Graduation Semester and Year
Winter 2025
Language
English
Document Type
Dissertation
Degree Name
Doctor of Philosophy in Electrical Engineering
Department
Electrical Engineering
First Advisor
David Wetz
Second Advisor
Alexander Johnston
Abstract
Microgrid power configurations have become increasingly prevalent in recent power systems due to the rise of power electronic energy generation, energy storage, and the many diverse electrical demands. Microgrids offer numerous advantages over traditional power electronic networks, which rely on large rotating generators to supply power over extensive distances to multiple users. Remote power grids are particularly beneficial for smaller networks that may be isolated or have unique power requirements, often incorporating energy storage to enhance operational flexibility. Advances in power electronics, such as medium voltage DC distribution, are enhancing the reliability, redundancy, and integration capabilities of isolated microgrids.
To enable delivery of varying power demands on an isolated bus, crucial for reliable power generation in this configuration, dual wound electric machines are a plausible solution. While dual wound polyphase machine research interest is resurging, designing them for DC microgrids requires a deeper understanding of their unique operational characteristics.
Simulation and modeling offer theoretical insights, but real-world validation through hardware-in-the-loop testing provides a more robust approach, especially at medium voltage and power levels where data is scarce. This approach involves developing real-time simulator models for a dual wound polyphase machine that accurately capture imbalances and magnetic characteristics, crucial for emulation and validation against hardware tests. The effectiveness of this method is demonstrated across various operational scenarios, confirming its applicability from low to medium voltage systems. Model validation and characterization for a dual wound poly-phase machine, in addition to, design simulation of power conditioning components and transient impacts of utilizing energy storage devices will be covered in the following work.
Keywords
Dual-wound, Polyphase, Generator, VFD, Modeling, MATLAB/Simulink
Disciplines
Controls and Control Theory | Electrical and Electronics | Electromagnetics and Photonics | Power and Energy
License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Lockhart, Nathan, "Characterization and Modeling of Polyphase Machines and Power Conditioning Components" (2025). Electrical Engineering Dissertations. 414.
https://mavmatrix.uta.edu/electricaleng_dissertations/414
Included in
Controls and Control Theory Commons, Electrical and Electronics Commons, Electromagnetics and Photonics Commons, Power and Energy Commons
Comments
I would like to sincerely thank the Office of Naval Research (ONR) for their financial support through grant N00174-22-1-0023 providing invaluable resources during the development of this work.