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In the last years, distributed generation (DG) and microgrid (MG) technologies have been used to moderate the stress due to main stream utility grid electricity demand increase. The dispatch of renewable distributed energy sources at present is performed in such a way that, when implemented at very large scale, their intermittency can impact on the grids, what leads to concerns in terms of power quality...
In the last years, there was an increased interest in distributed generation. In particular, national and international government has developed incentives programs for installation by final customer small size photovoltaic, wind and CHP plants. In this context the concept of micro-grid (MG) arises. The term of MG is taken to mean a subset of power distribution systems that contains sufficient local...
In this paper a system in which a photovoltaic plant (PV) and a mini Wind plant integrated in a Uninterruptible Power System (UPS) is presented. The aim is to reduce the critical loads loss due to long interruption of the main supply, using the power produced by renewable sources. Obviously the critical load loss depends on many stochastic variables: main supply interruptions, battery capacity and...
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...
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