Robust Droop Control of AC Microgrid Against Nonlinear Characteristic of Inductor

Wenbin Yuan, Yanbo Wang, Dong Liu, Fujin Deng, Zhe Chen

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

3 Citations (Scopus)

Abstract

This paper investigates the effect of nonlinear characteristic of filter inductor on power sharing performance of droop-controlled microgrid, and presents a robust droop control strategy to implement proportional reactive power sharing with immunity to nonlinear characteristic of filter inductor. Considering current-dependent soft-saturation natures of filter inductor, time-variant average model of inductor is first established to reveal the nonlinear inductance characteristic. Then, output impedance model of inverters with consideration of nonlinear inductor is derived to analyze the effect of nonlinear inductor on reactive power sharing characteristic. Furthermore, a robust droop control strategy is proposed to mitigate the effect of nonlinear inductor on reactive power sharing and implement proportional reactive power sharing under different load profiles. Simulation and experimental results show that the proposed droop control strategy is able to perform desirable power sharing with a good capability to reject nonlinear characteristic of filter inductor.
Original languageEnglish
Title of host publicationProceedings of the 10th International Symposium on Power Electronics for Distibuted Generation Systems (PEDG2019)
Number of pages6
PublisherIEEE Press
Publication dateJun 2019
Pages642-647
Article number8807465
ISBN (Print)978-1-7281-2456-8
ISBN (Electronic)978-1-7281-2455-1
DOIs
Publication statusPublished - Jun 2019
Event10th International Symposium on Power Electronics for Distibuted Generation Systems - Xi'an, China
Duration: 3 Jun 20196 Jun 2019
http://www.ieee-pedg.org/2020/page/15/past-conferences/

Conference

Conference10th International Symposium on Power Electronics for Distibuted Generation Systems
CountryChina
CityXi'an
Period03/06/201906/06/2019
Internet address
SeriesIEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
ISSN2329-5767

Keywords

  • Nonlinear inductance model
  • powder core
  • reactive power sharing
  • robust Droop control
  • virtual impedance
  • AC microgrid

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