Method of controlling charging and discharging of battery energy storage device and the battery energy storage device for the same

摘要

A method of charging and discharging battery energy storage device is provided. The method 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 on the basis of the frequency of the grid, the SOC offset value and the SOC feedback gain value and controlling charging and discharging of the battery.

主权项

1. A method of charging and discharging battery energy storage device, comprising:
storing, in a data storage, data necessary for a voltage droop control and a frequency droop control for a battery; measuring, via a SOC measuring unit, a SOC value of the battery; measuring, via a grid voltage and frequency measuring unit, a voltage and a frequency of the grid; performing, via a charging and discharging control unit, the voltage droop control and frequency droop control corresponding to the voltage and frequency of the grid by using the data stored in the data storage, a SOC offset value, and a SOC feedback gain value of the battery, which are calculated on the basis of the SOC value; outputting, via the charging and discharging control unit, a control signal for performing charging and discharging on the battery while preventing overcharging and over-discharging at the time of charging and discharging the battery; and charging or discharging the battery, via a charging and discharging unit, according to the control signal.