| 摘要 |
The present invention relates to a power control apparatus using a DC bus signal of a switching frequency modulation type in a DC grid system and a power control method using the same. According to the present invention, the method comprises the following steps of: operating a power value provided to or from a DC line by an energy storage apparatus and a DC power network; selecting a switching frequency value corresponding to the operated power value from power control graph information which defines a switching frequency value fluctuated according to the power value, and an output current values, corresponding to the switching frequency value, of the energy storage apparatus and the DC power network; and providing a DC bus signal loading the selected switching frequency value on a DC bus voltage to the DC line to control the power of the energy storage apparatus and the DC power network. According to the present invention, by using the DC bus signal of a switching frequency modulation type, transmission of power state information and a power flow of each component connected to the DC line in a DC grid system are effectively controlled, and information exchange is smoothly performed by using an existing DC power line without any communication line and an effect of components or operation environment of a load. |
