Feasibility study of 5MW superconducting wind turbine generator

Abrahamsen, Asger Bech; Jensen, Bogi Bech; Seiler, E; Mijatović, Nenad; Rodriguez-Zermeno, Victor M.; Andersen, N.H.; Ostergard, J.

doi:10.1016/j.physc.2011.05.217

Cited by 55 publications

(17 citation statements)

References 5 publications

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“…In order to make a meaningful comparison, the rotational speed as well as the number of poles were kept the same for both generator designs. In [22] the main design requirements of a 5 MW superconducting generator are discussed. To be economically as well as technically viable the target weight of the active mass of the generator was suggested to be below 40 tons to be competitive against permanent magnet technology.…”

Section: Design Of the 5 Mw Modulementioning

confidence: 99%

Modular and stackable power generators for efficient renewable power generation

Kails

Mueller

2019

IET Renewable Power Generation

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Stackable power generators enable very compact electric machines with high power density. How to identify an effective way of stacking is necessary and requires new knowledge for future guidance. In this paper, both possibilities of stacking modules concentrically and axially are explored and compared. An axial flux generator based on our existing double claw pole design is used as a case study. The claw pole generator, which is modular and stackable, significantly benefits on-site installation due to its flexible small modules that can be easily transported. This is particularly important to the installation of offshore wind turbines. Superconducting field windings are applied instead of copper in such power generators, which greatly increases their power density. In order to further increase their power density and reduce mass, we improved the modularity of 5 MW generators and stacked them in both ways. Results show that the power density versus mass as well as volume can be improved through stacking the modules both concentrically and axially, while the former approach is much more effective. Stacking two modules of 5 MW concentrically results in a 12.1 MW power generator with a more compact structure and higher power density than the original 10 MW generator. Poles 88 Stator coils per stator 66 Power output 10 MW Line voltage 3.3 kV Rotational speed 10 rpm Power density 54.28 W/kg Efficiency 94.50 %

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Section: Design Of the 5 Mw Modulementioning

confidence: 99%

Modular and stackable power generators for efficient renewable power generation

Kails

Mueller

2019

IET Renewable Power Generation

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“…This is however not as easily achieved in a superconducting machine where the mmf is supplied by a superconducting electromagnet. If the number of poles in a superconducting machine is increased, the amount of superconducting wire is also increased and hence the price of the machine is increased [18]. This price increase can be very significant because the superconducting wire is currently very expensive.…”

Section: Challengesmentioning

confidence: 99%

Development of superconducting wind turbine generators

Jensen

Mijatović

Abrahamsen

2013

Journal of Renewable and Sustainable Energy

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In this paper the commercial activities in the field of superconducting machines, particularly superconducting wind turbine generators, are reviewed and presented. Superconducting generators have the potential to provide a compact and light weight drive train at high torques and slow rotational speeds, because high magnetic fields can be produced by coils with very little loss.Three different superconducting wind turbine generator topologies have been proposed by three different companies. One is based on low temperature superconductors (LTS); one is based on high temperature superconductors (HTS); and one is a fully superconducting generator based on MgB 2 . It is concluded that there is large commercial interest in superconducting machines, with an increasing patenting activity.Such generators are however not without their challenges. The superconductors have to be cooled down to somewhere between 4K and 50K, depending on what type of superconductor is employed, which poses a significant challenge both from a construction and operation point of view. The high temperature superconductors can facilitate a higher operation temperature and simplified cooling, but the current price and production volumes prohibit a large scale impact on the wind sector. The low temperature superconductors are readily available, but will need more sophisticated cooling.Eventually the CoE from superconducting wind turbines, with particular emphasis on reliability, will determine if they become feasible or not and for such investigations large-scale demonstrations will be needed.

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“…5). More details about the coils can be found in [7]. Completed coils are presented in the Table. 2.…”

Section: Hts Field Windingmentioning

confidence: 99%

High temperature superconductor machine prototype

Mijatović

Jensen

Traholt

et al. 2011

2011 International Conference on Electrical Machines and Systems

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A versatile testing platform for a High Temperature Superconductor (HTS) machine has been constructed. The stationary HTS field winding can carry up to 10 coils and it is operated at a temperature of 77K. The rotating armature is at room temperature.Test results and performance for the HTS field winding comprising four coils wound with two types of HTS tapes are shown and discussed. The field winding produces up to 0.62T in the 10mm air gap which constitutes 78% of the armature design value. Recommendations for the field winding operation are proposed and verified, which resulted in an increase of available magneto-motive force of the field winding up to 25%.

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Feasibility study of 5MW superconducting wind turbine generator

Cited by 55 publications

References 5 publications

Modular and stackable power generators for efficient renewable power generation

Modular and stackable power generators for efficient renewable power generation

Development of superconducting wind turbine generators

High temperature superconductor machine prototype

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