WANG Yang, LIAO Peng, YANG Mengling, et al. Analysis of Active Power Response Characteristics and Quantification of Power Coupling Strength in VSG under Multiple Types of Reactive Power Control[J]. 2025, 53(10): 61-69.
WANG Yang, LIAO Peng, YANG Mengling, et al. Analysis of Active Power Response Characteristics and Quantification of Power Coupling Strength in VSG under Multiple Types of Reactive Power Control[J]. 2025, 53(10): 61-69. DOI: 10.20204/j.sp.2025.10009.
Analysis of Active Power Response Characteristics and Quantification of Power Coupling Strength in VSG under Multiple Types of Reactive Power Control
In response to the decline in grid support capability caused by the integration of grid-following renewable energy units, virtual synchronous generator (VSG) technology has garnered significant attention and has been widely applied in new power systems. However, unlike conventional synchronous generators, when a VSG operates in medium- and low-voltage grids, the lines with high resistance-inductance ratios can easily lead to complex power coupling phenomena. Therefore, this paper proposes a novel analysis framework for VSG power coupling by integrating Bode diagram analysis and relative gain theory. Differing from existing qualitative analysis methods, this approach utilizes the dynamic and steady-state analysis capabilities of Bode diagrams and the coupling strength quantification ability of relative gain theory to systematically evaluate the impact of proportional reactive power control, inertia-based reactive power control, and proportional-integral reactive power control on the VSG’s power coupling strength and its active power response characteristics. It identifies the key control parameters influencing coupling and provides recommendations for the selection of reactive power control loops.
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