Design Challenges and Benefits of HTS Synchronous Machines

Klaus, G.; Wilke, Markus; Frauenhofer, J.; Nick, W.; Neumüller, H.‐W.

doi:10.1109/pes.2007.385756

Cited by 50 publications

(27 citation statements)

References 8 publications

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“…In this respect, the conductors with a high surface-to-volume ratio can lead to a high cooling . Two different rotor arrangements (Klaus et al, 2007) efficiency. It is easily understood that cooling efficiency is also dependent on the thermal insulation of HTS.…”

Section: Cooling Arrangementsmentioning

confidence: 99%

High-Temperature Superconducting Wind Turbine Generators

Cao¹

2011

Wind Turbines

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Section: Cooling Arrangementsmentioning

confidence: 99%

High-Temperature Superconducting Wind Turbine Generators

Cao¹

2011

Wind Turbines

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“…The common characteristic for all HTS machines, and one of their main benefits, is the power density which could be significantly larger than in conventional machines [4].…”

Section: A Hts Machine Designmentioning

confidence: 99%

“…The two main designs, which the HTS synchronous machines are gravitating towards, are salient pole machines with conventional armature windings and non-salient multi-pole machines with air-gap armature windings [4], [5]. Both designs are shown and described in the Fig.…”

Section: A Hts Machine Designmentioning

confidence: 99%

Coil Optimization for High Temperature Superconductor Machines

Mijatović

Jensen

Abrahamsen

et al. 2011

IEEE Trans. Appl. Supercond.

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Abstract-This paper presents topology optimization of HTS racetrack coils for large HTS synchronous machines. The topology optimization is used to acquire optimal coil designs for the excitation system of 3 T HTS machines. Several tapes are evaluated and the optimization results are discussed.The optimization algorithm is formulated to minimize the cost for the coils wound with one type of HTS as well as multiple HTS types. It could also be used to minimize other parameters, e.g. space required for the coils. The results are inherently highly dependent on the HTS properties, which at 20 K seem to be in favor of the 1 G tape. The maximal HTS savings achieved allowing multiple current supplies in the excitation system are investigated and estimated to be in the range of 50% for highly nonlinear J-B dependence HTS tapes.

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“…An analytical model and a finite element (FE) model were introduced in [8] and [11], respectively, to simulate short circuits in HTS machines. [12] reported influences of a series of generator parameters on stator currents and fault torques, assuming a constant rotating speed.…”

Section: Introductionmentioning

confidence: 99%

Short Circuits of a 10-MW High-Temperature Superconducting Wind Turbine Generator

Song

Liu

Polinder

et al. 2017

IEEE Trans. Appl. Supercond.

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Abstract-Direct drive high temperature superconducting (HTS) wind turbine generators have been proposed to tackle challenges for ever increasing wind turbine ratings. Due to smaller reactances in HTS generators, higher fault currents and larger transient torques could occur if sudden short circuits happen at generator terminals. In this paper, a finite element model that couples magnetic fields and the generator's equivalent circuits is developed to simulate short circuit faults. Afterwards, the model is used to study the transient performance of a 10 MW HTS wind turbine generator under four different short circuits, i.e., three-phase, phase-phase clear of earth, phase-phase-earth, and phase-earth. The stator current, fault torque, and field current under each short circuit scenario are examined. Also included are the forces experienced by the field winding under short circuits. The results show that the short circuits pose great challenges to the generator, and careful consideration should be given to protect the generator. The results presented in this paper would be beneficial to the design, operation and protection of an HTS wind turbine generator.

show abstract

Design Challenges and Benefits of HTS Synchronous Machines

Cited by 50 publications

References 8 publications

High-Temperature Superconducting Wind Turbine Generators

High-Temperature Superconducting Wind Turbine Generators

Coil Optimization for High Temperature Superconductor Machines

Short Circuits of a 10-MW High-Temperature Superconducting Wind Turbine Generator

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