A wind turbine is described which includes a support structure, a rotor which includes one or multiple rotor blades and which is situated on the support structure so that the rotor is freely rotatable about a rotation axis, and a generator which is connected to the rotor and which converts the wind energy into electrical energy when the rotor is rotating. The support structure includes a stationary ring on which the rotor is rotatably guided and on which the stator of the generator is situated.

A radiating component of the wind turbine is modelled as a plurality of elements, wherein each element represents a physical portion of the radiating component and at least a portion of each of the elements are acoustically coupled to one or more of the other elements. A simulation of a vibrational source located within the wind turbine is applied at an interface of the modelled radiating component. A transfer function is used to determine the transmission of vibrations from an interface with the vibrational source to the elements. Tonal noise radiated from the elements to an environment external to the wind turbine is determined based upon the transmission of vibrations from the interface through the elements. The design of the radiating component, or of a component between the radiating component and the vibrational source, is modified to reduce the tonal noise radiated from the radiating component.

A radiating component of the wind turbine is modelled as a plurality of elements, wherein each element represents a physical portion of the radiating component and at least a portion of each of the elements are acoustically coupled to one or more of the other elements. A simulation of a vibrational source located within the wind turbine is applied at an interface of the modelled radiating component. A transfer function is used to determine the transmission of vibrations from an interface with the vibrational source to the elements. Tonal noise radiated from the elements to an environment external to the wind turbine is determined based upon the transmission of vibrations from the interface through the elements. The design of the radiating component, or of a component between the radiating component and the vibrational source, is modified to reduce the tonal noise radiated from the radiating component.

A wind energy generation system includes a tower, a nacelle provided in an upper portion of the tower to be rotatable around a central axis of the tower, a hub provided in front of the nacelle to be rotatable around an axis orthogonal to the central axis, and one or more blades provided in the hub. The hub includes a hub body portion to which the blades are attached, and a fitting protruding portion that protrudes from a back surface side of the hub body portion. A fitting portion having an opening portion is provided in front of the nacelle, and the fitting protruding portion is fitted into the fitting portion from the opening portion. In the wind energy generation system, outflow of oil to the outside of the generation system can be inhibited.

A wind generator includes a revolving platform rotationally connected with a base; a tower body, where a bottom end of the tower body is connected to the revolving platform, a top end of the tower body is fixedly provided with a generator room, and a plurality of blades are rotationally connected to the generator room through a wheel hub; and the tower body is provided with at least one windward side in the circumferential direction of the tower body, and a bending stiffness of the windward side is not less than that of the remaining sides of the tower body; and a power source, where the power source is started when airflow is to the sides rather than the windward side to enable the airflow to flow to the windward side while the windward direction of the blades coincides with the airflow. A wind generator group is further provided.

A wind generator includes a revolving platform rotationally connected with a base; a tower body, where a bottom end of the tower body is connected to the revolving platform, a top end of the tower body is fixedly provided with a generator room, and a plurality of blades are rotationally connected to the generator room through a wheel hub; and the tower body is provided with at least one windward side in the circumferential direction of the tower body, and a bending stiffness of the windward side is not less than that of the remaining sides of the tower body; and a power source, where the power source is started when airflow is to the sides rather than the windward side to enable the airflow to flow to the windward side while the windward direction of the blades coincides with the airflow. A wind generator group is further provided.

A modular gearbox assembly for a wind turbine having improved up-tower serviceability includes a low-speed gear stage module, a separate, intermediate-speed gear stage module adjacent to the low-speed gear stage module, and a separate high-speed gear stage module adjacent to the intermediate-speed gear stage module. The gearbox assembly also includes a first flange removably connecting the intermediate and high-speed gear stage modules and a second flange removably connecting the intermediate and low-speed gear stage modules. Thus, the low-speed gear stage module converts a low-speed, high torque input from a rotor shaft of the wind turbine to a high-speed, low torque output for a generator of the wind turbine via the intermediate and high-speed gear stage modules. In addition, the first and second flanges allow for easy disassembly of the gear stage modules such that the various stages can be easily repaired, replaced, and/or inspected.

A wind turbine control apparatus, method and non-transitory computer-readable medium are disclosed. The wind turbine control apparatus comprises a generator connected to a wind turbine with a drive train. The drive train comprises a rotor, a low speed shaft, a gear box, a high speed shaft, and a controller module. The controller module is configured to obtain a maximum power within a large range of varying wind velocities by operating the rotor at a neural network determined optimal angular speed for the current wind velocity.

A wind turbine control apparatus, method and non-transitory computer-readable medium are disclosed. The wind turbine control apparatus comprises a generator connected to a wind turbine with a drive train. The drive train comprises a rotor, a low speed shaft, a gear box, a high speed shaft, and a controller module. The controller module is configured to obtain a maximum power within a large range of varying wind velocities by operating the rotor at a neural network determined optimal angular speed for the current wind velocity.

The present disclosure relates to wind turbines comprising a tower, a nacelle mounted on the tower, a wind turbine rotor with a plurality of blades, and a wind turbine generator operatively coupled with the wind turbine rotor. The wind turbine further comprise one or more auxiliary wind energy converters arranged with the nacelle. The present disclosure further relates to methods for providing power to an auxiliary system of a wind turbine.