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The effect of disordered electric vehicle charging and discharging on security and economic operation of the power system has serious negative effects. To avoid this problem, the emulation system of electric car charging stations is constructed according to the analysis of energy efficiency of electric vehicle charging stations based on double optimization. The whole energy efficiency of the charging station can be divided into two factors: the first is charging function model. The actual work of their loss is emulated in the different load conditions charger each element based on a lithium-ion battery charging characteristic curve typical charger establish energy model. The second is energy efficiency model for charging stations. the energy loss of charging station system is simulated according to the type of charger, charging station power mode energy consumption structure and configuration.

Energy Efficiency Simulation Study of Electric Car Charging Stations Based on Double-mode