Abstract: A control system to improve the production of a variable speed wind turbine comprising control devices for a standard regulation tracking a power vs. generator speed curve that also uses an alternative regulation for optimizing the energy production along determinate time periods Tb for compensating previous energy losses at a higher power Pb than the power determined by the standard regulation, the alternative regulation being based on a continuous calculation of the accumulated lost energy ALE as the energy lost with respect to the maximum allowed energy production according to the standard regulation and the fixation of the higher power Pb and a setting of the duration of the time periods Tb being compatible with wind turbine electrical or mechanical limitations. A wind turbine controlled by the method.

Abstract: Method of operation of a variable speed wind turbine (11) comprising control means for a standard regulation tracking a power vs. generator speed curve (21) that also uses an alternative regulation for optimizing the energy production along determinate time periods Tb for compensating previous energy losses at a higher power Pb than the power determined by said standard regulation, said alternative regulation being based on a continuous calculation of the accumulated lost energy ALE as the energy lost with respect to the maximum allowed energy production according to the standard regulation and on a setting of said higher power Pb and a setting of the duration of said time periods Tb being compatible with wind turbine electrical or mechanical limitations. The invención also refers to a wind turbine controlled by said method.