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.

Provided is a rotor for a wind turbine, including: a blade, a hub, a pitch bearing being configured to support the blade rotatably about a longitudinal axis of the blade and relative to the hub, and one or more metal arcs for conducting a lightning current from the blade to the hub, the one or more metal arcs including: a first arc portion electrically and mechanically connected to the blade, a second arc portion electrically and mechanically connected to the hub, and a bent portion connecting the first and second arc portions. The metal arcs being configured such that, when the blade rotates relative to the hub, the first arc portion is shifted relative to the second arc portion and a length of the first arc portion is reduced or increased at the expense of an increase or decrease of a length of the second arc portion.

A method for detecting an electrical fault in the stator of an electric machine is provided, wherein the stator includes multiple groups of windings, wherein the windings of each group are assigned to a respective phase of the electric machine, including the steps of: determining a respective current firstly between a subgroup of one of the groups of windings and a distinct further subgroup of the same group of windings and/or secondly between a subgroup of one of the groups of windings and a neutral point, and/or thirdly between a neutral point and either a further neutral point or to a common neutral point connected to at least the neutral point and the further neutral point, evaluating a fault condition, wherein the fulfilment of the fault condition depends on the respective determined current, and outputting a fault signal to personal and/or a device when the fault condition is fulfilled.

A wind turbine includes a hub, at least one blade and at least one pitch bearing to connect the at least one blade to the hub. The at least one pitch bearing has at least an inner ring and an outer ring, and at least a rolling race. The wind turbine further includes at least a tensioning system configured to exert a radial compression force to at least a part of the outer ring of the at least one pitch bearing, thus increasing the resultant stiffness of the at least one pitch bearing.

A wind turbine control method includes: acquiring in real time a current wind direction of each upstream wind turbine in a wind farm; determining a current main wind direction to which the current wind direction of each upstream wind turbine belongs; determining, according to an association between the main wind directions of multiple upstream wind turbines and downstream wind turbines in the main wind directions, a downstream wind turbine associated with the current main wind direction of each upstream wind turbine; determining, according to an operating status and an operating parameter of the downstream wind turbine associated with the current main wind direction, a control instruction for each downstream wind turbine associated with the current main wind direction; and controlling, according to the control instruction, each downstream wind turbine associated with the current main wind direction. Also provided are a corresponding control device, a controller, and a control system.

The disclosure relates to a mounting frame, an energy storage unit, a pitch system, a wind turbine and a method. The mounting frame for mounting accumulators in a hub includes: a base having a predetermined thickness, wherein the base includes a mounting surface in a thickness direction of the base; and two or more accumulator mounting elements disposed on the mounting surface at intervals, wherein each accumulator mounting element includes a supporting assembly and a holding assembly connected to the supporting assembly, the supporting assembly is connected to the mounting surface and extends in the thickness direction, and the holding assembly is adapted to clamp and fix the accumulator such that all the accumulators in the hub are mounted to the mounting frame.

The present invention relates to a method of controlling a wind turbine comprising a tower supporting a rotor comprising a plurality of pitch-adjustable rotor blades. The method includes obtaining a movement signal indicative of a lateral movement of the tower; determining a pitch modulation signal, based on the movement signal, for actuating a rotor blade to produce a desired horizontal force component to counteract the lateral movement of the tower; determining a radial force component acting on a rotor blade; determining a phase offset parameter for the rotor blade based on the radial force component; and, transforming the pitch modulation signal into a pitch reference offset signal for the rotor blade based on the phase offset parameter.

Embodiments herein describe in-plane vibration damping techniques for MR turbines. The MR turbines can include arms that extend from a common tower and support multiple rotors. Because the rotors are disposed laterally away from the tower, side-to-side motion of the tower causes the rotors to have an angled trajectory that includes both lateral and vertical displacement. In addition, a rotor disposed on one side of the tower in MR turbine can have a very different trajectory than a rotor disposed on the opposite side of the tower. To account for the vertical displacement and the different trajectories, in one embodiment, a controller can use different phase offsets for each rotor when calculating pitch offsets for performing in-plane vibration damping. In another embodiment, the controller can use both the lateral and vertical accelerations of the rotors to identify the pitch offsets for the rotors to perform in-plane vibration damping.

The variable tilting blade twin turbine windmill device is for capturing kinetic energy from the wind and is comprised of a shaft having a plurality of central hubs connectively attached, each central hub having a plurality of wind capture arms comprising a rotating wind capture blade having a capture surface and a slicing edge that are rotated by a rotating gear and drive gear combination connectively attached to said wind capture blades enabling a rotation of said wind capture blades wherein the wind capture blades are rotated between a blade-mode to capture the wind and a knife-mode to pass with less drag resistance through the air/wind thereby enabling an increase in the ability to capture more of the energy available in the wind stream.

Provided is a method for operating a wind turbine, an associated wind turbine and a wind park. The method comprises a) providing an indicator for the occurrence of a flow separation on a pressure side of a rotor blade of a rotor of the wind turbine, and b) changing an operational management of the wind turbine using the indicator, wherein the indicator comprises a pitch angle of the rotor blade. By using the pitch angle as an indicator, a flow separation on the pressure side of the rotor blade can be effectively prevented.