Systems design criteria for uniformly distributed loads

This paper discusses of electrical distribution for refrigerated containers (reefers) in port terminals, characterized as parks of distributed loads. Power systems of uniform distributed loads (UDLs) need configurations with modularity whenever possible, to ensure an easier installation, management and maintenance, significant cost reductions, quality control. The cases of UDLs are present in many applications, both active and passive, ranging from racks of reefers, recharging battery banks of E-Trucks to the strings of a photovoltaic park. The paper suggests simple designing criteria, generally not applied in the ports, consisting in the adoption of a main MV distribution loop for the reefers parks, where in apposite container for each rack or group of racks, transformers supply locally a modular LV distribution to the reefers. This approach offers a relevant flexibility for expansions and endorses development of new fitting components.