The present disclosure relates to a method of operating a wind turbine, a corresponding wind turbine, a method of controlling a wind farm and a corresponding wind farm. The method comprises the steps of: determining a target maximum active power to be fed by the wind turbine into a power grid, in particular into an electricity power grid; monitoring a current active power fed from the wind turbine into the power grid; determining a reference time period corresponding to the determined target maximum active power; deriving an average of the active power fed from the wind turbine into the power grid during the reference time period; comparing the average of the active power with the target maximum active power; and operating the wind turbine at a set operating point permitting active power above the target maximum active power in case the average of the active power is below the target maximum active power.

A system and method are provided for operating a power generating asset coupled to an electrical grid. Accordingly, a controller receives an environmental data set indicative of at least one environmental variable projected to affect the power generating asset over a plurality of potential modeling intervals. The controller then determines the variability of the environmental data set and a corresponding modeling-confidence level at each of the potential modeling intervals based on the variability. A modeling interval is thus selected corresponding to a desired modeling-confidence level. A computer-implemented model is employed to predict a future power profile for the power generating asset over the selected modeling interval. The future power profile is indicative of a power-delivery capacity of the power generating asset at each of a plurality of time intervals of the modeling interval. Based, at least in part, on the future power profile, the controller determines an obligated-power-production schedule for the power generating asset over the modeling interval. The obligated-power-production schedule corresponds to a power production agreement with the electrical grid. In accordance with the obligated-power-production schedule, the controller modifies at least one setpoint of the power generating asset to deliver electrical power to the electrical grid.

A material (such as potassium hydroxide or ammonia) capable of reacting with ambient carbon dioxide to produce fertilizer is placed in the path of ambient air movement. Desirably the material is associated with a fabric which in turn is associated with a vane of a vertical axis wind turbine, the turbine performing useful work as well as supporting the material which produces a fertilizer. A misting system controlled by a controller may automatically apply a water mist to the material if the humidity is below a predetermined level. The fabric with produced nitrogen and/or potassium fertilizer may be placed directly into contact with soil, or shredded first, or burned to produce energy and an ash (and the ash applied to the soil). The wind turbine may have a convenient, versatile mounting system with three adjustable legs supporting a central component, and the spokes of the wind turbine may be slotted for easy assembly with vanes.

A material (such as potassium hydroxide or ammonia) capable of reacting with ambient carbon dioxide to produce fertilizer is placed in the path of ambient air movement. Desirably the material is associated with a fabric which in turn is associated with a vane of a vertical axis wind turbine, the turbine performing useful work as well as supporting the material which produces a fertilizer. A misting system controlled by a controller may automatically apply a water mist to the material if the humidity is below a predetermined level. The fabric with produced nitrogen and/or potassium fertilizer may be placed directly into contact with soil, or shredded first, or burned to produce energy and an ash (and the ash applied to the soil). The wind turbine may have a convenient, versatile mounting system with three adjustable legs supporting a central component, and the spokes of the wind turbine may be slotted for easy assembly with vanes.

A stator segment for the stator or the rotor of an electrical machine is provided including: two end teeth at two respective circumferential ends, a plurality of N intermediate teeth, N being an integer greater than 1, a plurality of N+1 slots circumferentially distributed between the two end teeth, each pair of circumferentially adjacent intermediate teeth having a slot interposed therebetween, a slot being provided between each end tooth and a respective circumferentially adjacent intermediate tooth, at least one 2-pitch coil, the 2-pitch coils being in the number of N-1 and extending between an i-th slot and a (i+2)-th slot, the slots being progressively counted from one to the other of the two circumferential ends, i being an integer between 1 and N−1.

A stator segment for the stator or the rotor of an electrical machine is provided including: two end teeth at two respective circumferential ends, a plurality of N intermediate teeth, N being an integer greater than 1, a plurality of N+1 slots circumferentially distributed between the two end teeth, each pair of circumferentially adjacent intermediate teeth having a slot interposed therebetween, a slot being provided between each end tooth and a respective circumferentially adjacent intermediate tooth, at least one 2-pitch coil, the 2-pitch coils being in the number of N-1 and extending between an i-th slot and a (i+2)-th slot, the slots being progressively counted from one to the other of the two circumferential ends, i being an integer between 1 and N−1.

A stator of an electrical machine is provided including a body axially extending along the longitudinal axis between two opposite axial ends, the body radially extending perpendicular to the longitudinal axis between a radially inner surface and a radially outer surface, wherein at least one of the two opposite axial ends includes a plate inclined with respect to the longitudinal axis of an angle greater than 0° and lower than 90°.

A stator of an electrical machine is provided including a body axially extending along the longitudinal axis between two opposite axial ends, the body radially extending perpendicular to the longitudinal axis between a radially inner surface and a radially outer surface, wherein at least one of the two opposite axial ends includes a plate inclined with respect to the longitudinal axis of an angle greater than 0° and lower than 90°.

The present disclosure discloses an offshore wind farm low-frequency alternating-current uncontrolled rectification electric power transmission system, comprising an onshore converter station and an offshore alternating-current system. The offshore alternating-current system comprises wind turbine generators, alternating-current submarine cables, a confluence bus, and offshore booster stations; the onshore converter station comprises a wind field side alternating-current bus, an alternating-current system side alternating-current bus, an alternating-current filter, an energy dissipation device, a rectifier, and a converter; the rectifier is composed of a three-phase six-pulse uncontrolled rectifier bridge, and the converter may be an MMC or an LCC; the rated frequency of the offshore alternating-current system is selected to be close to 10 Hz.

The invention relates to the shaftless horizontal axis wind turbine for generating electricity from the flow of fluid. The major components of the shaftless horizontal axis wind turbine consist of a stator and a rotor. The major components of the stator consist of a set of copper coils installed along a circular circumference of the stator frame and electrically connected as the Star connection (3-phase) circuit. The major components of the rotor consist of at least a set of the turbine blade, roller, and magnet set. The turbine blade has optimized an obtuse angle (θ.sub.T) of the turbine blade holder and a rotation angle (θ.sub.R) between the turbine blade holder and turbine blade to create the open channel in the middle of the shaftless horizontal axis wind turbine, which is shaped like a nozzle without shaft at the center of horizontal axis wind turbine.