Angular Domain Control Design for Single-Phase Inverter to Enhance Distribution Grid Power Quality
Sergio A. Dorado-Rojas, Felipe Galarza-Jiménez, Rajarshi Roychowdhury, Balaji Guddanti, and Zongjie Wang
Acknowledgements
The authors would like to thank Dr. Germán A. Ramos for his insight and supervision in the early stages of this work.
bib
@inproceedings{dorado-rojas2022,
title = {Angular {{Domain Control Design}} for {{Single-Phase Inverter}} to {{Enhance Distribution Grid Power Quality}}},
booktitle = {2022 {{IEEE Industry Applications Society Annual Meeting}} ({{IAS}})},
author = {{Dorado-Rojas}, Sergio A. and {Galarza-Jim{\'e}nez}, Felipe and Roychowdhury, Rajarshi and Guddanti, Balaji and Wang, Zongjie},
year = 2022,
month = oct,
issn = {2576-702X},
doi = {10.1109/IAS54023.2022.9939748},
urldate = {2025-09-02}
}Abstract
The United States has seen an enormous influx of single-phase behind-the-meter installations in the last decade. With the latest Federal Energy Regulatory Commission (FERC) order 2222, these behind-the-meter installations can be aggregated and participate in the power markets by providing ancillary services. Hence, controlling smart inverters to maintain power quality in the distribution grid remains challenging. With multiple smaller units forming an aggregation and responding to market signals, nearby standalone single-phase behind-the-meter smart inverters would need better controls to react to frequency excursions. This paper presents an Angular Space Repetitive Control (ASRC)-based Active Power Filter (APF) for a single-phase smart inverter used predominantly in behind-the-meter installations. The proposed control guarantees power quality during large-scale frequency excursions, well above and beyond the stipulated frequency range (59.5-61 Hz) strictly enforced throughout North America. The proposed controller is modeled in Simulink, and the response to input frequency deviations shows a current Total Harmonic Distortion (THD) of less than 3% even under extreme frequency excursions.