Active synchronous control method and system for distributed energy storage fast and smooth grid connection

The invention discloses an active synchronization control method and system for distributed energy storage fast and smooth grid connection, and the method comprises the steps: obtaining a first voltage vector of distributed energy storage and a first voltage vector of a power grid, and generating a frequency synchronization control signal and a voltage synchronization control signal of a distributed energy storage unit through a PI controller; inputting the frequency synchronization control signal and the voltage synchronization control signal into a droop controller for calculation, and generating an output voltage reference signal of the distributed energy storage unit; through cooperative control of a voltage and current double-loop controller and an inverter, adjusting the actual output voltage of the distributed energy storage unit based on an output voltage reference signal; judging whether the adjusted actual output voltage meets the grid-connected control requirement of the distributed energy storage