Seixas, MafaldaMelício, RuiMendes, VictorPousinho, Hugo Miguel Inácio2015-05-082015-05-082014-12SEIXAS, Mafalda Maria Morais; MELÍCIO, Rui; MENDES, Victor Manuel Fernandes; POUSINHO, Hugo Miguel Inácio - Simulation of offshore wind system with two-level converters: HVDC power transmission. 16th International Power Electronics and Motion Control Conference and Exposition, PEMC 2014. ISBN 978-147992060-0. (2014), pp. 1171-1176978-147992060-0http://hdl.handle.net/10400.21/4516A new integrated mathematical model for the simulation of offshore wind energy conversion system performance is presented in this paper. The mathematical model considers an offshore variable-speed turbine in deep water equipped with a permanent magnet synchronous generator using full-power two-level converter, converting the energy of a variable frequency source in injected energy into the electric network with constant frequency, through a high voltage DC transmission submarine cable. The mathematical model for the drive train is a concentrate two mass model which incorporates the dynamic for the structure and tower due to the need to emulate the effects of the moving surface. Controller strategy considered is a proportional integral one. Also, pulse width modulation using space vector modulation supplemented with sliding mode is used for trigger the transistor of the converter. Finally, a case study is presented to access the system performance. © 2014 IEEE.engHVDCModelingOffshore wind energy conversion systemSimulationTwo-level converterjournal article10.1109/EPEPEMC.2014.6980670