2026-09-22T01:17:06Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/124469 2024-09-16 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Banerjee, Arijit 2024-05 application/pdf en text Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms The student, Jason Paximadas, accepted the attached license on 2024-05-03 at 13:20. The student, Jason Paximadas, submitted this Thesis for approval on 2024-05-03 at 14:49. This Thesis was approved for publication on 2024-05-03 at 15:46. DSpace SAF Submission Ingestion Package generated from Vireo submission #20775 on 2024-09-16 at 00:38:03 A composite converter architecture for wind energy systems tied to an AC grid Paximadas, Jason Orestis 2024-05-03 Wind Energy Systems Permanent Magnet Synchronous Generator Multi-port Generator Open Winding Trans- Former Grid Connected System As development of new wind turbines aim for higher output power, the doubly-fed induction generator (DFIG) is being replaced by the permanent magnet synchronous generator(PMSG). PMSGs have higher efficiency and torque density which enables compact, direct-drive wind turbines. However, these systems do not have the benefit of allowing power electronics to process partial power as a DFIG would. This thesis analyzes a composite converter architecture for tying PMSG-based wind energy conversion systems to an AC grid that reduces the use of high-frequency switches. The system is a partial power processing converter featuring two processing paths, both of which are fed by a multi-port PMSG. The first path comprises a passive rectifier and line-frequency inverter. The second path utilizes an active rectifier and inverter which employ pulse-width modulation. The two inverters drive either end of an open-winding transformer. The line-frequency path uses reliable, efficient, and inexpensive diodes and switches to process the majority of the power. The high frequency path uses high frequency switches but only processes 10% of the rated power at most. A design framework for minimizing switch rating shows a reduction in high frequency switch-VA rating by 68%. This results in an overall loss reduction ranging between 46.8% and 53% depending on the extracted power. Control and modulation strategies and a maximum power point tracking algorithm are presented. Experimental results obtained from a laboratory prototype validate the performance and the effectiveness of the proposed converter architecture, and its control and modulation strategies. The voltage ripple present in the two dc-links of this system and RMS current stress placed on the dc-link capacitors is quantified. This approach opens up opportunities for integrating ac-collection networks through an efficient, reliable, and cost-effective energy conversion system. Text eng https://hdl.handle.net/2142/124469 Copyright 2024 Jason Paximadas M.S. Thesis Electrical & Computer Engr University of Illinois at Urbana-Champaign Electrical & Computer Eng