Abstract: The application relates to a floatable offshore wind turbine with at least one floatable foundation. The floatable foundation includes at least one floating body. The floatable offshore wind turbine includes at least one anchoring arrangement configured to fix the offshore wind turbine to an underwater ground while the offshore wind turbine is in its anchoring state. Further, the floatable offshore wind turbine includes at least one height adjustment device configured to change the vertical distance of the floatable foundation to an underwater ground surface of the underwater ground and/or to a water surface during the anchoring state based on at least one specific meteorological environmental parameter of the offshore wind turbine.

Abstract: A production system includes a first manufacturing machine and a second manufacturing machine. The production system also includes a production control unit configured to control productivities of the first and second manufacturing machines. In response to detecting a breakdown sign in the first manufacturing machine, a stop time of the first manufacturing machine is predicted. After the detection of the breakdown sign and before the first manufacturing machine stops, the productivity control unit updates the productivities of the first and/or second manufacturing machines, causing the first manufacturing machine and/or the second manufacturing machine to have an updated productivity equal to or greater than its original productivity, such that a total productivity of the first manufacturing machine and the second manufacturing machine increases.

Abstract: An apparatus for harvesting energy, such as solar, wind, wave, thermal, and the like, including a solar panel and a duct supporting the solar panel at an operational angle. The duct comprises a bottom shroud and side shrouds, therein forming a large aperture, a small aperture, and an oblique frustum shaped cavity. The oblique frustum shaped cavity is configured to direct a flow of fluid from the large aperture to the small aperture. A flow energy generator, such as a turbine, located at the small aperture is configured to collect flow energy. Temperature differences between the solar panel and the environment may be used to harvest thermal energy with a thermoelectric generator. Fluid flow under the solar panel may decrease the panel temperature and increase the efficiency. Generators may be operated in reverse to lower the solar panel temperature and increase efficiency.

Abstract: A superconducting generator includes an annular armature connectable to rotate with a rotating component of a wind turbine. A stationary annular field winding is coaxial to the armature and separated by a gap from the armature. The field winding includes superconducting coils, and there is a non-rotating support for the field winding. The non-rotating support is a torque tube. The torque tube is a member formed of a composite material, or a member formed of a plurality of segmented sections, a space frame or strut torque carrying assembly. The torque tube is connected to a thermal shield casing or a field winding housing.

Abstract: The present application discloses novel systems and methods for yawing an autonomous wind turbine. In an embodiment, the wind turbine includes a control system configured to determine a control action signal for a yaw drive mechanism of the wind turbine as a function of the wind condition(s) and as a function of the load condition(s). The control system is configured to monitor change(s) associated with the load condition(s) to determine if the load condition(s) is too high for too long, or in need of attention, before yawing of the wind turbine is initiated or, if the load condition(s) are getting too high, after yawing has been initiated. In another embodiment, the control system includes a load sensor system with proximity sensors arranged adjacent, on, and/or about the main shaft flange of the nacelle or on the rotor blades of the wind turbine.

Abstract: To provide a rotating pedestal capable of directing a wind power generation apparatus with high accuracy in the direction from which wind comes, regardless of the presence or absence of a duct is an object. Provided is a rotating pedestal comprising: a bearing that rotatably supports a wind power generation apparatus; a control device that determines a rotational angle based on information regarding a wind direction and a wind speed in a vicinity of the wind power generation apparatus, the information being transmitted from an anemometer installed to be able to measure the wind direction and the wind speed in the vicinity of the wind power generation apparatus; and a motor that rotates the bearing based on the rotational angle determined by the control device.

Abstract: The invention relates to a floating windmill installation (1, 1?, 1?), wherein the floating windmill installation (1, 1?, 1?) comprises: —a windmill (10, 10?) comprising a tower (14), —a floating installation (20, 20?) comprising an aperture (22) penetrating the floating installation (1, 1?, 1?) for accommodating the tower (14), and—means for raising and lowering the tower (14) up and down through the aperture (22).

Abstract: A control system includes a base device to be mounted on a mobile object, an aerial vehicle, a cable including a power supply cable for supplying electric power from the mobile object to the aerial vehicle and connecting the base device with the aerial vehicle, and a control device that controls flight of the aerial vehicle. The control device controls the aerial vehicle so that a relative altitude of the aerial vehicle with respect to the mobile object matches a target relative altitude. This control system optimizes an altitude of the aerial vehicle in accordance with the mobile object.

Abstract: A rotor bearing for bearing a rotor hub on a nacelle housing of a nacelle for a wind turbine has at least one inner ring element and at least one outer ring element, wherein at least one sliding bearing element is arranged between the inner ring element and the outer ring element, which sliding bearing element is fastened to the inner ring element or to the outer ring element. On the sliding bearing element, a sliding surface is formed, which cooperates with a counterface, which is coupled with that ring element, to which the sliding bearing element is not fastened. The counterface is designed to be resilient.

