Frequency restoration in insular grids with high penetration of wind power. - Markel Zubiaga; Sergio Aurtenetxea; Javier Chivite; Agurtzane Etxegarai; Esther Torres; Pablo Eguía (IECON, 2013)

Modular Multilevel Converter With Different Submodule Concepts - Part I: Capacitor Voltage Balancing Method. - Estibaliz Solas; Gonzalo Abad; Jon Andoni Barrena; Sergio Aurtenetxea; Ainhoa Carcar; Ludwik Zajac (IEEE Trans. Ind. Electron., 2013)

Modular Multilevel Converter With Different Submodule Concepts - Part II: Experimental Validation and Comparison for HVDC Application. - Estibaliz Solas; Gonzalo Abad; Jon Andoni Barrena; Sergio Aurtenetxea; Ainhoa Carcar; Ludwik Zajac (IEEE Trans. Ind. Electron., 2013)