AC-LFR concept applied to modular photovoltaic power conversion chains

H. Valderrama-Blavi*, C. Alonso, L. Martínez-Salamero, S. Singer, B. Estibals, J. Maixé-Altés

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Scopus citations


Modular inverters are presented for grid-connected photovoltaic systems based on the loss-free resistor concept. The basic module consists of a cascade connection of a buck-boost converter operating in discontinuous conduction mode and a push-pull switching inverter. The DC power of the photovoltaic module is transferred by the buck-boost stage to the push-pull converter, which transforms this power into AC power compatible with grid connection. Maximum power point tracking is achieved by matching the panel impedance at the maximum power point and the buck-boost input impedance. Two alternatives for building modular structures for N panels are investigated. Experimental and simulation results of both modular alternatives are presented.

Original languageEnglish
Pages (from-to)441-448
Number of pages8
JournalIEE Proceedings: Electric Power Applications
Issue number6
StatePublished - Nov 2002


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