An analysis method for harmonic resonance and stability of multi-paralleled LCL-filtered inverters

Minghui Lu, Xiongfei Wang, Frede Blaabjerg, Poh Chiang Loh

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

37 Citations (Scopus)

Abstract

Paralleled grid-connected inverters with LCL-filters are coupled through the non-negligible grid impedance. However, the coupling effects among inverters and grid are usually ignored during the design, which may lead to unexpected system resonance and even instability. This paper thus investigates the resonance characteristic and stability analysis in multi-paralleled grid-connected inverters with LCL-filters. An intuitive analytical method based on equivalent grid impedance has been proposed. The analysis clearly describes the open loop resonance characteristic and provides a relatively easy method to define the stable region of multi-inverters system. Experimental results are provided for verifying the theoretical analysis.
Original languageEnglish
Title of host publicationProceedings of the IEEE 6th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2015
Number of pages6
PublisherIEEE Press
Publication dateJun 2015
Pages1-6
DOIs
Publication statusPublished - Jun 2015
EventIEEE 6th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2015 - Pullman Aachen Quellenhof hotel, Aachen, Germany
Duration: 22 Sept 201525 Sept 2015

Conference

ConferenceIEEE 6th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2015
LocationPullman Aachen Quellenhof hotel
Country/TerritoryGermany
CityAachen
Period22/09/201525/09/2015

Keywords

  • Paralleled voltage source converters
  • Resonance Analysis
  • Stability issue

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