DESIGN AND SIMULATION OF A SINGLE PHASE DC-AC CONVERTER FOR CONNECTION OF A PHOTOVOLTAIC GENERATION SYSTEM TO THE ELECTRICAL GRID
DOI:
https://doi.org/10.59627/cbens.2014.2161Keywords:
Photovoltaic generation, Static converter, Inverter, Grid connectionAbstract
In recent years, photovoltaic energy sources are becoming increasingly competitive, making its participation in the energy matrix of power systems presents a strong growth. Such expectation has resulted in a significant increase on the number of grid-connected systems. For connection to power grid, it is essential to use a dc-ac converter, which is able to suit the characteristics of the power provided by the photovoltaic modules to grid parameters. This paper presents a project proposal of a 2 kW single phase dc-ac converter for connecting a photovoltaic conversion system to a 220 Vrms single-phase grid, to enable a unitary power factor, low harmonic content current injection, in addition to power absorption, in order to feed the dc loads and charge a battery bank when the photovoltaic sources are not able to supply enough energy. The study shows that, with the application of an appropriate control strategy, it is possible to control the direction of power flow of the converter, and appropriately modulating the current injected or absorbed from the grid.
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