A novel integrated configuration of Grid-connected photovoltaic plant with UPS: reliability estimation

This paper proposes a novel configuration of an electrical system, in which a photovoltaic plant (PV), used as support and integration, is interconnected to the DC-side of a conventional uninterruptible power system (UPS). The proposed configuration introduces important advantages compared to the configuration, in which no direct PV-UPS interconnection exists. In the paper, the attention is focused on the estimation of the reliability improvement as regards the supply of the critical loads. In particular, the reliability estimation is performed in terms of the number of the critical loads interruptions over a certain period of time by using the Monte Carlo simulation method.