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A transformerless, single DC-input, DC-AC 7-levels boost converter for PV applications

Authors :
Edgar L. Moreno-Goytia
Vicente Venegas-Rebollar
J.R. Rodriguez-Rodriguez
Source :
2011 North American Power Symposium.
Publication Year :
2011
Publisher :
IEEE, 2011.

Abstract

This paper introduces a new transformerless multilevel topology for PV arrays systems. The 7-levels structure ensembles the best characteristics of three basic topologies to obtain a step-up DC-AC converter with only a single DC input and nine power switches. The advantages of the proposed structure are a higher power density, lower harmonic distortion and higher efficiency as no transformer is needed for the grid interconnection. The topology does not require a control scheme for balancing the capacitors voltage. The cases of study clearly show the capabilities of the combination, in cascade, of a DC-DC multilevel boost converter, a DCDC multilevel buck converter and an H-bridge.

Details

Database :
OpenAIRE
Journal :
2011 North American Power Symposium
Accession number :
edsair.doi...........e08f4a1d9ce74ef6e8046ee660016dd1
Full Text :
https://doi.org/10.1109/naps.2011.6025108