Day-ahead Real-time Coordinated Optimization Method for Distribution Network of Electric Vehicle Charging Station with Photovoltaic Power Generation
Due to the large amount of access to electric vehicle(EV)charging stations,the stability of coordinated optimization of distribution network is affected.Aiming at the problems of large load fluctuation,different voltage and battery capacity,a day-ahead real-time coordinated optimization method for EV charging station distribution network with photovoltaic power gen-eration is designed.The electric load of EV charging station is analyzed,and the probability distribution function of EV driving distance and charging time is calculated to obtain the load function of each key task.An active distribution network scheduling optimization model with photovoltaic power generation is established.The upper and lower limits of active power output load are calculated,the minimum objective function of day-ahead active power fluctuation is constructed.The constraint conditions of voltage and battery capacity under the objective function are set.The distribution network coordinated optimization algorithm is designed.And the distribution network coordinated optimization of EV charging station is completed.The experimental re-sults show that under the application of this method,the total active power output of photovoltaic power generation device and gas turbine is greater than the power grid load,meeting the charging demand of 2000 EVs,and the day-ahead real-time net ac-tive power load fluctuation is only 100 kW,so the coordinated optimization process is more advantageous.
photovoltaic power generationelectric vehiclecharging stationcoordinated optimization of distribution network
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