DC autonomous distribution control system for efficient power transmission and distribution between loads in a micro grid and its operation method

摘要

(Electricity) or an energy source in the micro grid of the present invention to store electrical energy transmitted by requesting transmission to the connected cell or energy source, or to transfer the electrical energy to another cell that requests load or transmission And more particularly, to a DC distribution control system and a method of operating the same. A control unit for blocking or controlling the operation of the entire system; A one-way DC-DC converter for converting a plurality of DC power sources of different sizes and types into a voltage and a current of a predetermined magnitude and outputting the same; A bidirectional DC-DC converter having one side connected to a DC distribution line (DC-Grid) and the other side connected to a one-way DC-DC converter; And a stand-alone DC-AC inverter connected to the conversion devices and supplying the supplied DC power to the AC load inside the cell. The DC power distribution system of the present invention further includes a DC distribution autonomy control system (DC-DACS) to a plurality of cells; Coupling the DC-DACS combined cell to the cluster DC grid; Connecting a plurality of clustered DC grids to a main DC grid; And a step (S400) in which the power transmission and the power reception are performed by the DC-DACS (S400), and a method of operating the DC distribution autonomy control system for efficient power transmission and distribution between the loads in the micro grid. Therefore, it is not necessary to install a large-scale facility by installing and operating a renewable energy facility in each cell unit, and it is configured to enable DC distribution autonomous control between cells and clusters by performing DC transmission and distribution using existing distribution lines.