Composite energy storage microgrid grid connection coordination control method and system

The invention discloses a composite energy storage microgrid interconnection coordination control method and system. The method comprises the steps as follows: an energy storage management station receives a control command of a microgrid energy management system and state feedback commands of a super-capacitor energy storage module and a lithium iron phosphate battery energy storage module, controls a first energy storage converter and a second energy storage converter, and controls a super-capacitor and a lithium iron phosphate battery to work under any one of the following working conditions: the first working condition: a composite energy storage system adopts the working condition of smoothening power fluctuation; the second working condition: the composite energy storage system adopts the working condition of tracing and scheduling the output; and the third working condition: the composite energy storage system adopts the working condition of peak shaving and valley filling. According to the method and