Method for controlling energy storage system and devices performing method

A server device comprising:

• a memory including instructions;
• and
• a processor electrically connected to the memory, the processor configured to execute the instructions,
• wherein, when the instructions are executed by the processor, the processor is configured to:
• analyze energy information of an area for which a peak power load is to be calculated received from a plurality of clients included in the area;
• generate, based on an analysis result, scheduling control information for controlling an energy storage system (ESS) connected to the plurality of clients on a daily basis;
• generate, based on a threshold value at which a power conversion system (PCS) included in the ESS is capable of converting power and an energy consumption pattern in the area included in the analysis result, the scheduling control information for controlling charging and discharging of the ESS;
• determine, based on the scheduling control information, whether to generate real time control information for controlling the ESS on a basis of a predetermined control time period;
• correct, based on the real-time control information, the scheduling control information;
• and control the ESS based on the scheduling control information,
• wherein the peak power load is an amount of peak power supplied to the area by a power backbone network that supplies power to the area, and
• wherein the energy information includes energy consumption information, energy generation information, and energy storage information generated by the ESS.