Abstract: A ferromagnetic lamination, a magnetic conductive member of an electrical machine, an electrical machine having the magnetic conductive member of the electrical machine, a winding structure of an electrical machine, an electrical machine having the winding structure of the electrical machine, and an electric energy and magnetic energy conversion device are provided. The magnetic conductive member of the electrical machine includes winding slots, and multiple cavities are formed on an inner wall of each of the winding slots. With the magnetic conductive member of the electrical machine, a liquid insulating medium can be effectively retained and fixed by means of a cavity structure when an insulating treatment is performed on the magnetic conductive member of the electrical machine, and a rooted intermediate elastic base is formed at a ferromagnetic boundary after the liquid insulating medium is solidified, thereby effectively preventing the insulating medium from peeling, splitting or falling off.

Abstract: A floating body device for suppressing vibration of enclosure includes a floating body surrounding the enclosure and an excitation device which can excite the floating body to float up and down. The excitation device includes a tether connected to the floating body to prevent the floating body from falling off from the enclosure. When the floating body floats up and down, an airflow boundary layer on an outer wall of a tower can be destroyed, and a cause of vortex-induced vibration can be directly suppressed. In addition, a change of an aerodynamic configuration is obtained. The up and down floating of the floating body disrupts both upper and lower sections of a nearby flow field, thus weakening a combined action thereof, thereby preventing the vortex induced vibration of the tower.

Abstract: A bolt and a method for manufacturing the bolt are provided. The bolt includes a screw cap and a bolt bar, the bolt bar includes a positioning bar, a flexible bar and a threaded portion, the positioning bar is connected to one end of the screw cap, and the flexible bar is connected to the positioning bar and the threaded portion respectively. Wherein, an anti-shearing stand is formed on the flexible bar. The threaded portion includes standard threads and transition threads, the transition threads are formed between the flexible bar and the standard threads, and a thread height of the transition threads is smaller than a thread height of the standard threads, wherein the thread height of the standard threads keeps constant. The force distribution of the threads can be optimized, and the threads can effectively cooperate with the threads of the nut.

Abstract: A cooling system for a shafting and a control method therefor, and a wind turbine are provided. The cooling system includes a cold air supply unit and a rotating-shaft air blow box. The rotating-shaft air blow box is mounted on an inner surface of the stationary shaft and in the shape of a circular ring-shaped box, multiple first air blow openings are uniformly distributed in a surface, facing the rotating shaft, of the rotating-shaft air blow box in a circumferential direction, to blow cold air from the cold air supply unit to the rotating shaft. Each first air blow opening is in the shape of a slit to form a jet.

Abstract: A flexible molding process and system for a magnetic pole protective layer. The molding process is as follows: assembling magnet steels at respective positions on a side wall surface of a magnetic yoke, laying a reinforcing material and a vacuum bag in the listed sequence on the magnet steel and the side wall surface of the magnetic yoke, wherein the vacuum bag, the magnet steels and the side wall surface of the magnetic yoke form a sealed system; performing an impregnation process, including vacuumizing the sealed system to allow the impregnation liquid to be injected into the sealed system, to achieve infiltration and impregnation; heating the sealed system and/or emitting ultrasonic waves to the sealed system while performing the impregnation process; and performing a curing process after the impregnation process, wherein the impregnation liquid and the reinforcing material are cured to form a protective layer.

Abstract: Disclosed are a conductive ring assembly, a conductive device and a wind turbine. The conductive ring assembly includes a sun gear, a ring gear and one or more planet gear. The sun gear is located in the ring gear, and the sun gear and the ring gear are coaxially arranged. The one or more planet gear is engaged between the sun gear and the ring gear. The planet gear is conducted with the sun gear and the ring gear at the same time, so that an electrical signal is transmitted between the sun gear and the ring gear by means of the one or more planet gear. The conductive ring assembly uses a planet gear structure for communication data transmission to improve the interference resistance of the conductive ring assembly.

