An APU has a gas turbine engine and a starter generator to be selectively driven by the gas turbine engine. A sensor senses windmilling of components associated with the starter generator. A lock feature limits rotation within the starter generator when windmilling is sensed. A method of operation is also disclosed.

Aspects of the present invention relate to a computer-implemented method for predicting energy production losses associated with high wind hysteresis control of a wind turbine generator. The method comprises: determining a distribution of wind speeds; determining a high wind hysteresis band that comprises wind speed values between an upper threshold and a lower threshold; and predicting energy production loss due to the high wind hysteresis control. The prediction includes: determining a high wind factor corresponding to a probability that the wind speeds in the hysteresis band occur when the generator is shut off by the high wind hysteresis control, determining, based on the distribution and power data, an energy value associated with the wind speeds falling within the hysteresis band over a predetermined time period; and determining the energy production loss by applying the high wind factor to the determined energy value.

The invention relates to a method of controlling a wind turbine, the wind turbine comprising wind turbine blades attached to a rotor hub and a control system for pitching the blades relative to the rotor hub. The method comprises determining a wind speed and providing a normal pitch mode of operation to control the output power of the wind turbine, where the pitch mode of operation comprises pitch reference values in dependence of the wind speed. The output power of the turbine is controlled according to the normal pitch mode of operation as a function of the wind speed if the wind speed is lower than a first upper level wind speed threshold, and according to a modified mode of operation if the wind speed exceeds the first upper level threshold wind speed, wherein the modified mode of operation comprises decreasing the output power according to a de-rating function which is a function of time. The invention further relates to a control system for controlling a wind turbine according to the above mentioned control method.

A method for operating a wind turbine is provided. The wind turbine includes a rotor adapted to rotate at an optimal speed. The method includes determining a turbulence parameter; and operating the wind turbine at a speed that is increased by a speed deviation amount as compared to the optimal speed. The speed deviation amount is dependent on the turbulence parameter. A wind turbine (100) having a controller (202) for controlling the wind turbine according to the disclosed method is also provided.

A method for controlling wind turbines. Incident signal data is obtained from wind turbines and fed to an artificial intelligence (AI) model in order to identify patterns in the incident signals generated by the wind turbines. One or more actions are associated to the identified patterns, based on identified actions performed by the wind turbines in response to the generated incident signals. During operation of the wind turbines, one or more incident signals from one or more wind turbines are detected and compared to patterns identified by the AI model. In the case that the detected incident signal(s) match(es) at least one of the identified patterns, the wind turbine(s) are controlled by performing the action(s) associated with the matching pattern(s).

A method and a device for controlling power generation of a wind power generation unit based on the Internet of Things are provide. According to the method, at least one of a first electric power generation power control amount component, a second electric power control amount component, and a third electric power control amount component is controlled. An expected adjustment value of electric power is determined, so that at least one of a gearbox step-up ratio, an electromagnetic torque of a generator, and a rotation speed of a wind wheel can be calculated to adjust a data security adjustment and control amount of output power of an offshore wind power generator set. The electric power generation power of the wind turbine generator set is adjusted to be the difference between the current electric power generation power and the expected adjustment value of the electric power generation power.

A method and device for controlling a wind turbine and a storage medium. The method includes obtaining a mapping of the wind turbine; determining a starting power for starting an advance pitch control based on the mapping of the wind turbine; in response to a rotation speed of the wind turbine reaching a first rated rotation speed and a power of the wind turbine reaching the starting power, increasing a motor torque and increasing a pitch angle to make the hub thrust of the turbine change by following the limit boundary of hub thrust; and increasing the pitch angle to maintain the rotation speed of the wind turbine at the first rated rotation speed until a target wind speed is reached, in response to the power of the wind turbine being increased to the exceeded power.