A new virtual-flux-vector based droop control strategy for parallel connected inverters in microgrids

Jiefeng Hu, Jianguo Zhu, Yanqing Qu, Josep M. Guerrero

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

4 Citations (Scopus)

Abstract

Voltage and frequency droop method is commonly used in microgrids to achieve proper autonomous power sharing without control wire interconnections. This paper proposes a new control strategy for parallel connected inverters in microgrid applications by drooping the flux instead of the inverter output voltage. Firstly, the relation between the inverter flux and the active and reactive powers is mathematically obtained. Secondly, a novel flux droop method is then developed in order to regulate active and reactive powers by drooping the flux amplitude and the phase angle, respectively. In addition, a small-signal model is developed in order to design the main control parameters and study the system dynamics and stability. The proposed control scheme includes a direct flux control (DFC) algorithm, which avoids the use of PI controllers and PWM modulators. The obtained results shows that the proposed flux droop strategy can achieve active and reactive power sharing with much lower frequency deviation and better transient performance than the conventional voltage droop method, thus highlighting the potential use in microgrid applications.
Original languageEnglish
Title of host publication2013 IEEE ECCE Asia Downunder - 5th IEEE Annual International Energy Conversion Congress and Exhibition, IEEE ECCE Asia 2013
Pages585-590
Number of pages6
DOIs
Publication statusPublished - 16 Sep 2013
Externally publishedYes
Event2013 IEEE ECCE Asia Downunder - 5th IEEE Annual International Energy Conversion Congress and Exhibition, IEEE ECCE Asia 2013 - Melbourne, VIC, Australia
Duration: 3 Jun 20136 Jun 2013

Conference

Conference2013 IEEE ECCE Asia Downunder - 5th IEEE Annual International Energy Conversion Congress and Exhibition, IEEE ECCE Asia 2013
CountryAustralia
CityMelbourne, VIC
Period3/06/136/06/13

Keywords

  • active and reactive power sharing
  • direct flux control
  • distributed generation
  • flux droop control
  • Microgrids

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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