Abstract: The present invention provides a novel floating and renewable energy-powered desalination vessel, which also functions as a wind turbine generator and wave energy generator platform. With energy derived from the wind and waves, the vessel performs reverse osmosis within a vertically positioned cylindrical section extending below a buoyancy chamber. The cylindrical section contains reverse osmosis membranes located above a seawater screening and filtration system, which serve as ballast. The entire vessel and power systems are configured to have the center of mass below the center of buoyancy, forming a vertically stable floating structure with minimum pitch, roll, and wave heave in high sea states. The electric power generated is utilized internally to produce desalinated water or hydrogen from the desalinated water's electrolysis, power an onboard data center, or power delivery to a shoreside power grid.

Abstract: A control system for a power generation system includes a generator coupled to a turbine via a shaft. The control system includes a memory storing instructions. The control system also includes a processor coupled to the memory and configured to execute the instructions. When the instructions are executed it causes the processor to receive a direct current (DC)-link voltage from an automatic voltage regulator (AVR), wherein the AVR is configured to control voltage characteristics of the generator, and to determine a speed of the generator based on the DC-link voltage.

Abstract: A energy supply system with at least a renewable energy generator and a standard generator driven by fossil energy and a dump load system, which could be a battery. The renewable generator may be limited in it's energy production when the load is to low. The generator may be feed with energy, i.e. driven in motor load to take over short term surplus energy. The system may contribute to stabilization of grid fluctuations with its mechanical inertia from the rotating alternator in the engine stopped mode and with the engine in other modes.

Abstract: A modular wind turbine system and a method of use thereof are provided. The system comprises: a mounting frame; a fixed toroidal support structure attached to the mounting frame, the toroidal support structure having a concave portion and a convex portion; a wind turbine located proximal to the concave portion of the toroidal support structure, wherein the wind turbine travels about at least a portion of the concave portion of the toroidal support structure; and a first baffle, wherein the first baffle extends about the portion of the concave portion of the toroidal support structure about which the first turbine travels, wherein the baffle surrounds a portion of the wind turbine opposite the fixed toroidal support structure, and wherein the baffle includes at least one component selectively variably adjustable so as to vary the force, direction, or disruption of flow of fluid thereby, relative to the wind turbine.

Abstract: Provided is a method of identification and compensation of an inherent deviation of a yaw error of a wind turbine based on a true power curve. The method, based on a wind turbine data acquisition and monitoring control (SCADA) system includes a wind speed, an active power, and a yaw error and so on, runs data in real-time, first pre-processes the data to a certain degree, and then divides a power curve data according to a certain yaw error interval, fits the power curves according to different yaw error intervals through a true power curve fitting flow in connection with an outlier discrimination method, further quantitatively analyzes the different power curves and determines an interval scope of the yaw error inherent deviation value based on an interval determination criterion, and finally compensates the identified inherent deviation value to a yaw error measurement value.

Abstract: A hybrid power backup system having at least one battery for powering at least one external load; at least one capacitor for powering a controller configured to control power provided from the battery to the at least one external load and to control discharge/charge cycles of the battery.

Abstract: Provided is a method for feeding electrical power into an electrical supply network having a network voltage with a network frequency by means of a converter-based generator, in particular by means of a wind power system, comprising the following steps: estimating a converter proportion, representing a ratio of power fed in by means of converters to total power fed in, of a network section of the electrical supply network, feeding electrical power into the electrical supply network in a normal mode, and activating at least one support control for supporting the electrical supply network. The activating is effected depending on the converter proportion, the at least one support control is adjustable in each case by way of a degree of activation, and the degree of activation of the at least one support control is dependent in each case on the estimated converter proportion.

Abstract: The present application relates to a method for controlling a power system connected to a power grid, including: receiving a reactive power instruction and a measured reactive power from a generator; generating a reactive power error signal based on the difference between the reactive power instruction and the measured reactive power; receiving the reactive power error signal; generating a voltage instruction based on reactive power error signal; generating a voltage droop signal based on a reference reactance and a voltage at a point of common coupling; generating a voltage error signal according to at least one of the voltage instruction or the measured terminal voltage of the generator and the voltage droop signal; and producing a reactive current instruction for the converter power path based on the voltage error signal. The present application also discloses a control system for a power system connected to a power grid and a wind farm.

