SSR_200824.pdf (2.09 MB)
Download file

Impedance Decomposition for Design-Oriented Analysis of Grid-Forming Voltage-Source Converters

Download (2.09 MB)
posted on 2020-08-28, 03:27 authored by Yicheng LiaoYicheng Liao, xiongfei wang

Grid-forming voltage-source converters (VSCs) tend to suffer from sideband oscillations in stiff grids. Conventional state-space eigenvalue analysis or impedance-based stability analysis based on generalized Nyquist stability criterion can only analyze how specific control parameters affect the overall system stability, which ends up with less insight into a controller design-oriented analysis. To tackle this challenge, this article starts with the impedance modeling and stability analysis of grid-forming VSCs in stiff grids. Then, an impedance decomposition approach to characterizing the impacts of multiple control loops is proposed, which benefits in a controller design-oriented analysis for stability enhancement. Finally, simulation and experimental results are provided to validate the approach.


Email Address of Submitting Author

ORCID of Submitting Author


Submitting Author's Institution

Aalborg University

Submitting Author's Country

  • Denmark