Modeling, simulation, and control design of electro-mechanical dynamics in heterogeneous power systems

In this thesis, a general modeling framework to study power systems with synchronous generators and grid forming inverters with droop control, virtual synchronous machine control, and dispatchable virtual oscillator control is developed. To mitigate model complexity and facilitate analytical understanding, this framework employs reduced-order models that are applicable for electro-mechanical phenomena occurring on time-scales ranging from tenths of seconds to minutes. Along with developing the open-loop model for this framework, different types of closed-loop control are detailed, including an LQR method that can provide augmented primary control and secondary control. Further, a MATLAB/Simulink tool based on this modeling framework is described, a tool that allows for fast development and flexible simulation of heterogeneous power system models. Finally, the tool’s functionality is demonstrated with various numerical experiments. Its ability to simulate open-loop power systems is tested with a custom 4-bus test case and modified IEEE 14-bus and 57-bus test cases. In addition, an approximation technique to decrease computation time while maintaining sufficient accuracy is tested. Lastly, the tool’s ability to simulate closed-loop control is demonstrated on a custom 2-bus test case, comparing conventional secondary control techniques to the proposed LQR method.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Electrical & Computer Engr

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2024

Author dc:creator

• Williams, Ethan

Contributors dc:contributor

• Dominguez-Garcia, Alejandro D

• Modeling
• Synchronous Generators
• Grid-forming Inverters
• Microgrids
• Control
• Simulator
• Matlab/simulink

Statement dc:rights

• Copyright 2024 Ethan Williams

Language dc:language

eng, en

Handle dc:identifier

https://hdl.handle.net/2142/124437

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/124437