Abstract: Systems and methods to generate electrical power through a direct drive wind turbine. In one aspect, the system uses a diffuser cuff surrounding a counter rotating turbine operating inside a streamlined center body, the counter rotating turbine using a generator with an iron sandwich core. The main wind turbine blades are attached to a barrel stave that increases generator efficiency and distributes loading through the tower support structure.

Abstract: Aspects of the present invention relate to controlling a renewable energy power plant comprising a plurality of wind turbine generators (WTG)s and an energy storage system (ESS). A method includes: controlling the plurality of WTGs to stop generating power, and thereby to enter a non-exporting mode of operation of the renewable energy power plant, during which one or more auxiliary systems of the renewable energy power plant are powered to maintain at least one of the plurality of WTGs in a standby state, operable to start generating power upon demand; wherein the one or more auxiliary systems are powered during the non-exporting mode of operation.

Abstract: The invention relates to a method for operating a wind turbine which comprises a power generator, a generator side converter, a grid side converter, a DC link electrically connected to an output of the generator side converter and an input of the grid side converter. The method comprises monitoring a wind turbine signal for detection of an operational condition which requires an increase of an output voltage of the grid side converter, upon detection of the operational condition, initiate an over-modulation mode wherein the grid side converter is operated with a modulation index in an over-modulation range, and upon the detection of the operational condition, initiate a DC-voltage adjustment mode wherein the a DC-voltage of the DC link is increased from a first voltage level towards a second voltage level.

Abstract: A wind turbine control method involves calculating a value indicative of a misalignment ? of the wind turbine on a basis of at least one signal indicative of wind direction. A determination is made as to whether the value indicative of the misalignment ? of the wind turbine is above a first predefined misalignment threshold value. A value of a blade pitch angle ? is adapted. At least one of the blades of the wind turbine is rotated about its longitudinal axis on the basis of the adapted value of the blade pitch angle ?.

Abstract: A method for operating a wind turbine generator connected to a power network to account for recurring voltage faults on the power network caused by automatic reclosure of at least one circuit breaker following a short-circuit. The method comprises: identifying a deviation of voltage level of the power network from a normal operational voltage level of the network; determining that the identified deviation fulfils criteria for automatic reclosure; and operating the wind turbine generator in a recurring fault mode if automatic reclosure criteria are fulfilled. When operating the wind turbine generator in recurring fault mode, the method comprises: monitoring the recovery of the voltage level from the deviation; categorising the recovery of the voltage as one of at least a strong recovery or a weak recovery; and implementing a ride-through protocol according to the category of recovery.

Abstract: The present application relates to a method for controlling a power system connected to a power grid, including: receiving a reactive power instruction and a measured reactive power from a generator; generating a reactive power error signal based on the difference between the reactive power instruction and the measured reactive power; receiving the reactive power error signal; generating a voltage instruction based on reactive power error signal; generating a voltage droop signal based on a reference reactance and a voltage at a point of common coupling; generating a voltage error signal according to at least one of the voltage instruction or the measured terminal voltage of the generator and the voltage droop signal; and producing a reactive current instruction for the converter power path based on the voltage error signal. The present application also discloses a control system for a power system connected to a power grid and a wind farm.

Abstract: A test and control apparatus, system and method for a wind farm, are provided. The test and control apparatus includes a first communication interface, a second communication interface, and a processor card. The processor card receives, via the first communication interface, a frequency regulation instruction issued by the grid scheduling server, receives operation information of the wind power generation unit via the second communication interface, and calculates, based on the operation information of the wind power generation unit, a first frequency regulation capability of the wind power generation unit performing a frequency regulation without using the first energy storage battery. The processor card sends the frequency regulation instruction to the wind power generation unit without using the first energy storage battery, in a case that the first frequency regulation capability of the wind power generation unit satisfies a requirement of the frequency regulation instruction.

Abstract: A method for feeding electrical power into an electrical, three-phase supply network by means of an inverter device, wherein the electrical supply network has a three-phase line voltage with a first, second and third line voltage phase, comprising the steps: feeding the electrical power during normal operation if a fault-free operation has been identified for the electrical supply network, wherein during normal operation a positive sequence voltage and optionally a negative sequence voltage is recorded from the line voltage and a reactive current is specified at least depending on the positive sequence voltage and optionally depending on the negative sequence voltage, and changing to a fault operation if a voltage change in the line voltage meets a predetermined fault criterion, in particular if the voltage change exceeds a predeterminable minimum amount of change or a minimum amount of change gradient, wherein during the fault operation, at least directly after the change, the reactive current is specified d

Abstract: Provided is a control circuit of a converter, in particular a power converter of a wind power installation, configured to control the converter in such a way that the converter emulates a behavior of a synchronous machine. The control circuit includes a power module for calculating a power change depending on a detected power and a correction module for setting a power set point, in particular for the converter, depending on the calculated power change.

