ECE 590I POWER & ENERGY SYSTEMS SEMINAR
WHEN: Monday, October 31, 2022
WHERE: 4070 ECEB, 3:00 – 3:50 p.m., ZOOM Meeting ID: 88149971008; Password: seminar
SPEAKER: T.G. Roberts, Department of Electrical and Computer Engineering, UIUC
TITLE: "Secondary Frequency and Voltage Control in Microgrids with dVOC Inverters"
ABSTRACT: The study of fully inverter-based microgrids has become increasingly important as more added generation in the US uses renewable resources. Conventional microgrid control employs a three-tiered control scheme that consists of primary, secondary and tertiary control to regulate voltage and frequency levels. The conventional control scheme also employs droop-controlled inverters for their grid-forming nature. In our proposed control scheme, we apply the conventional three-tiered control scheme to a dispatchable, virtual-oscillator-controlled (dVOC) inverter, which has more advantageous properties than a droop-controlled inverter. Decentralized, dVOC inverter-based primary control is first used to arrest frequency and voltage changes in the system. Then, a centralized integral controller returns the frequency to nominal and distributed integral controllers return the voltage to its nominal level. This presentation illustrates the proof of concept for a multi-level control scheme in voltage and frequency regulation in a dVOC inverter-controlled GFM.
