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Energies 2017, 10(9), 1344; https://doi.org/10.3390/en10091344

Design Improvisation for Reduced Harmonic Distortion in a Flux Pump-Integrated HTS Generator

1
Department of Electrical and Electronic Engineering, Auckland University of Technology, Auckland 1010, New Zealand
2
Robinson Research Institute, Victoria University of Wellington, Wellington 5010, New Zealand
*
Author to whom correspondence should be addressed.
Received: 29 May 2017 / Revised: 19 July 2017 / Accepted: 22 August 2017 / Published: 6 September 2017
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

This paper presents a design improvisation of a flux pump-integrated 10 kW high-temperature superconducting (HTS) proof of concept generator for reduced harmonic distortion. To carry out the design improvisation, a finite element analysis (FEA) model of the 10 kW HTS generator is developed, and time-stepped magnetic transient simulations are conducted on the 2D model. The effects of stator yoke material, winding pitch factors, and load configurations on total harmonic distortion (THD) are investigated. The results showed that fibre-reinforced polymer (FRP) epoxy (G10) can be used as the stator yoke material to effectively avoid the hysteresis and eddy current losses. In addition, the study results show that for the non-conventional design of the machine, a winding pitch of 2/3 and the armature-load configuration of Star-Delta gives THD values within the standard limit defined by IEEE Standard 519-2014. The THD values indicate that the machine design configuration is suitable for the development of machines for both stand-alone and grid-connected operations, according to IEEE STD 519-2014. View Full-Text
Keywords: current leads; finite element method (FEM); flux pump; HTS; harmonics; yttrium barium copper oxide (YBCO) current leads; finite element method (FEM); flux pump; HTS; harmonics; yttrium barium copper oxide (YBCO)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Kulkarni, R.; Prasad, K.; Tjing Lie, T.; Badcock, R.A.; Bumby, C.W.; Sung, H.-J. Design Improvisation for Reduced Harmonic Distortion in a Flux Pump-Integrated HTS Generator. Energies 2017, 10, 1344.

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