Implementations of seamless transfer and active islanding detections for microgrid applications

Ming Chuan Lin, Lin Yu Lu, Chia Chi Chu

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

9 Scopus citations

Abstract

This paper describes experimental implementations of seamless transfer between grid-connected mode and islanded mode of a three-phase utility-interactive voltage source converter (VSC) for microgrid applications. First, a smooth moving from grid-connected mode to islanded mode is accomplished by the islanding detection and the smooth transition. The islanding detection is achieved by the negative-sequence current injection method and quantitative analysis confirms the feasibility of this method. In experimental verifications, this unbalanced current injection is implemented by the decoupled double synchronous reference frame (DDSRF) current controller. In the second phase, a phase compensation scheme of the VSC is studied for grid re-synchronization of the isolated VSC. The operating frequency of the VSC is adjusted according to the angle difference between VSC and utility grid. PSCAD/EMTDC simulator is used to verify theoretical results of both phases. A 2kVA, 220 VAC, 60 Hz laboratory-scaled VSC is also constructed for validating the proposed control scheme. Experimental results agree well with simulation waveforms.

Original languageEnglish
Title of host publication2013 IEEE International Symposium on Industrial Electronics, ISIE 2013
DOIs
StatePublished - 2013
Externally publishedYes
Event2013 IEEE 22nd International Symposium on Industrial Electronics, ISIE 2013 - Taipei, Taiwan
Duration: 28 05 201331 05 2013

Publication series

NameIEEE International Symposium on Industrial Electronics

Conference

Conference2013 IEEE 22nd International Symposium on Industrial Electronics, ISIE 2013
Country/TerritoryTaiwan
CityTaipei
Period28/05/1331/05/13

Keywords

  • DDSRF
  • Grid Re-synchronization
  • Grid-Connected Mode
  • Islanded Mode
  • Microgrid
  • Negative Sequence Current Injections
  • Seamless Transfer
  • VSC

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