# A Game Theoretic Approach for Energy Sharing in the Italian Renewable Energy Communities
## 4 Case Study
### Users Consumption  
The power profile of each user (active and passive) under the MV/LV substation has been obtained from real measurements collected by the DSO. The selected LV network has already some PV power plants connected, but for the goal of this application, they have been removed in order to consider a more generic greenfield project. In Porossan there are two MV/LV substations: Chapelle and Chiou. The nominal power of each transformer is 250 kVA. The power profile of the transformer in the substations is available from the local DSO. Their data have been elaborated assuming realistic assumptions, as detailed in the following. Figure 2: The village of Porossan and its location in Italy. The red circle indicates the area feeder by the substation Chiou. To evaluate the feasibility of a REC in the area fed by Chiou, the number of users connected and their consumption needs to be known. The information about number and type of users connected is obtained from public dataset (ISTAT). Specifically, in Porossan there are 245 buildings, some of them are divided in more than one internal unit, for a total number of 324 units. We suppose that each unit has its own POD. According to the Italian regulation, LV users can be of three different types: domestic (that can be resident or not resident), for \"other usages\" and for public lighting. The number of families living in Porossan according to ISTAT data is 247, for a total number of 565 people. The number of people in each family is reported in the Table 1. Since we are supposing that the grid of Chiou feeds 40% of the village of Porossan, the number of families is then adapted to this quote. Each family has its own POD of residential type _Domestico residente_. The consumption of each type of family is supposed to increase with the number of people in the family, with the following formula:  
\[Consumption=500+600\cdot N_{members}\ [kWh/year] \tag{42}\]  
The yearly consumption for each type of family is reported in Table 1. Giving this hypothesis, the mean yearly consumption results to be 1862 kWh. This value is comparable with the average value for domestic residential users for the entire Valle d'Aosta Region (2018 kWh/year according to DSO data). From ISTAT data, we also know that 38 building units in Porossan are for not domestic usages, it means they are used for economic activities, business and other services. From the electrical point of view, they are all labelled as other usages (_Altri usi_). Keeping the hypothesis that 40% of the load is under Chiou substation, we consider 16 users of this type. We suppose that the users of this type have a yearly consumption equal to 1356 kWh, that is the average value in the entire Valle d'Aosta Region. The units that are not residential or for other usages are domestic users not resident (_Domestico non residente_). These are not related to people living in the area and, giving the tourist interest of the place, they could be holiday houses. According to the hypothesis that 40% of Porossan's users are under the grid of Chiou, we obtain that there are 15 users of this type. We suppose that yearly consumption for LV domestic but non residential users is equal to the mean value for the Valle d'Aosta Region, that is equal to 642 kWh. Finally, we suppose also that the total consumption for public lighting is equal to 2000 kWh/year. The total consumption of the LV grid results to be equal to 217.2 MWh/year. To compute energy balances, a specific hourly profile has to be assigned to each type of user. Users Power Profiles  
The hourly power transit in the substation is measured by the DSO and reported in Figure 3. It is clear that many PV power plants are installed and, especially in spring and summer, there is an important