PURPOSE: A V2G(Vehicle-to-Grid) service method for linking a new and renewable energy source, an auxiliary energy storage apparatus, and an electric vehicle charging station is provided to strengthen the flexibility and stability of system management and to contribute the improvement of profitability with determining the priority of charging and discharging based on a market value considering the variability of new and renewable energy. CONSTITUTION: A V2G(Vehicle-to-Grid) service method allows the power system of an electric vehicle charging station to receive power from new and renewable energy power system, a power system, or an electric vehicle, to charge a storage apparatus with the power, and to charge the electric vehicle or discharge the power to the power system. When the produced power of the new and renewable energy power system is below a reference value, the method previously charges the power system of an electric vehicle charging station with the power as much as a charging capacity, and charges or discharges an energy storage apparatus for an auxiliary service and the power system of the electric vehicle with the surplus voltage of the power according to priority. When the produced power of the new and renewable energy power system is below the reference value, the method checks the charging amounts of the energy storage apparatus for the auxiliary service and the power system of the electric vehicle, and supplies the power to the electric vehicle to be charged through the electric vehicle charging station according to the burden ratio of the energy storage apparatus for the auxiliary service and the power system of the electric vehicle. [Reference numerals] (AA) Output renewable energy; (S10) Production power Reference value; (S20) Surplus power Charging capacity; (S30) Store the power into a charging station; (S40) 1. Store the power into a charging station 2. Store the power into a storage unit; (S50) Supply the power by the charging station and the storage unit
展开▼
