Design and Development of a Grid-tied Transformerless Single-stage Multistring Photovoltaic CSI Inverter

– This paper brings the design and development of a transformerless single-stage multistring photovoltaic current-source inverter (CSI), aiming exclusively the grid-tied operation. Due to the behavior as CSI, within the contributions of the present work there is the expansion of the literature of this type of topology through the implementation of control techniques and power operation usual in other topological structures. In addition, the proposed system was simulated in PSIM® and the computational and experimental results obtained showed a satisfactory behavior of the structure in favor of the injection of current in the grid with low harmonic distortion and high power factor, meeting national and international standards.