Smart load priority control for a SPV-UPS

Abstract

The paper deals with a smart load priority control strategy for Photovoltaic Uninterruptible Power Supply (PV-UPS) system. This hybrid uninterruptible power supply system achieves an auxiliary source of energy supply from photovoltaic modules, which operates in case of blackouts by providing a set of loads determined by the continuity of service during the absence of power supplied by the AC network. The proposed system is mainly designed for the field of home appliances. The proposed solution is based on a stand-alone photovoltaic system with a conventional UPS. A key role is played by an intelligent control strategy that handles both the charge of a suitable stack of batteries and the electrical loads connected to UPS. UPS enables loads to be supplied by assigning them an index of priority established by the operator, depending on their importance or safety.