Subhour Simulation of a Microgrid of All-Electric nZEBs Based on Italian Market Rules

In the present work, a microgrid of three active users (nanogrids) with the possibility of connection to the grid has been analysed in the context of the Photo Voltaic Zero Energy Network (PVZEN) project of Politecnico di Torino. The generators of the nanogrids (prosumers) are PhotoVoltaic (PV) strings, while the load is mainly diurnal because the system offers a service for university students and employees. In particular, this work aims to simulate the electrical performance of the system and quantify the economic benefits due to the creation of a microgrid with respect to independent nanogrids. In this framenwork, an ad hoc software in Matlab environment has been developed, implementing the rules of Italian day ahead electric market. Moreover, the software evaluates the optimal configuration of nanogrids (integration of batteries, presence and typology of connection to the grid) that maximizes the economic saving of the system.