Abstract: A system and method are provided for operating a power generating asset. Accordingly, a controller detects a fault condition impacting the power generating asset. The controller then determines whether the fault condition is occurring in the power generating asset or is occurring in the power grid. When the fault condition is occurring in the power generating asset, a first response control scheme is implemented. However, when the fault condition is occurring in the power grid, a second response control scheme is implemented. The response control schemes include a first current threshold and a second current threshold respectively, with first current threshold being less than the second current threshold. Additionally, a control action is implemented in response to an approach of a current to the respective current threshold.

Abstract: Provided is a detecting device and a method for detecting a fault in a transformer of a wind turbine, wherein the transformer transforms a lower voltage, which is output from a generator of the wind turbine to a low voltage side of the transformer, to a higher voltage, which is output from the transformer at a high voltage side, the detecting device including: a voltage detection device configured to detect a voltage at a first node at the low voltage side of the transformer; a current detection device configured to detect a current at a second node at the high voltage side of the transformer. The detecting device is configured to detect the fault in the transformer based on the detected voltage and the detected current.

Abstract: A system contains a double fed induction machine having a stator and a rotor, a fly wheel coupled to the rotor, and a control device for providing a rotor voltage and a rotor current to the rotor. The control device is connected to the rotor and the stator and is capable of generating the rotor voltage and rotor current in response to an electrical signal that is applied to the stator. The control device has a multilevel converter and a control unit for controlling the multilevel converter.

Abstract: A pitch control method and system of a symmetrical-airfoil vertical axis wind turbine collects data by an anemometer, an anemoscope and an angle sensor, outputs an optimum pitch angle based on a control law of a pitch angle and controls the pitch angle to be the optimum pitch angle through a pitch control actuator. In addition to input variables of the control law such as a wind velocity vin and a blade azimuth angle ?, constants such as a rotation radius R, a rotation velocity ? of the blade and aerodynamic coefficients c1, c2 and c3 are also related. A Reynolds number has little influence on three aerodynamic coefficients c1, c2 and c3. The pitch actuator controls the adjustment rods to realize the automatic pitch control of the blades. An expression of the control law of the pitch is concise, the calculation time is short, and a response speed is fast.

Abstract: Embodiments herein describe a hydraulic pitch system where a velocity (e.g., the velocity of a hydraulic cylinder or the piston rod in the cylinder) is fed forward and combined with a setting outputted by a pitch controller. The velocity of the hydraulic cylinder is derived from the reference pitch angle or a continuous pitch signal (e.g., a cyclic pitch or ramp rate) in the control system. In either case, the velocity can be determined by monitoring the change in the reference pitch angle or the continuous pitch signal. Using a gain control, the velocity is converted into a position setting of the hydraulic pitch system (e.g., a spool setting in a valve) which is combined with another position setting generated by the pitch controller.

Abstract: A method of controlling a wind turbine for the avoidance of edgewise vibrations. The method comprises the steps of determining a whirling mode frequency of a rotor blade of the wind turbine; determining a rotational frequency of the rotor blade corresponding to the speed of the rotor blade; determining a threshold value for the whirling mode frequency based on the rotational frequency; and, reducing the speed of the rotor blade if the whirling mode frequency substantially equals or is less than the threshold value.

Abstract: A method for feeding electric power into an electrical supply grid by means of a local feed unit. The feed unit is connected to a grid link point connected to a transformer point directly or via a supply connection. The transformer point is connected to a grid section via a transformer. The method includes feeding electrical real power into the electrical supply grid at the grid link point, feeding electrical reactive power into the electrical supply grid at the grid link point, detecting a change to be made in the real power to be fed in, and changing the fed-in real power in accordance with the detected change to be made. The method includes limiting a change in the fed-in reactive power over time when changing the fed-in real power and/or immediately thereafter or temporarily activating voltage control on the basis of the change in the fed-in real power.

Abstract: A power plant-connected energy storage system maintains frequency quality of power generated and supplied by a power plant. The system includes an electric energy storage unit that includes two or more batteries of different types and is configured to be charged or discharged to improve frequency quality of power output from the power plant; and a power conditioner configured to control of the power output from the power plant and to control charge and discharge at least one of the two or more batteries in accordance with the control of the power output from the power plant. The two or more batteries include a short cycle battery having a relatively short charge/discharge cycle and a long cycle battery having a relatively long charge/discharge cycle.

