Method for controlling output of long period or short period in energy storage system

摘要

The present invention relates to a system for storing renewable energy including wind power and solar heat, and a method of controlling a short-term periodic output in an energy storage system including a short-cycle ESS (Energy Storage System) and a long- Controlling the output of the long-period ESS according to a current SOC state of the short-cycle ESS if the current state of charge (SOC) of the long-period ESS is within a predetermined upper limit SOC and a lower limit SOC, Controlling the discharging of the long-period ESS according to a predetermined discharging time when the current SOC of the long-period ESS is equal to or higher than the upper limit SOC, . According to the present invention, in the renewable energy storage system, the output fluctuation rate of the renewable energy is suppressed and the stable output is provided, so that the rapid change of the system can be prevented in advance.