The study results show that the configuration capacity of energy storage system and the composite cost of investment and operation can be effectively reduced when vehicle-to-grid is considered, meanwhile considering uncertainty can improve the ability of the charging station to resist risks. 1. Introduction
In this paper, a system operation strategy is formulated for the optical storage and charging integrated charging station, and an ESS capacity allocation method is proposed that considers the peak and valley tariff mechanism.
During their discharging period, the maximum discharge power is achieved at 19h and 20h, because all EV clusters participating in V2G are connected to the grid at 19h, and discharging at rated power can fully reduce peak load, thereby reducing monthly basic capacity cost, and configuration capacity of ESS and investment cost.
Vehicle-to-grid and uncertainty are considered for charging station configuration. •k-means method is used to cluster electric vehicles participating in vehicle-to-grid. •Peak load, energy storage capacity and total cost can be reduced by vehicle-to-grid. •Anti-risk ability of charging stations can be improved when uncertainty is considered.
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