Device for controlling humidity in wind turbines

A wind turbine comprising:

• at least one rotor blade;
• at least one aerodynamic device for influencing an airflow flowing from a leading edge section of the at least one rotor blade to a trailing edge section of the at least one rotor blade, wherein the at least one aerodynamic device is mounted at a surface of the at least one rotor blade;
• a pneumatic actuator of the at least one aerodynamic device for actuating the at least one aerodynamic device at least between a first protruded configuration and a second retracted configuration;
• a pressure supply system for operating the pneumatic actuator by means of a pressurized gas;
• wherein the pressure supply system comprises:
• a pressure generator for pressurizing the pressurized gas;
• a pressure supply line connecting the pressure generator and the pneumatic actuator for providing the pressurized gas to the pneumatic actuator, the pressure supply line comprising a pressure reservoir;
• a return line connecting the pressure generator and the pneumatic actuator for returning the pressurized gas to the pressure generator, the return line comprising a return reservoir having a negative relative pressure;
• and
• a regeneration line directly connected to the return line for connecting a source of gas to the return line;
• wherein the regeneration line includes a check valve configured for opening and putting in communication the source of gas to the return line whenever the negative relative pressure in the return reservoir decreases up to a predefined threshold value.