Control of power converters in distributed generation applications under grid fault conditions
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The operation of distributed power generation systems under grid fault conditions is a key issue for the massive integration of renewable energy systems. Several studies have been conducted to improve the response of such distributed generation systems under voltage dips. In spite of being less severe, unbalanced fault cause a great number of disconnections, as it may produce the injection of unbalanced currents that can easily conduct to the tripping of the converter. In this paper a current control strategy for power converters able to deal with these grid conditions, without exceeding the current ratings of the converter is introduced. Moreover, a novel flexible algorithm has been proposed in order to regulate easily the injection of positive and negative currents for general purpose applications.
CitationRodriguez, P. [et al.]. Control of power converters in distributed generation applications under grid fault conditions. A: IEEE Energy Conversion Congress & Exposition. "III IEEE Energy Conversion Congress & Exposition". Phoenix, Arizona: IEEE, 2011, p. 2649-2656.