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Distributed Secondary Control of Grid-Forming Inverters and AC Microgrids: Impacts of Voltage Feedback Choices

  • Ganesh Marasini*
  • , Zhihua Qu
  • , Soumyadeep Nag
  • , Ying Xu
  • *Corresponding author for this work
  • University of Central Florida

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, the operational choices in distributed secondary control are examined, and their impacts on grid-forming (GFM) inverters and grid operation are investigated. In particular, the effects of feedback voltage choices, either average voltage feedback (AVF) or terminal voltage feedback (TVF), are studied with respect to reactive power sharing, voltage regulation, and grid-forming operation during black start. The secondary control used is a subgradient-based distributed cooperative control, and it provides the voltage, angle, and frequency references to the GFM inverters and their primary tracking controls. The overall control architecture employs multi-rate sampling such that the secondary control is slower than the primary control. The operational choices and their control performance are illustrated using a four-GFM-inverter microgrid in MATLAB/SIMULINK. The results show the effectiveness of the secondary controller, and several conclusions are drawn on the voltage feedback signals as the design choices.

Original languageEnglish
Title of host publication2022 North American Power Symposium, NAPS 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665499217
DOIs
StatePublished - 2022
Externally publishedYes
Event2022 North American Power Symposium, NAPS 2022 - Salt Lake City, United States
Duration: 9 Oct 202211 Oct 2022

Publication series

Name2022 North American Power Symposium, NAPS 2022

Conference

Conference2022 North American Power Symposium, NAPS 2022
Country/TerritoryUnited States
CitySalt Lake City
Period9/10/2211/10/22

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 7 - Affordable and Clean Energy
    SDG 7 Affordable and Clean Energy

Keywords

  • Cooperative Control
  • Grid Forming Inverters
  • Microgrid
  • Secondary Control

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