Abstract
The main objective of this study is to offer an approach to analyze the performance of different three-phase four-wire residential rooftop photovoltaic system topologies. Among different photovoltaic system topologies, this work focuses on the two most used. These two photovoltaic topologies have different design regarding the neutral wire. The first topology includes a DC-link neutral point and the second one incorporates a Delta/Star grounded transformer. Authors conduct a comparative study of both topologies based on the following criteria and constraints: (1) the battery and the DC link capacitors lifetimes; (2) the impact of non linear load on the neutral current; (3) the power quality; (4) the cost of the photovoltaic system topology and (5) voltage and current total harmonic distortion. Analyses are supported by simulation results performed under PSIM software.
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