Abstract: In general, a generator set system may include a primary module including: an engine; a generator coupled to the engine and configured to convert mechanical energy of the engine to electrical energy; a primary frame configured to support the engine and the generator; and a first coupling. The generator set system also may include a secondary module including a secondary module including: at least one of a heat recovery module, an exhaust module, a cooling system module, a fuel system module, a solar power module, a battery module, an electrical system module, an air intake module, or an air outlet module; a secondary frame; and a second coupling. The first coupling and the second coupling are configured to automatically electrically or fluidically couple the primary module to the secondary module upon assembling the primary frame and the secondary frame.

Abstract: A method of operating a wind energy installation wherein a rotor has a first rotor blade which can be angularly adjusted, a first adjustment drive for adjusting the rotor blade, and a safety control system. In a normal mode of operation, the first adjustment drive is supplied with energy from a source and is controlled by a first pitch control system. In a failure mode of operation, the supply of energy to the first adjustment drive is switched from the source to an energy storage device and the safety control system monitors a position and/or movement of the first rotor blade. The first rotor blade is adjusted by the first adjustment drive in a direction of a predetermined stopping position, while the safety control system, as a function of the monitored position and/or movement, enables or effects a deactivation of a first power supply shut-off device.

Abstract: There is provided a method (100) of installing a pitch tube (27) into an electrical power generator (24) for a wind turbine, the method comprising: installing (105a) the pitch tube (27) so that it is coaxial with a rotational axis (R) of the generator (24); supporting (105b) a bearing arrangement (50) associated with the pitch tube (27) at an end of the generator (24) using one or more primary supports (52), wherein each of the primary supports (52) comprises a first end (58) connected to the bearing arrangement (50) and a second end (60) connected to a component (32) associated with a rotating reference frame of the generator (24); and supporting (110) the bearing arrangement (50) using one or more secondary supports (54), wherein each of the secondary supports (54) comprises a first end (62) connected to the bearing arrangement (50) and a second end (64) connected to a component (42) associated with a stationary reference frame of the generator (24).

Abstract: The present invention is a method of determining the average wind speed in a vertical plane by use of a LiDAR sensor (2), comprising performing measurements (MES), constructing a measurement model (MOD M) and a wind model (MOD V). Then an adaptive Kalman filter (KAL) is used to determine the wind speed (v), and determining the average wind speed in the vertical plane under consideration (RAWS).

Abstract: A vortex-induced vibration power generation device with a magnetic boundary structure, including upper and lower opposite groups of fixed sleeves. Each fixed sleeve includes two vertical sleeves. The vertical sleeves are hollow cavities, and include sealed ends and open ends. Rotating magnetic poles are arranged in the sealed ends of the vertical sleeves. Coil slots are formed in the inner walls of the vertical sleeves. Coil windings are mounted in the coil slots. The vortex-induced vibration power generation device further includes linear bearings. The end portions of the linear bearings are fixedly connected with the open ends of the vertical sleeves through flanges. A vibration mechanism includes a vibration rod and vibration guide rods fixedly connected with the vibration rod. Magnetic coil mounting slots and anti-falling rings are arranged on the vibration guide rods. Magnetic coils are mounted in the magnetic coil mounting slots.

Abstract: The present invention is a magnetic turbine, comprising, a housing, a set of blades attached to the housing, a set of magnets attached to the housing, a shaft connected to the housing, a based, wherein the base contains a system to convert rotational energy into electrical energy, a magnetic propulsion system connected to the base, and positioned relative to the set of magnets.

Abstract: The invention relates to a method for operating a power system of a wind turbine. The power system comprises first and second parallel connected DC-to-AC converters and at least one transformer, where each transformer comprises a primary section connected to a power line, and where the at least one transformer comprises first and second secondary sections connected to outputs of the respective first and second DC-to-AC converters. The method comprises providing a reactive correction reference, changing first and second reactive powers generated by the respective first and second DC-to-AC converters according to the reactive correction reference, so that one of the first and second reactive powers is increased while the other is decreased with amounts corresponding to the reactive correction reference so that the first and second reactive powers are unequal.

Abstract: A system and method are provided for controlling a power generating subsystem connected to a power generating system at a point of interconnection (POI). A subsystem controller receives a feedback first data signal corresponding to an electrical parameter for reactive power or power factor contributed by the power generating subsystem to the POI, the first data signal having a first signal fidelity. The subsystem controller receives a second data signal indicative of the electrical parameter measured at the power generating subsystem and having a second signal fidelity higher than the first signal fidelity. The subsystem controller generates a correlation value between the first and second data signals and applies the correlation value to modify a setpoint value for the electrical parameter at the POI. The subsystem controller uses the modified setpoint value and the second data signal to generate a setpoint command for the power generating subsystem.

