Wind turbine power curves are a useful tool to monitor turbine performance and efficiency but are not always an ideal method for assessing the accuracy of the wind sensor.
Many other factors affect the power output of a turbine and different wind speeds and directions. These include topography, wind shear and veer effects, wind sector (directional) implications, air density variations, wind farm layout and performance of the other turbine components involved in converting wind energy to electricity.
Our recommendation is that every wind turbine should have two wind sensors so that there is always a second value to compare against. Having this redundancy will maintain turbine operation in the event of a sensor failure.