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

Williams, Ethan

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

Description

Title

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

Author(s)

Williams, Ethan

Issue Date

2024-05-02

Director of Research (if dissertation) or Advisor (if thesis)

Dominguez-Garcia, Alejandro D

Department of Study

Electrical & Computer Eng

Discipline

Electrical & Computer Engr

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• Modeling
• synchronous generators
• grid-forming inverters
• microgrids
• control
• simulator
• MATLAB/Simulink

Abstract

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.

Graduation Semester

2024-05

Type of Resource

Thesis

Copyright and License Information

Copyright 2024 Ethan Williams

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