虚拟负电感控制的高频段参数整定方法OACSTPCD

The coupling of multiple converters between hardware and algorithm will directly affect the stability of grid voltage with the improvement of power electronics in DC microgrid.To analyze the mechanism behind voltage oscilla-tions caused by constant power load,a complex frequency domain model of the DC microgrid was established,and the constraint conditions of voltage stability were derived.On this basis,a virtual negative inductance compensation link was constructed to offset the influence of LC filter inductance on voltage stability.This approach aimed to meet the con-straint conditions and suppress voltage oscillations within the system.The high-frequency compensation method and en-gineering design method for virtual negative inductance were studied in detail,and a parameter setting method was also given.Finally,the stability of the DC microgrid was analyzed using the Nyquist criterion,and the effectiveness of the proposed algorithm was verified by experimental results.