Impedance Decomposition for Design-Oriented Analysis of Grid-Forming Voltage-Source Converters
作者： Yicheng Liao , xiongfei wang
DOI: 10.36227/TECHRXIV.12855167.V1
关键词: Voltage source 、 Electrical impedance 、 Converters 、 Computer science 、 Sideband 、 Stability (probability) 、 Grid 、 Nyquist stability criterion 、 Control theory 、 Control theory
摘要: 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, article starts the impedance modeling and of grid-forming VSCs grids. Then, an impedance decomposition approach characterizing the impacts of multiple loops is proposed, benefits for enhancement. Finally, simulation and experimental results are provided validate approach.
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