METHOD OF CONTROLLING CHARGING AND DISCHARGING OF BATTERY ENERGY STORAGE DEVICE AND BATTERY ENERGY STORAGE DEVICE FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method of controlling charging and discharging of a battery energy storage device.SOLUTION: A method of charging and discharging a battery energy storage device includes measuring a voltage and a frequency of a grid, measuring a state of charge (SOC) value of a battery, calculating an SOC offset value and an SOC feedback gain value from the measured SOC value of the battery, and performing a voltage droop control based on the voltage of the grid and a frequency droop control based on the frequency of the grid, the SOC offset value and the SOC feedback gain value so as to control charging and discharging of the battery.