Abstract: A power grid control device of the present invention may comprise: a grid input interface for receiving an input of information on an operation state of a power grid; a grid output interface for outputting a signal for operating the power grid; a communication interface for performing data communication with a remote device; a component unit in which a plurality of software components for performing individual functions required for operating the power grid are stored; and a processing module for executing the components to process a work required for the operation of the power grid.

Abstract: A method of controlling output of an ESS depending on droop control according to frequency variation range of a power grid in the present invention may comprise steps of: monitoring the frequency variation range of the power grid; predicting frequency correction range resulting from regulation of an engine generator during a predetermined unit regulation time if the frequency variation range is determined to exceed a first reference value; controlling the output of the ESS with an output value determined by a frequency of the power grid according to a droop control algorithm set as a default if the predicted frequency correction range does not exceed a second reference value; and fixing the output of the ESS during the unit regulation time if the predicted frequency correction range exceeds the second reference value.

Abstract: A power grid control device of the present invention may comprise: a grid input interface for receiving an input of information on an operation state of a power grid; a grid output interface for outputting a signal for operating the power grid; a communication interface for performing data communication with a remote device; a component unit in which a plurality of software components for performing individual functions required for operating the power grid are stored; and a processing module for executing the components to process a work required for the operation of the power grid.

Abstract: Provided is a microgrid system having: a plurality of distributed power sources; a plurality of distributed loads; and lines for connecting the distributed power sources and the distributed loads, the microgrid system including: an ESS for storing power supplied from all or a portion of the distributed power sources and supplying the stored power to all or a portion of the distributed loads; an ESS PCS including an interruption means for converting the power stored in the ESS into AC power suitable for the microgrid and supplying the AC power to the microgrid in order to block connection to the microgrid in an abnormal state; and a monitoring/control device for gradually increasing a voltage output from the ESS PCS and performing processing for the failure when a failure is detected in the microgrid.

Abstract: A method of controlling output of an ESS depending on droop control according to frequency variation range of a power grid in the present invention may comprise steps of: monitoring the frequency variation range of the power grid; predicting frequency correction range resulting from regulation of an engine generator during a predetermined unit regulation time if the frequency variation range is determined to exceed a first reference value; controlling the output of the ESS with an output value determined by a frequency of the power grid according to a droop control algorithm set as a default if the predicted frequency correction range does not exceed a second reference value; and fixing the output of the ESS during the unit regulation time if the predicted frequency correction range exceeds the second reference value.

Abstract: Provided is a fault processing method of a microgrid having a plurality of distributed energy resources, a plurality of distributed loads, lines that connect the distributed energy resources and the distributed loads, and an energy storage system (ESS) that stores power supplied from a part or all of the distributed energy resources and supplies the stored power to a part or all of the distributed loads, the fault processing method comprising steps of: disconnecting the distributed energy resources and an ESS power conditioning system (ESS-PCS) responsible for the ESS when a fault is detected in the microgrid system; connecting the ESS-PCS to the microgrid; determining a location of the fault while gradually increasing a voltage output from the ESS-PCS; and disconnecting the location of the fault and boosting the voltage output from the ESS-PCS to a normal operation level.

Abstract: Provided is a microgrid system having: a plurality of distributed power sources; a plurality of distributed loads; and lines for connecting the distributed power sources and the distributed loads, the microgrid system including: an ESS for storing power supplied from all or a portion of the distributed power sources and supplying the stored power to all or a portion of the distributed loads; an ESS PCS including an interruption means for converting the power stored in the ESS into AC power suitable for the microgrid and supplying the AC power to the microgrid in order to block connection to the microgrid in an abnormal state; and a monitoring/control device for gradually increasing a voltage output from the ESS PCS and performing processing for the failure when a failure is detected in the microgrid.

Abstract: Disclosed is an method and apparatus for electric power distribution in an energy storage system. The electric power distribution method of the energy storage system (ESS) includes computing a total power amount on the basis of a received user output target power amount and a deviation amount, determining a power distribution power conditioning system (PCS) to which the total power amount is distributed out of the PCSs included in the ESS, and distributing the total power amount on the basis of the power distribution PCS. The deviation amount is a difference between an existing user output target power amount used in an existing power distribution process and an existing total power amount.

Abstract: Provided is a power supply control method and system capable of efficiently adjusting an ESS charge/discharge operation on the basis of a load measurement value and a power generation amount measurement value.

Abstract: Disclosed is an method and apparatus for electric power distribution in an energy storage system. The electric power distribution method of the energy storage system (ESS) includes computing a total power amount on the basis of a received user output target power amount and a deviation amount, determining a power distribution power conditioning system (PCS) to which the total power amount is distributed out of the PCSs included in the ESS, and distributing the total power amount on the basis of the power distribution PCS. The deviation amount is a difference between an existing user output target power amount used in an existing power distribution process and an existing total power amount.