De-Prada-Gil, M.; Diaz-Gonzalez, F.; Gomis-Bellmunt, O.; Sumper, A. "DFIG-based offshore wind power plant connected to a single VSC-HVDC operated at variable frequency: Energy yield assessment" Energy 86, pp. 311 - 322. 2015 DOI: 10.1016/j.energy.2015.04.038