Comparison of Three Small-Signal Stability Analysis Methods for Grid-Following Inverter

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Abstract

Conventional vector current control (VCC) based grid-following inverters suffer from stability issues under weak grid, which attracts a lot of attention in recent years. Small-signal linearized model is an effective tool to analyze the stability of such nonlinear systems. In this paper, three small-signal stability analysis methods are compared, which are the state-space method, impedance analysis method, and equivalent single-input single-output (SISO) stability analysis method. These three methods are based on the same primitive system but with different input-output relations. Through strict analysis, it is found that the three methods basically predict the same stability boundary. Finally, the advantages and disadvantages of three methods are summarized and compared.
Original languageEnglish
Title of host publication2021 International Aegean Conference on Electrical Machines and Power Electronics (ACEMP) & 2021 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)
Number of pages8
Publication date2021
Pages34-41
ISBN (Print)978-1-6654-4827-7
ISBN (Electronic)978-1-6654-0298-9
DOIs
Publication statusPublished - 2021
Event2021 International Aegean Conference on Electrical Machines and Power Electronics (ACEMP) & 2021 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) -
Duration: 2 Sep 20213 Sep 2021

Conference

Conference2021 International Aegean Conference on Electrical Machines and Power Electronics (ACEMP) & 2021 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)
Period02/09/202103/09/2021
SeriesOptimization of Electrical and Electronic Equipment (OPTIM), Proceedings
ISSN1842-0133

Keywords

  • small-signal model
  • stability analysis
  • comparison
  • vector current control
  • grid following inverter

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