Research on solar-storage-DC hybrid energy storage based on park distributed grid

For the purpose of making full use of the advantages of the hybrid energy storage system and another purpose of trying to make the advantages of each kind of energy storage battery complement each other,and also considering the average weak damping and midiume low inertia of the energy storage converter,one kind of frequency division control strategy of the hybrid energy storage unit based on the virtual DC generator control is proposed.Based on the frequency division control of the hybrid energy storage unit.As a matter of fact, the control strategy adopts the virtual DC generator control for the power density battery energy storage converter to increase the damping and inertia of the power density energy storage and improve the dynamic stability of the DC bus voltage.In order to verify its effectiveness,and also the simulation and comparative analysis of the micro-source variation and load fluctuation and the traditional droop control are carried out,which enhances the charging and discharging part.