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.
Highlights
The success of an electromechanical design modelling is in its ability to predict the performance of the system accurately
finite element analysis (FEA)-based simulations on a flux pump-integrated 10 kW high-temperature superconducting (HTS) generator are conducted to analyse the harmonic contents under different operating conditions
We have reported the no-load harmonic performance of a 10 kW HTS generator with two different stator yoke materials [25]
Summary
The success of an electromechanical design modelling is in its ability to predict the performance of the system accurately. FEA-based simulations on a flux pump-integrated 10 kW high-temperature superconducting (HTS) generator are conducted to analyse the harmonic contents under different operating conditions. Earlier reports have discussed the potential of flux pumps to replace the DC excitation of field windings [8,9] Another substantial contributing factor in harmonic performance is the stator yoke material. A study outlining the harmonic distortion effects of the use of an air-cored stator or a non-ferromagnetic stator for a non-conventional machine design with flux pump excitation, as presented in this paper, is first of its kind. We have reported the no-load harmonic performance of a 10 kW HTS generator with two different stator yoke materials [25]. The effects of the stator design on the harmonic performance will be reported, and the best-suited design configuration for improved THD performance will be established
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