Distributed Predictive Virtual Capacitance Control for Accurate Reactive Power Sharing in Islanded Microgrids

Oluleke Babayomi, Yu Li, Zhenbin Zhang, Jose Rodriguez

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

1 Citation (Scopus)

Abstract

Distributed renewable energy generation is one of the notable features of the emerging smart grid. These distributed generators (DGs), which require power electronic converter interfaces, are modularly connected to microgrids-which are the "building blocks"of the smart grid. However, one recurring challenge with AC microgrids is inaccurate reactive power sharing among voltage source converters (VSCs) that make up the DGs. This happens whenever the impedances of feeder lines that connect the different DGs to the microgrid bus are unequal. The state-of-The-Art methods to these problems have two limitations: 1) loss of voltage regulation as equal/proportional reactive power sharing is achieved, and 2) use of high-bandwidth communication for wide-Area applications. Therefore, in this paper, we address these problems as follows: first we introduce a novel predictive virtual capacitance control scheme that can both achieve more accurate reactive power sharing and also improve voltage regulation in VSCs, and second we achieve reactive power sharing among multiple VSCs with an improved consensus-based distributed control; this requires low-bandwidth is robust to communication interference, and provides plug-And-play capability. The effectiveness of these new methods are verified experimentally with PLECS RT-Box hardware-in-The-loop equipment on a microgrid system with four connected VSCs.

Original languageEnglish
Title of host publication6th IEEE International Conference on Predictive Control of Electrical Drives and Power Electronics, PRECEDE 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages851-856
Number of pages6
ISBN (Electronic)9781665425575
DOIs
Publication statusPublished - 2021
Event6th IEEE International Conference on Predictive Control of Electrical Drives and Power Electronics, PRECEDE 2021 - Jinan, China
Duration: 20 Nov 202122 Nov 2021

Publication series

Name6th IEEE International Conference on Predictive Control of Electrical Drives and Power Electronics, PRECEDE 2021

Conference

Conference6th IEEE International Conference on Predictive Control of Electrical Drives and Power Electronics, PRECEDE 2021
Country/TerritoryChina
CityJinan
Period20/11/2122/11/21

Keywords

  • AC microgrid
  • model predictive control
  • power converter
  • power sharing
  • virtual capacitor

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Control and Optimization
  • Energy Engineering and Power Technology
  • Control and Systems Engineering

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