Good practice:

Vehicle to grid in the energy communities

Distributed storage could solve problems due to electric vehicles widespread. If many e-vehicles are charged at the same time on the same network, this one not always support the energy request and, without a control logic, the increasing frequency of e-car charges could lead to a network overloading. Storage system located at the Consumer homes can both solve network overloading and reload the storage systems at Consumers homes during the hours absence. Energy stored during the day, in case of combination with RES (photovoltaic) when the system is more effective, can be "poured" into car batteries in evening, mitigating the so-called 'duck curves' effects, typical of evening hours because of the increasing of energy consumption. Distributed storage, appropriately controlled and in a nanogrid system, is an ideal solution for many e-vehicles users with no needs of fast charging during night. Finally, the bidirectional nature of streams (vehicle to grid), achievable through nanogrid, enables the implementation of an extended V2G storage system, leveraging the storage potential of the vehicle. This system could be applied in building, vehicle to building (V2B). Vehicle is charged when it is economically convenient or to balance RES overproduction. Conversely, energy stored can be reused during the high tariff time bands or to supply energy to the network. V2G could mitigate grid peaks with no need of additional power plants. SHs: Univ. of Calabria (UNICAL), of Marche, ENEA.

50.000 €
3 FTE

• project realizes the concept of nanogrid community (Smart microgrid) by the interconnection of 3 nano Grids for Home Applications (nGfHAs) on the same grid represented by a DC-BUS (Direct Current-communication channel). V2G charging station is integrated in one of nanogrids.
• Since charging station has recently been installed, it is only possible to estimate that in distributed storage community framework the V2G could reduce CO2 emissions by 50–60%.
• Public incentives are fundamental.

Currently, is considered as a strong limitation the absence of a specific regulatory framework. Another limitation is linked to the more rapid aging of the vehicle storage system when it is required to provide quick balancing services and not a simple recharge for the vehicle's autonomy.

The project can be replicated in other University campus to realize an internal sustainable mobile infrastructure with minimum environmental impact obtaining in a V2G configuration additional revenue selling power back to the grid providing ancillary services. The activity will continue by defining a model for optimal management of vehicle recharging in V2G configuration to maximize profit.
Here the transferability evaluation through 3 parameters: ease of Implementation: easy; Impact: high; Benefit - cost ratio: somewhat high. This prioritization was used for all Good Practices of E-MOPOLI, more info in Source Book available here: www.interregeurope.eu/e-mopoli/library.