smart charge

Smart charging refers to a charging system where electric vehicles, charging stations and charging operators share data connections. Through smart charging, the charging stations may monitor, manage, and restrict the use of charging devices to optimize energy consumption. Comparing with uncontrolled charging, smart charging will flatten the electricity usage peak by shifting the peak due to vehicle charging away from the peak due to other consumption.Smart charging can be divided into two charging management systems, User-managed charging (UMC) and Supplier-managed charging (SMC).For UMC, a Time-of-Use tariff is applied, and the customer decides the timing to charge based on the price and needs. The EV charging profile under Time-of-Use tariff is off-peak EV charging, is an abrupt rise in charging load at the time where the electricity pricing goes down. Comparing to peak EV charging profile caused by uncontrolled charging, UMC will delay the peak charging load formation to a specific later time, usually between 9:00 pm and 10:00 pm, depending on electricity pricing regulation.In SMC, the charging and discharging decision is made based on multiple signals: real-time energy production, local energy consumption, as well as the state of charge information from nearby EVs and other electric devices. A gradual rise in the charging load can be observed within the off-peak hours. Ideally, the EV charging peak is self-adjustable to fit the real-time electricity demand gap at off-peak hours.

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