Power control system and method for plural energy storage devices

The present invention relates to a power control system and method for a plurality of energy storage devices. The first converter is connected to one end of the power control system includes a first power system for a plurality of energy storage devices is converted to voltage is connected to the other end portion DC link in accordance with the present invention; The one end is connected to a second power grid, and a second converter for converting the voltage is connected to the other end of the DC link section; First energy storage device for storing electrical energy; DC-DC converter which one end is coupled to the first energy storage device, and converts the voltage is connected to the other end of the DC link section; A second energy storage device coupled to the DC link portion storing electrical energy; And it is characterized in that on the basis of the voltage of the second energy storage device and a control device for controlling the voltage of the first and second converters.