Use this URL to cite or link to this record in EThOS:
Title: On the analysis and modelling of the effects of high frequency harmonics on classical synchronous generators
Author: Quadri, Syed Quadir Hussain
ISNI:       0000 0004 9354 9261
Awarding Body: University of Nottingham
Current Institution: University of Nottingham
Date of Award: 2020
Availability of Full Text:
Access from EThOS:
Full text unavailable from EThOS. Restricted access.
Access from Institution:
High frequency currents are starting to penetrate in power systems due to the rapidly increasing use of high switching frequency power electronic components. While the presence of these power electronic devices is increasing rapidly, the magnitudes of the high frequency currents generated by them are actually very low. Thus, today, research investigating their effects on the components in the power networks is very limited. In anticipation of this emerging high frequency pollution in the networks, this research focuses on modelling the effects of this phenomenon on the armature windings of classical synchronous generators, which today still represent the major source of power generation across the world. The thesis presents work on developing improved modelling tools for performance characterisation of classical wound field, salient pole synchronous generators considering the emerging high frequency pollution. It first presents a fast and accurate synchronous generator simulation model that considers space harmonics and magnetic saturation by proposing optimised lookup tables for flux linkages that make the model development process more efficient. The model is validated against experimental results and is shown to result in significant benefits and flexibility over the more common FE modelling. The thesis then proposes an improved subdomain modelling technique for accurate high frequency copper loss calculation at frequencies as high as 10kHz for round conductors, which showed a drastic improvement in the accuracy compared to the conventional subdomain model. This technique was validated experimentally and then finally both the validated modelling tools were integrated to present a comprehensive SG model that simulated the overall effects of harmonics on voltage, current, torque and high-frequency copper loss waveforms.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: TK Electrical engineering. Electronics Nuclear engineering