Abstract: A vertical wind turbine that includes a plurality of vertical vanes which can be rotated independently of one another about a respective vane rotational axis by a motor and which are mounted on a common circular path in a rotatable manner about a vertical rotor rotational axis. A method for operating a vertical wind turbine. Angular positions are specified for vertical wind turbine vanes which are mounted in a rotatable manner about a respective vertical rotor rotational axis and which can be rotated about a respective vane rotational axis by a motor. The vertical wind turbine is operated in a particularly efficient and material-preserving manner in that the angular positions of the vanes are specified by at least one respective pitch motor which at least partly supports the respective vane.

Abstract: A wind turbine offshore installation method of installing a wind turbine using a semi-submersible type floating substructure includes: a step of towing the semi-submersible type floating substructure on which the wind turbine is erected to an installation target site on a sea; and a step of coupling the wind turbine and a spar type floating substructure for supporting the wind turbine on the sea at the installation target site to install the wind turbine on the sea.

Abstract: Methods and systems for operating a stable platform in a far-offshore deep-sea environment. The platform can advantageously be a wind power generation station. A structural framework carries (for example) the wind turbine in an elevated position. Multiple points on the floating structure are connected both to a surface float and to a deep mass (e.g. an enclosed volume of seawater).

Abstract: A power control method and apparatus for a wind power generator. The power control method comprises: predicting, according to historical wind resource data, wind resource data within a predetermined future time period (S10); estimating, according to the remaining design lifetime of a wind power generator, the maximum design lifetime allowed to be consumed within the predetermined future time period (S20); determining, according to the predicted wind resource data and the estimated maximum design lifetime, optimal output powers of the wind power generator in respective wind velocity ranges within the predetermined future time period (S30); and controlling operation of the wind power generator according to the determined optimal output powers of the wind power generator in the respective wind velocity ranges within the predetermined future time period (S40).

Abstract: The invention relates to a single-point mooring wind turbine having a rotor arranged on a tower, characterized by a design counteracting sway of the wind turbine caused by the rotor torque.

Abstract: A method for controlling a wind farm, which is operated by means of a wind farm control unit and comprises a multiplicity of wind power installations having wind power installation controllers and being connected to one another via a common wind farm grid, which is connected to an electrical power supply grid of a grid operator by means of a wind farm transformer, comprising the following steps: reception of at least one fault bit at the wind farm control unit, in particular at least one fault bit of the grid operator, deactivation of all external setpoint value specifications at the wind farm control unit apart from those of the grid operator after reception of the fault bit, activation of a closed-loop fault case control implemented in the wind farm control unit after successful deactivation of all external setpoint value specifications apart from those of the grid operator.

Abstract: A method and device which operates to record and evaluate an output of electrical energy of a hybrid power plant, wherein, in accordance with time and/or load, at least one expected generable and usable energy contribution resulting from the utilization of renewable energy sources and one expected energy contribution resulting from the utilization of convention energy carriers are recorded with different tariffs.

Abstract: A method and apparatus for applying optimized yaw settings to wind turbines including receiving operating data from at least one wind turbine on a wind farm and sending the data to a supervisory control and data acquisition (SCADA) system on the at least one wind turbine to generate current SCADA data. The current SCADA data is sent a central processing center away from the wind farm. The central processing center includes an optimization system that can generate a new look up table (LUT) including at least one new wind turbine yaw setting calculated using information comprising wind direction, wind velocity, wind turbine location in the wind farm, information from a historic SCADA database, and yaw optimizing algorithms. The new LUT is then sent to a yaw setting selection engine (YSSE) where instructions regarding the use of the new LUT are generated.

Abstract: The present invention relates to adjustment and/or drive units which can be used in wind power plants for adjusting the azimuth angle of the nacelle of the wind power plant or the pitch angle of the rotor blades, wherein such an adjustment and/or drive unit has at least two adjusting drives for rotating two assemblies which are mounted so as to be rotatable relative to each other, and has a control device for controlling the adjusting drives. The control device controls the adjusting drives in such a manner that the adjusting drives are braced relative to each other during the rotation of the two assemblies and/or when the assemblies are at standstill. The invention further relates to a wind power plant comprising such an adjustment and/or drive unit, and to a method for controlling such an adjustment and/or drive unit.

