Generalized coupling resonance modeling, analysis, and active damping of multi-parallel inverters in microgrid operating in grid-connected mode

Zhiyong Chen, Yandong Chen, Josep M. Guerrero, Huimin Kuang, Yuan Huang, Leming Zhou, An Luo

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31 Citations (Scopus)
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Abstract

This paper firstly presents an equivalent coupling circuit modeling of multi-parallel inverters in microgrid operating in grid-connected mode. By using the model, the coupling resonance phenomena are explicitly investigated through the mathematical approach, and the intrinsic and extrinsic resonances exist widely in microgrid. Considering the inverter own reference current, other inverters reference current, and grid harmonic voltage, the distributions of resonance peaks with the growth in the number of inverters are obtained. Then, an active damping control parameter design method is proposed to attenuate coupling resonance, and the most salient feature is that the optimal range of the damping parameter can be easily located through an initiatively graphic method. Finally, simulations and experiments verify the validity of the proposed modeling and method.
Original languageEnglish
JournalJournal of Modern Power Systems and Clean Energy
Volume4
Issue number1
Pages (from-to) 63-75
Number of pages13
ISSN2196-5625
DOIs
Publication statusPublished - Jan 2016

Keywords

  • Microgrid
  • Coupling resonance
  • Active damping

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