Nissan will soon begin verification tests of an autonomous energy management system it has established in the Fukushima Prefecture of Namie in Japan .
The bidirectional vehicle to grid (V2G) energy management system uses an autonomous control system that generates 100 percent renewable energy for charging electric vehicles by sending electricity to and from them. The Nissan Leaf is one of the few electric vehicles to supprt V2G charging and so has been used in multiple pilot schemes around the world.
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Two problems faced by renewable energy are fluctuations in power generation caused by weather conditions and an imbalance in electricity supply and demand. Combining large-capacity EV batteries with a system that independently charges and discharges them allows renewable energy to be used more effectively and stabilizes the power grid.
Nissan’s autonomous decentralized control system will enable the town’s five EVs to be charged or discharged based on the amount of electricity generated by solar, wind and hydrogen fuel cells, and the electricity demand of the towns commercial facility.
To determine the optimal timing for recharging and discharging Namie’s EVs, the system considers their battery status and usage patterns.
The system is expected to lower the peak power consumption of the commercial facility and reduce electricity costs.
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