This paper proposes a tuning method for the critical virtual inertia parameters of VSG-PMSG in the medium wind speed region. Firstly
a VSG-PMSG model is established to analyze the effective kinetic energy range of the frequency response of the unit to system. Secondly
a frequency modulation small signal model for VSG-PMSG is constructed
and the critical virtual inertia tuning considerations are derived. Finally
a critical virtual inertia tuning method for the frequency response of VSG-PMSG to system is proposed
and the influence of virtual inertia changes on the frequency dynamic response performance of VSG-PMSG is analyzed based on the root locus
which provides a basis for the selection of frequency control parameters under multiple operating conditions. Multiple operating conditions are compared and analyzed through Matlab/Simulink simulation to verify the correctness of theoretical analysis.
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