examining the best choice of magnet grades, BHmax and working temperature. A surface-mounted Nd-Fe-B generator is designed electromagnetically and structurally and optimized for different rated powers of 6, 8 and 10 MW. The results show that the cost of energy decreases as the wind turbine’s rated power increases. Further optimizations were carried out using different neodymium magnet grades and it was found that the higher magnet grades produce a lower cost of energy. In addition, steps were taken to estimate the effect of magnet temperature. A detailed thermal model is used to calculate the cooling airflow requirements to bring the magnet operating temperature from 120°C to 80°C. Allowing the use of cheaper temperature grades of magnets, the additional cooling reduces winding losses and improves the effective BHmax of the magnets.

  • Item type:Article
    ID code:65934
    Dates:
    Date
    Event
    30 June 2019
    Published
    2 November 2018
    Published Online
    10 October 2018
    Accepted
    Notes:© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:01 Nov 2018 09:28
    Last modified:14 Apr 2024 00:47
    URI:https://strathprints.strath.ac.uk/id/eprint/65934
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