Stability Analysis of Grid-Connected VSCs Based on S-parameters and Reflection Coefficient

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Abstract

The grid-connected voltage source converter (VSC) is characterized as a multiple-input multiple-output (MIMO) system in the impedance-based stability analysis, which is also a two-port network. In this paper, the stability analysis methods based on electrical characterize description parameters or scattering parameters (S-parameters) and reflection coefficients are compared. Through the use of reflection coefficients, the single-input single-output (SISO) open-loop gains on each bus can be derived individually. The stability can then be analyzed using the classical Nyquist criterion and the relative stability can be defined, as well as the critical bus can be further identified. Moreover, "start-up" resonance frequency can be predicted in the stability analysis. Simulations and the experimental result validate the theoretical derivations.
Original languageEnglish
Title of host publicationProceedings of 2019 IEEE Energy Conversion Congress and Exposition (ECCE)
Number of pages8
Place of PublicationUSA
PublisherIEEE Press
Publication dateSep 2019
Pages5171-5178
Article number8913265
ISBN (Print)978-1-7281-0396-9
ISBN (Electronic)978-1-7281-0395-2
DOIs
Publication statusPublished - Sep 2019
Event2019 IEEE Energy Conversion Congress and Exposition (ECCE) - Baltimore, United States
Duration: 29 Sep 20193 Oct 2019

Conference

Conference2019 IEEE Energy Conversion Congress and Exposition (ECCE)
CountryUnited States
City Baltimore
Period29/09/201903/10/2019
SeriesIEEE Energy Conversion Congress and Exposition
ISSN2329-3721

Keywords

  • Reflection coefficient
  • Scattering parameters
  • Stability analysis
  • Two-port network
  • Voltage source converter

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