中风速区域下 VSG-PMSG 临界虚拟惯量参数整定方法

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.