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Review and Comparison of Step-Up Transformerless Topologies for Photovoltaic AC-Module Application

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4 Author(s)
David Meneses ; Universidad Politécnica de Madrid, Centro de Electrónica Industrial, Madrid, Spain ; Frede Blaabjerg ; Óscar García ; José A. Cobos

This paper presents a comprehensive review of step-up single-phase non-isolated inverters suitable for ac-module applications. In order to compare the most feasible solutions of the reviewed topologies, a benchmark is set. This benchmark is based on a typical ac-module application considering the requirements for the solar panels and the grid. The selected solutions are designed and simulated complying with the benchmark obtaining passive and semiconductor components ratings in order to perform a comparison in terms of size and cost. A discussion of the analyzed topologies regarding the obtained ratings as well as ground currents is presented. Recommendations for topological solutions complying with the application benchmark are provided.

Published in:

IEEE Transactions on Power Electronics  (Volume:28 ,  Issue: 6 )