Abstract: Provided are a device and a method for extracting a terrain boundary, including: a grid creating module configured to divide a region which is determined based on measured contour line data of a target terrain, to form a regular grid including multiple grid units; a data analyzing module configured to assign a first standard value or a second standard value to each of the multiple grid units based on the number of elevation points included in the grid unit, to form a final grid region, where the final grid region is a region including all grid units having the first standard value; and a boundary extracting module configured to extract a terrain boundary based on the final grid region.

Abstract: A video monitoring method and system for a blade of a wind turbine are provided. The method includes: calculating a pan value and a tilt value based on each of a plurality of circular arc angles when the blade of the wind turbine is in a stationary state, wherein the plurality of circular arc angles are set based on a circular arc curve on a rotational plane of the blade, which is formed with a first point as a center and a first distance as a radius; and setting the pan value and the tilt value of a video camera to the calculated pan value and tilt value, respectively, to capture the blade.

Abstract: The present invention provides a power control method, device and system for a wind power station. The power control method comprises: obtaining running state data of the wind power station and a grid connection point in real time; determining whether the state of the grid connection point meets conditions of secondary frequency modulation according to the running state data; if it is determined that the state of the grid connection point meets the conditions of secondary frequency modulation, determining a limited power instruction value according to a pre-obtained theoretical power value of the wind power station, a given value of automatic power generation control, and a standby active power value reserved for primary frequency modulation; and generating and sending an instruction used for controlling the active power of the wind generating set of the wind power station according to the limited power instruction value.

Abstract: A correction method and a correction apparatus for a predicted wind speed of a wind farm is provided according to the present disclosure. The correction method includes: establishing wind speed deviation matrixes of a plurality of existing wind farms respectively; establishing a wind speed deviation correction model library based on the plurality of wind speed deviation matrixes of the existing wind farms; determining relevant parameters of the target wind farm, determining a matched wind speed deviation correction model in the wind speed deviation correction model library based on the relevant parameters, and correcting the predicted wind speed of the target wind farm based on the determined wind speed deviation correction model.

Abstract: A method and device for controlling output power in a primary frequency modulation process of a wind turbine are provided by the present disclosure. The method includes predicting a rotational speed of the wind turbine; determining frequency modulation remaining time based on the predicted rotational speed, the frequency modulation remaining time being time for which the wind turbine is able to continue to output frequency modulation power as the output power used for the primary frequency modulation without affecting a recovery of the wind turbine after the primary frequency modulation; controlling the output power based on the determined frequency modulation remaining time.

Abstract: A magnetic pole part, a fiber-reinforced material, a test apparatus therefor, and a control method for the test apparatus. The test apparatus comprises: a container provided with an adhesive agent container therein for containing an adhesive agent; a positioning member for positioning a member to be tested inside the container and partially inside the adhesive agent container; an adhesive agent heating member 912) for heating the adhesive agent; and an adhesive agent temperature sensor for measuring the temperature of the adhesive agent; a controller for turning on or off the adhesive agent heating member according to a temperature signal detected by the adhesive temperature sensor so as to keep the adhesive agent in the adhesive agent container at a preset temperature.

Abstract: A yaw control method for a wind turbine, comprising the following steps: acquiring the current or future ambient wind speed and yaw angle of a wind turbine; estimating a power change value of the wind turbine caused by performing a yaw action on the basis of the yaw angle at the ambient wind speed; determining a yaw control strategy of the wind turbine according to the estimated power change value; transmitting a command to the wind turbine, so as to enable the wind turbine to perform the determined yaw control strategy. In addition, also provided are a device and system for performing the control method. The yaw control method, device and system can lower the loss of the wind turbine, reduce the overall load under certain extreme working conditions, and can also exploit the power generation potential of the wind turbine.