Abstract: A transition piece (140) for a wind turbine tower (110) is provided, that is configured to be installed on a tower foundation (111) and to carry a tower piece (113). It comprises a high voltage joint (10) with grid input and output terminals (11, 12) and WTG connecting input and output terminals (14, 13). The grid input terminal (11) is configured for receiving and connecting to an array cable (21) from a power grid (20). The WTG connecting output terminal (13) is operatively connected to the grid input terminal (11) for receiving and connecting to an input cable (23) leading to a switchgear (30). The WTG connecting input terminal (14) is configured for receiving and connecting to an output cable (24) from the switchgear (30). The grid output terminal (12) is operatively connected to the WTG connecting input terminal (14) for receiving and connecting to an array cable (22) leading to the power grid (20).

Abstract: An energy generation system, has a roof that is configured to rest upon a structure. A frame is joined to the roof with a mounting bracket. A turbine arranged in the frame with a first turbine shaft and a second turbine shaft. A first alternator is joined to the first turbine shaft with a first drive gear. A second alternator is joined to the second turbine shaft with a second drive gear. A switching system is joined to the first alternator and the second alternator. The switching system is programmed with a loop of instructions to determine a turbine rotational speed. Then, engage the first alternator. After that, monitor the turbine rotational speed. Following that, engage the second alternator.

Abstract: A flow control method is a flow control method of controlling flow around a blade of a rotary wing, a plasma actuator being disposed at the blade. The flow control method includes: determining a characteristic frequency ratio that is a characteristic value among frequency ratios, each of the frequency ratios being a ratio between an actuator driving frequency and an angle of attack changing frequency, the actuator driving frequency being a frequency of an applied voltage applied to the plasma actuator, the angle of attack changing frequency being a frequency at which an angle of attack of the blade changes in accordance with a rotation angle of the blade; setting the actuator driving frequency such that the frequency ratio becomes the characteristic frequency ratio; and applying a voltage of the set actuator driving frequency to the plasma actuator to control the flow around the blade.

Abstract: A method for controlling an inverter-based resource (IBR) having a power converter connected to an electrical grid includes receiving a first power limit signal for the IBR from an external controller, receiving a second power limit signal for the IBR, and determining a constrained power limit signal based on the first and second power limit signals. The method also includes applying a first frequency droop function to the constrained power limit signal and determining at least one of a power reference signal or a pitch reference signal for the IBR as a function of an output of the first frequency droop function and the constrained power limit signal. Further, the method includes determining one or more control commands for the IBR based on at least one of the power reference signal or the pitch reference signal and controlling the IBR based on the control command(s) so as to support a grid frequency of the electrical grid within power available at the IBR.

Abstract: A method of modeling an equivalent wind turbine generator (WTG) system for a wind farm having a plurality of WTG units includes determining an impact factor of each WTG unit of the plurality of WTG units, determining an equivalent single WTG unit model parameters of the wind farm based on the impact factor of each WTG unit, and determining an effective wind speed of the wind farm to use as the equivalent WTG input wind speed. The method produces a model of static and/or dynamic wind farm behavior. Additionally, a software configured to execute a method of modeling an equivalent wind turbine generator (WTG) system for a wind farm having a plurality of WTG units.

Abstract: Tracking systems for adjusting a photovoltaic array are disclosed. In some embodiments, the tracking system includes an actuator that moves one or more links to cause the array to rotate. The tracking system may be disposed below a torque rail of the tracking system. The actuator may be a slew drive that retracts or extends the one or more links to cause the array to rotate.

Abstract: A method (1000-1004) for operating a wind turbine (10, 11) including a drive train (64) including a generator (42) and a rotor shaft (44) mechanically connected with the generator (42) and having an axis (30) of rotation, and a rotor (18) having rotor blades (22-22c). The rotor (18) is mechanically connected with the rotor shaft (44) and rotatable about the axis (30) of rotation. The method (1000-1004) includes determining (1100) that the generator (42) is not operating in a power generating mode, and operating (1200) the rotor (18) to move around a predefined desired angular orientation (?des) with respect to the axis (30) of rotation in an alternating fashion.

Abstract: A system and method are provided for controlling a wind turbine. Accordingly, a controller of the wind turbine detects a loss of traction of the slip coupling based on a difference between data indicative of a rotor operating parameter and data indicative of a generator operating parameter. The controller then determines an angle of slip corresponding to the loss of traction as a function of the difference. Based, at least partially on the angle of slip, a degradation value for the slip coupling is determined. A control action is implemented based on the degradation value.

