Microgrid Reactive and Harmonic Power Sharing Using Enhanced Virtual Impedance

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

11 Citations (Scopus)

Abstract

To address the load sharing problem in islanding microgrids, this paper proposes an improved approach which regulates the distributed generation (DG) unit interfacing virtual impedance at fundamental and selected harmonic frequencies. In contrast to the conventional virtual impedance control where only a line current feed-forward term is added to the DG voltage reference, the proposed virtual impedances at fundamental and harmonic frequencies are realized using DG line current and point of common coupling (PCC) voltage feed-forward terms, respectively. With this modification, the mismatched DG feeder impedances can be properly compensated, resulting in accurate reactive and harmonic power sharing at the same time. In addition, this paper shows that the microgrid PCC harmonic voltages can be mitigated by reducing the magnitude of DG unit equivalent harmonic impedance. Finally, an improved proportional plus resonant voltage controller is developed to ensure accurate power sharing and PCC harmonic voltage compensation without using any
fundamental/harmonic component detections.
Original languageEnglish
Title of host publication28th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2013
Number of pages6
PublisherIEEE Press
Publication date2013
Pages447-452
ISBN (Print)978-1-4673-4354-1
ISBN (Electronic)978-1-4673-4353-4
DOIs
Publication statusPublished - 2013
EventIEEE Applied Power Electronics Conference and Exposition, APEC 2013 - Long Beach, CA, United States
Duration: 17 Mar 201321 Mar 2013

Conference

ConferenceIEEE Applied Power Electronics Conference and Exposition, APEC 2013
Country/TerritoryUnited States
CityLong Beach, CA
Period17/03/201321/03/2013
SeriesI E E E Applied Power Electronics Conference and Exposition. Conference Proceedings
ISSN1048-2334

Keywords

  • harmonic detection, droop control, virtual impedance, and low-bandwidth communication.

Fingerprint

Dive into the research topics of 'Microgrid Reactive and Harmonic Power Sharing Using Enhanced Virtual Impedance'. Together they form a unique fingerprint.

Cite this