Patent ID: 11867150
Assignee: GENERAL ELECTRIC RENOVABLES ESPANA, S.L.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A method for operating a wind turbine, the wind turbine including a rotor with rotor blades, the method comprising:
determining reliability of an azimuth measurement system in the wind turbine by:
measuring loads with load sensors during operation of the wind turbine;
based on the measured loads, determining in-plane moments generated on one or more of the blades at a rotational speed frequency of the rotor;
determining that the azimuth measurement system has reduced reliability when if the angular phase of the in-plane moments at the rotor rotational speed frequency of the rotor deviates from an angular phase measured by the azimuth measurement system by more than a first threshold value;

generating a warning signal or changing operation of the wind turbine when it is determined that the azimuth measurement system has reduced reliability.