Aug 2026· 2026 6th Power System and Green Energy Conference (PSGEC)· pp. 542-546· 0 citations· 10 references
Abstract
Grid-forming virtual synchronous generators may experience low-frequency instability when controller settings change or network strength change. To examine this issue, a small-signal representation of a single grid-connected VSG is developed. The model incorporates power regulation dynamics, impedance emulation, cascaded voltage-current control, and transmission-line behavior. Modal characteristics are evaluated using system eigenvalues and state participation factors, with emphasis on how inertia emulation, damping coefficients, and grid short-circuit ratio influence the dominant oscillatory mode. An auxiliary controller inspired by the power system stabilizer is then designed to provide additional damping, and its output is added to the reference value of the voltage magnitude. Simulation results demonstrate that this method shifts the low-frequency mode toward a more strongly damped region, suppresses oscillations in both active and reactive power, and consequently enhances the dynamic stability of the grid-connected system.
Virtual synchronous generator (VSG) control is widely used to support the stable integration of converter-interfaced renewable generation. The active-power damping coefficient Dp and constant virtual resistance Rv tune VSG oscillations through the swing equation and the converter electrical port, respectively. However,...
Chun-Lin Chen, Xiao-Fu Xiong· 2026 6th Power System and Gr...· 0 citations
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With increasing renewable penetration, virtual synchronous generators (VSGs) have become an important solution for stabilizing converter-interfaced renewable generation because of their inertia support and grid-forming capability. However, under weak-grid voltage sag conditions, the transient synchronizing stability of...
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To enhance the frequency support capability of wind–storage systems under high wind power penetration and alleviate the coupling among virtual inertia, damping, and active-power–frequency branch parameters in conventional grid-forming/virtual synchronous generator control, this paper proposes a damping–inertia adaptive...
Yi-Feng Zhu, Jie Chen, Jian-Bing Lv et al.· Electrical Engineering· 0 citations
This paper proposes an adaptive virtual synchronous generator (AVSG) control strategy for three-phase grid-forming (GFM) inverters to enhance the stability and dynamic performance under power disturbances. Unlike conventional methods that use frequency deviation to adjust the VSG inertia and damping coefficients, the p...
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