In order to improve the stability of the energy storage sources system in the micro-grid and make the best of its power relaxation

we propose a control strategy of multiple energy storage sources based on power-interaction and dynamic allocation.Firstly

the operating mode of the system is determined according to the power difference between source and load

and the energy-storage-sources-dominated mode is divided further.Thereby

the power-interaction control between the energy storage sources is proposed

in which the critical units carry out the reverse power under the system power balance premise so that the state of charge can restore to the stable operating interval.Secondly

the power dynamic allocation strategy considering chargeable/dischargeable quantity of electricity and power limit is proposed

which is assigned to the allocation of the interaction revised power and the the total power

meanwhile

the distribution ratio correction ring is introduced to avoid the power overrun situation caused by proposed allocation strategy.Lastly

the proposed control strategy is applied to the DC micro-grid.The simulation results verify the strategy can realize the functions of the self-recovery for the charge state of the critical energy storage unit and the self-distribution of the total power of the system

furthermore

the reliability and flexibility of the energy storage system are improved.