Abstract: A method for controlling an electrical power system connected to a power grid includes receiving a reactive power command and a measured reactive power and generating a reactive power error signal based on a difference between the reactive power command and the measured reactive power. Further, the method includes receiving, via a reactive power regulator, the reactive power error signal. Moreover, the method includes generating, via the reactive power regulator, a voltage command based on the error signal. The method also includes generating, via a droop control, a voltage droop signal. In addition, the method includes generating a voltage error signal as a function of the voltage droop signal and at least one of the voltage command or a measured terminal voltage. Thus, the method further includes generating, via a voltage regulator, a reactive current command based on the voltage error signal.

Abstract: A self-aligning to the incoming wind floating platform supporting multiple wind turbines (17, 18) forms a wind power generation unit. Under horizontal wind, the wind load resultant passes the center of geometry (or “C.Geo”) of the wind load receiving areas of the floating platform, but not the turning axis (15). This results in a yaw moment about the turning axis (15) to turn the floating platform, until the wind load resultant simultaneously passes through the C.Geo and the turning axis (15). A wind park or wind farm may include at least one of these floating platforms that are capable of self-aligning to the incoming wind for electric power generation. The floating platform helps reduce the length of a submarine power cable (44) of the platform, hence reducing electric resistance and subsequently heat loss, thereby reducing the cost of the submarine power cable (44).

Abstract: Methods of operating a wind turbine (1) having a generator (10) and a power converter (60). The methods may comprise: determining a reduced first power setpoint (94) in response to an operational condition; reducing active power from a line-side converter (66) to an electrical grid (80) according to the reduced first power setpoint (94); determining a reduced power setpoint (92) for a machine-side converter (62); reducing a torque applied to the generator (10) by the machine-side converter (62) such that active power according to the reduced second power setpoint (92) is produced by the generator (10); and dissipating a power surplus in one or more resistive elements (68) as long as the second power setpoint is superior to the first power setpoint. Wind turbines configured for such methods are also provided.

Abstract: A control system and control method of a wind farm which allows taking into account dynamic variations in the possibilities of reactive power generation of each wind turbine with respect to maximum reactive power generation capacities. The system calculates an initial torque and a maximum reactive power limit such that it is not necessary to apply limitations to the initial torque.

Abstract: The invention relates to a sensor arrangement for use on a wind turbine. The sensor arrangement comprises a rotor blade-related sensor, which is arranged in/on a rotor blade, and a non-rotor blade-related sensor, wherein the sensor signals, which are associated with the rotor blade-related sensor, are processed by fusion with the sensor signals which are associated with the non-rotor blade-related sensor. The invention also relates to a method for operating a wind turbine.

Abstract: Provided are a control method and a device for active power of a wind power plant cluster. The wind power plant cluster includes wind power plants of m priorities, wherein m is a positive integer. The control method includes: monitoring the consumption capability of a power grid in real time, and determining object active power of the wind power plant cluster according to the consumption capability of the power grid; determining a command active power of the wind power plant within each priority according to the object active power of the wind power plant cluster in a descending order of the priorities; and controlling real active power of the wind power plant within each priority according to the command active power.

Abstract: A wind turbine includes a tower, an aerodynamic rotor operable at a variable rotor speed and having a plurality of rotor blades each having an adjustable rotor blade setting angle and a generator for generating an electrical output power. An operating characteristic curve is prespecified for operating the wind turbine. The operating characteristic curve indicates a relationship between the rotor speed and the output power. A controller is provided, which sets the output power in accordance with the operating characteristic curve depending on the rotor speed. The the operating characteristic curve has a starting rotation speed to which the rotor speed increases as soon as the wind turbine starts when a sufficient wind speed is reached. The starting rotation speed is defined depending on a tower natural frequency of the wind turbine and/or depending on a detected turbulence measure of the prevailing wind.

Abstract: A method of controlling, by inertia emulation, electric power generators provided with rotational inertia and connected to the electricity grid with electric power converters includes the steps of measuring grid frequency and/or frequency over-time variation over a rated frequency value; providing a threshold value for, and comparing, the grid frequency or frequency over-time variation; and converting part of the kinetic energy of the generator rotor into electric power to provide additional supporting power to the variation of the grid frequency, wherein the additional supporting power is calculated as a function of the frequency and/or the frequency over-time variation and of a predetermined variable inertia coefficient, the additional power is supplied until the grid frequency variation is restored, and/or the injected power has fallen below a preset limit value, and the coefficient of inertia is calculated by emulating the inertial behavior of synchronous machines, and as a function of rotation velocity.

