@article {738, title = {Design of a back-to-back NPC converter interface for wind turbines with squirrel-cage induction generator}, journal = {IEEE Tr. on Energy Conversion.}, volume = {23}, year = {2008}, month = {04/2008}, pages = {932-945}, issn = { 0885-8969}, author = {Emilio Bueno and Santiago Cobreces and F.J. Rodr{\'\i}guez and {\'A}lvaro Hern{\'a}ndez and Felipe Espinosa} }