Patent ID: 11920563
Assignee: SIEMENS GAMESA RENEWABLE ENERGY A/S
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  G  Y | IPC F  G

Claim 0:
1. A method of controlling operation of one or more wind turbines, the method comprising receiving a parameter value which is based on at least one sensor signal, determining a difference between the received parameter value and a predetermined value, comparing the difference with a threshold value, and if the difference is below the threshold value, operating the one or more wind turbines in a first mode of operation, if the difference is not below the threshold value, incrementing an alert counter, comparing the alert counter with an alert threshold value, operating the one or more wind turbines in a second mode of operation if the alert counter is smaller than the alert threshold value or if the alert counter exceeds the alert threshold value and the difference is decreasing, triggering an alarm if the alert counter exceeds the alert threshold value and the difference is not decreasing; wherein the first mode of operation is a normal mode of operation and the second mode of operation is a modified mode of operation and the second mode of operation a modified mode of operation; and wherein the modified mode of operation is selected from a first modified mode of operation and a second modified mode of operation in dependency of the difference.