Wind Turbines

An important part of wind turbine efficiency is pitch control. The input power of the turbine is controlled by dynamically adjusting the angle of the rotor blade. A control system uses independent hydraulic actuators to turn each individual blade at an angle between 0 and 90 degrees.

Under low wind conditions, the angle of the turbine blades is adjusted to achieve maximum efficiency and maintain constant electric power output. Since variations as small as a single degree can change the aerodynamics, accurate position feedback provided by MTS Sensors is critical.

When the wind velocity exceeds the maximum permissible generator output, the blades are adjusted away from the optimum position to reduce the aerodynamic efficiency and maintain a suitable rotational velocity. Actively controlling the input power not only enables peak efficiency but also reduces the stress on the rotor, tower, and foundation for increased safety and longevity.