INTEGRATED CONTROL STRATEGY OF VIRTUAL SYNCHRONOUS MACHINE BASED ON OPTIMAL POWER COMPENSATION AND INERTIA DAMPING ADAPTION

Ling Guo; He Shan; Fan Xiaochao; Xu Lijun

doi:10.19912/j.0254-0096.tynxb.2024-1930

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (3) : 134-145. DOI: 10.19912/j.0254-0096.tynxb.2024-1930

INTEGRATED CONTROL STRATEGY OF VIRTUAL SYNCHRONOUS MACHINE BASED ON OPTIMAL POWER COMPENSATION AND INERTIA DAMPING ADAPTION

Ling Guo¹, He Shan^1,2, Fan Xiaochao³, Xu Lijun³

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Abstract

To enhance the dynamic response capability of renewable energy grid-connected inverters under multiple operating modes （grid-connected mode and stand-alone mode）, a comprehensive virtual synchronous generator （VSG） control strategy based on optimal power compensation and adaptive inertia and damping is proposed. Firstly, the mathematical model of a conventional VSG is established, analyzing the impact of virtual parameter variations on system stability. Secondly, a radial basis function （RBF）-based adaptive method for the VSG is proposed, achieving parameter decoupling and enabling dynamic adjustment of system parameters in response to frequency variations. Subsequently, based on the VSG active power-frequency droop characteristics, a predictive model is constructed and discretized. A cost function using angular frequency deviation and VSG output power as performance indices is designed. The optimal power increment is computed via quadratic programming to adjust the VSG’s active power reference value in real-time, thereby improving the active power and frequency response characteristics during transients. Finally, simulation results demonstrate that the proposed control strategy effectively suppresses output power and frequency overshoot and oscillations, reduces the rate of change of frequency and frquency deviation, and enhances the response speed of active power and frequency.

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grid-connected inverter / virtual synchronous generator / model predictive control / radial basis function neural network / quadratic programming / power-frequency response

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Ling Guo, He Shan, Fan Xiaochao, Xu Lijun. INTEGRATED CONTROL STRATEGY OF VIRTUAL SYNCHRONOUS MACHINE BASED ON OPTIMAL POWER COMPENSATION AND INERTIA DAMPING ADAPTION[J]. Acta Energiae Solaris Sinica. 2026, 47(3): 134-145 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1930

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