Resumo

GALLEGO LANDERA, Yandi A  e  LEON VILTRE, Lesyani. Comparison of reference current generation schemes in photovoltaic units under unbalanced faults. Energética [online]. 2021, vol.42, n.3, pp. 13-24.  Epub 24-Set-2021. ISSN 1815-5901.

Unbalanced voltage drops can lead to non-sinusoidal current injections and power oscillations at twice the fundamental frequency of the grid in photovoltaic parks connected to the electrical system. These oscillations can damage the inverter DC link capacitor, which is one of the components that most limits the life of the inverter. Proper controls of these converters can address this problem efficiently. In those solutions, the reference current calculation is one of the most important problems to be addressed for reliable operation of converters under unbalanced grid faults. This article presents a comparison of the reference current generation schemes, during a single-phase fault in the network..It provides an evaluation of the performance of different techniques and being able to help in the selection of the appropriate control during major network failures.

Palavras-chave : Reference currents; unbalanced faults; power oscillations.

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