Abstract: A generator, a heat exchange device for a shaft system thereof, and a wind turbine are provided. The heat exchange device includes a flexible cavity for allowing a cooling medium to input. The flexible cavity is located on an inner wall of the generator rotation shaft, and is cooled by a generator bearing in the generator shaft system. After the cooling medium is injected into the flexible cavity, the cooling environment can be created at the inner wall position of the generator rotation shaft so as to provide a heat-dissipation channel for the generator bearing enclosed between the generator rotation shaft and a generator fixed shaft, thereby achieving good cooling effect.

Abstract: Provided are a method, a device, and system for controlling an operation of a generator, where the generator includes at least two power generation and transmission loops. The method includes: upon detecting the failure of any one of the at least two power generation and transmission loops, determining whether a preset condition for entering a partial power operation mode is satisfied; and when it is determined that the preset condition is satisfied, controlling at least one non-malfunctioning power generation and transmission loop of the at least two power generation and transmission loops to enter an operation mode, and controlling the malfunctioning power generation and transmission loop to enter a shutdown state, so that the generator enters the partial power operation mode.

Abstract: A fault handling method and apparatus for a wind power generator set, and a computer readable storage medium. The fault handling method comprises: dividing faults of a wind power generator set into groups according to a target protection object, each group of faults including a plurality of process faults associated with the target protection object and a target fault of the target protection object (101); if any one of the plurality of process faults in the same group as the target fault satisfies a corresponding process fault trigger condition and the target fault does not satisfy the corresponding target fault trigger condition, performing a fault-tolerant operation on the wind power generator set (102); if the target fault satisfies the corresponding target fault trigger condition, selecting, from the triggered process faults in the same group as the target fault, the process fault having the highest degree of association as a real fault that has caused shut-down of the wind power generator set (202).

Abstract: A centering fastener, a method for manufacturing the centering fastener, a method for using the centering fastener and a wind turbine are provided. The centering fastener includes a connecting body, a buffer lining and a centering member, the connecting body is a columnar body and includes a connecting portion and a non-threaded portion; the buffer lining has a cylindrical shape and covers at least part of the non-threaded portion; the centering member covers an outer surface of the buffer lining, and, at least at a portion corresponding to the buffer lining, the non-threaded portion is separated from the centering member.

Abstract: An enclosure having an outer surface with a vortex-induced vibration suppression function is provided. The outer surface of the enclosure is provided with a plurality of annular recesses surrounding the enclosure, such that alternately concave and convex annular recesses and annular bosses configured for disrupting a boundary layer of a laminar flow are formed on the outer surface of the enclosure. An outer surface of the annular boss is provided with a plurality of air guiding grooves, and the plurality of air guiding grooves are distributed in a circumferential direction of the annular boss. The air guiding grooves are inclined upward or downward, such that part of an upwind incoming flow flowing to the annular boss can be guided into the annular recesses adjacent to the annular boss via the air guiding grooves. With the convex-concave outer surface, the cause of formation of the vortex-induced vibration can be prevented.

Abstract: A method and device for distributing active power for a wind farm are provided. The method includes: calculating a current total active power variation of the wind farm according to a current frequency variation of a power grid; distributing a current single-unit active power variation to each wind turbine according to a first preset strategy based on the current total active power variation and a single-unit storage energy value in a case that the current total active power variation is greater than zero; distributing the current single-unit active power variation to each wind turbine according to the first preset strategy based on the current total active power variation and a lowerable power value in a case that the current total active power variation is smaller than zero; and controlling each wind turbine to adjust its operating state.

Abstract: A method and device for controlling output power in a primary frequency modulation process of a wind turbine are provided by the present disclosure. The method includes predicting a rotational speed of the wind turbine; determining frequency modulation remaining time based on the predicted rotational speed, the frequency modulation remaining time being time for which the wind turbine is able to continue to output frequency modulation power as the output power used for the primary frequency modulation without affecting a recovery of the wind turbine after the primary frequency modulation; controlling the output power based on the determined frequency modulation remaining time.