Document Type

Dissertation - Open Access

Award Date

2026

Degree Name

Doctor of Philosophy (PhD)

Department / School

Electrical Engineering and Computer Science

First Advisor

Junjian Qi

Abstract

Microgrids serve as a small-scale power grid for utilizing renewable energy to enhance energy reliability, sustainability, and resilience. As an autonomous system, an islanded microgrid can disconnect from the utility grid and operate independently by maintaining system voltage and frequency. However, this new feature introduces coordination problems among distributed generators (DGs), such as 1) how to make sure the voltage profile and current sharing in DC microgrid with different types of converters; 2) how to reduce the impact of cyberattack when the system coordination is performed based on communication, and 3) how to calculate the steady state under a droop coordination policy. To deal with these problems, this research proposed methods for each problem: 1) an optimal distributed control is proposed to ensure the proper voltage profile and current sharing among converters; 2) virtual agents as fake targets are involved in the microgrid consensus based control to reduce the probability that communication agents are targeted and 3) a fast steady-state analysis method is proposed to characterize the system’s steady state under droop control. In addition, this research develops two testbeds for control evaluation. These testbeds replicate real-world microgrid systems by employing actual inverters, controllers, and communication to closely mimic real-world conditions.

Publisher

South Dakota State University

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Rights Statement

In Copyright