Modulation Techniques to Eliminate Leakage Currents in Transformerless Three-Phase Photovoltaic Systems. - Marcelo Cabral Cavalcanti; Kleber C. Oliveira; Alexandre M. Farias; Francisco A. S. Neves; Gustavo Medeiros de Souza Azevedo; Felipe C. Camboim (IEEE Trans. Ind. Electron., 2010)