Abstract: A method for estimating a wind speed at a wind turbine is disclosed, said wind turbine comprising a rotor carrying a set of wind turbine blades, each wind turbine blade having a variable pitch angle. A blade torsion contribution, representing torsion introduced in the wind turbine blades, is derived, based on an obtained rotational speed, ?, of the rotor, and an obtaining a pitch angle, ?, of the wind turbine blades. An adjusted pitch angle, ??, is calculated as a sum of the obtained pitch angle, ?, and the derived blade torsion contribution, and a wind speed, vest, is estimated, based on the obtained rotational speed, ?, and the calculated adjusted pitch angle, ??. An accurate and reliable estimate for the wind speed is thereby obtained. The wind turbine may be controlled in accordance with the estimated wind speed, vest.

Abstract: A method for controlling a wind turbine and an associated wind turbine. The wind turbine is operated according to an operating point, wherein the operating point is determined at least by a pitch angle and a tip speed ratio, wherein one of the operating points corresponds to a maximum power coefficient, wherein, in a partial load range, the wind turbine is operated at an operating point which differs from the operating point with the maximum power coefficient. The distance of the operating point from the operating point with the maximum power coefficient is set in accordance with a measured turbulence measure.

Abstract: A method for operating at least two floating offshore wind turbines (1) is disclosed. The wind turbines (1) are operated at respective first operating positions (7), and a previous and/or a future expected wear impact on each wind turbine (1) is estimated. At least one wind turbine (1) to be relocated to a respective second operating position (9) is identified, based on the estimated wear impact. The identified wind turbines (1) are moved to respective second operating position (9) and operated there.

Abstract: A solution to optimally manage those requirements ensuring on the one hand, that the requirements set by the grid operators are appropriately and accurately accomplished at a point of interconnection (POI) and on the other hand, preventing the wind turbines from over fulfilling the requirements, for example, by remaining connected at voltages levels higher or lower than the ones required which, although possible, may cause higher loads and currents in the wind turbines than needed to fulfill the requirements.

Abstract: Embodiments herein described provide systems and techniques for performing black start operations. For example, one embodiment provides a method for performing black start operations. The method generally includes operating a wind turbine in a wind park in a first mode to provide power to an alternating-current (AC) grid using a control system. The control system may include a reactive power control leg and an active power control leg. The method also includes switching operation of the wind turbine from the first mode to a second mode based on an indication to perform a black start of an electrical grid and by activating a controller with an integral action to thereby increase output power of the wind turbine, the controller being coupled between the reactive power control leg and the active power control leg, and providing power to the electrical grid while operating in the second mode.

Abstract: A vertical wind turbine that includes a plurality of vertical vanes which is secured to a vertical vane axis so as to be rotatable independently of one another about a respective vane rotational axis and which are rotatably mounted about a vertical rotor rotational axis on a common circular path. A method for operating a vertical wind turbine, in which method pitch angles of vertical wind turbine vanes driven about a respective vertical vane axis are specified. The vertical wind turbine is operated in a particularly efficient and material-preserving manner by control of the pitch angles, at least in a partial load mode of the vertical wind turbine, such that the vanes rotate with a substantially constant tip-speed ratio.

Abstract: A wind turbine includes a superconducting generator having an armature and a superconducting field winding set. The armature includes at least one multiphase armature winding set having a plurality of armature windings. The superconducting field winding set is separated by a gap from the armature. The superconducting field winding set includes a plurality of field windings, wherein one of the armature winding set and superconducting field winding set is connectable to rotate with a rotating component of the wind turbine and another of the armature and the superconducting field winding set being non-rotating. The wind turbine also includes a controllable power converter coupled to the at least one multiphase armature winding set and a controller configured to control switching operations of the controllable power converter to effect a phase shift among the plurality of armature windings.

Abstract: The disclosure relates to a generator and a wind turbine. The generator includes an active cooling loop and a passive cooling loop that are isolated from each other and both are in communication with external environment. The active cooling loop includes cavities that are in communication with each other and located at two respective ends of the generator in an axial direction, an air gap between a rotor and a stator of the generator, and radial channels arranged at intervals and distributed along the axial direction of the stator. A cooling device in communication with the external environment is disposed in the active cooling loop. The passive cooling loop includes an axial channel extending through the stator in the axial direction and an outer surface of the generator.