ELECTRIC VEHICLE CHARGER APPLIED FAST DEMAND RESPONSE IN ANCILLARY SERVICE OF ELECTRIC POWER SYSTEM, METHOD AND APPARATUS FOR CONTROLLING CHARGING POSER OF THE ELECTRIC VEHICLE CHARGER

摘要

It relates to an electric vehicle charger for high-speed demand response for real-time response to variability and intermittentness in a renewable energy-based power system. An electric vehicle charger according to an embodiment includes a charging unit that charges an electric vehicle by supplying power, a frequency measurement unit that measures the frequency of a power system in real time while charging the electric vehicle, and a plurality of step-by-step charging power divided according to a preset frequency fluctuation compared to a reference frequency. A power control unit that determines a step corresponding to the measured frequency based on a control criterion including a control ratio, and automatically adjusts the charging ratio of the electric vehicle according to the charging power control ratio of the determined step.