Abstract: The invention provides a method for computational fluid dynamics and apparatuses making enable an efficient implementation and use of an enhanced jet-effect, either the Coanda-jet-effect, the hydrophobic jet-effect, or the waving-jet-effect, triggered by specifically shaped corpuses and tunnels. The method is based on the approaches of the kinetic theory of matter providing generalized equations of fluid motion and is generalized and translated into terms of electromagnetism. The method is applicable for slow-flowing as well as fast-flowing real compressible-extendable generalized fluids and enables optimal design of convergent-divergent nozzles, providing for the most efficient jet-thrust. The method can be applied to airfoil shape optimization for bodies flying separately and in a multi-stage cascaded sequence. The method enables apparatuses for electricity harvesting from the fluid heat-energy, providing a positive net-efficiency.

Abstract: Various examples are directed to a solar power electrolyzer system comprising a first electrolyzer stack, a second electrolyzer stack, a first converter and a first converter controller. The first electrolyzer stack may be electrically coupled in series with a photovoltaic array. The first converter may be electrically coupled in series with the first electrolyzer stack and electrically coupled in series with the photovoltaic array. The second electrolyzer stack electrically may be coupled at an output of the first converter. The first converter controller may be configured to control a current gain of the first converter.

Abstract: A control device for controlling a kite steering arrangement, including a base, a control bar support extending downward on the base, a control bar pivot point mounted displaceably about the control bar support, a pair of interconnecting members extending between opposing end regions of the control bar and the base upper the control bar support, a tensioning mechanism, a base pivot point, a base rotator for allowing rotation of the base about a vertical axis thereof, a manipulator that manipulates the base pivot point and base rotator, and a communicator, that communicates adjustment of the interconnecting members to the kite steering arrangement. The length aspect of the interconnecting members is adjusted by pivoting the control bar about the control bar pivot point and/or by displacement of the control bar pivot point relative the control bar support.

Abstract: Provided is a nacelle for a wind driven power plant, the nacelle including a nacelle bottom cover, wherein the nacelle bottom cover includes two or more segments, each of the segments being configured to contain a respective predefined maximum volume of a liquid in a receptacle in a case of leakage, and wherein the respective receptacles are configured to collectively contain a total volume that corresponds to a total amount of liquids in the wind driven power plant, in particular a total amount of lubricating oils and/or cooling liquids in the wind driven power plant. Also provided is a wind driven power plant including the nacelle and a wind park including a plurality of the wind driven power plants.

Abstract: A power electronics assembly for a power generation system includes a housing and an attenuator card positioned within the housing. The attenuator card may include at least one printed circuit board for a high-voltage attenuator circuit. The power electronics assembly also includes a potting material at least partially filling the housing on one or more sides of the attenuator card, a detachable end cap positioned at a first end of the housing, and multi-phase wiring communicatively coupled to the high-voltage attenuator circuit through the end cap.

Abstract: In a general aspect, a system stores energy underwater. In some aspects, the system includes a base having a bottom side resting on an underwater floor and a top side that includes recessed surfaces. The system also includes domed walls extending from the top side of the base to form respective fluid chambers. Each of the fluid chambers includes an interior volume that is at least partially defined by one of the recessed surfaces and an interior surface of one of the domed walls. The system additionally includes a pump and a generator. The pump is configured to transport water from the fluid chambers toward an exterior environment of the system. The generator is configured to generate electrical energy in response to water flowing from the exterior environment toward the fluid chambers.

Abstract: Systems and methods of autonomous farm-level control and optimization of wind turbines are provided. Exemplary embodiments comprise a site controller running on a site server. The site controller collects and analyzes yaw control data of a plurality of wind turbines and wind direction data relating to the plurality of wind turbines. The site server determines collective wind direction across an area occupied by the plurality of wind turbines and sends yaw control signals including desired nacelle yaw position instructions to the plurality of wind turbines. The site controller performs wake modeling analysis and determines desired nacelle positions of one or more of the plurality of wind turbines. The desired nacelle yaw position instructions systematically correct static yaw misalignment for all of the plurality of wind turbines. Embodiments of the disclosure provide means to perform whole site or partial site level controls of the yaw controllers of a utility scale wind turbine farm.

Abstract: A microgrid system includes first and second DC power sources electrically connected to respective first and second DC electrical power busses, a first uninterruptable power module electrically connected to the first DC electrical power bus and configured to be connected to an alternating current (AC) load, a second uninterruptable power module electrically connected to the second DC electrical power bus and configured to be connected to the AC load, a first bi-directional AC/DC inverter having a DC end and an AC end, where the first DC electrical power bus is connected to the DC end of the first bi-directional AC/DC inverter, a second bi-directional AC/DC inverter having DC and AC ends, where the second DC electrical power bus is connected to the DC end of the second bi-directional AC/DC inverter, and an AC electrical power bus electrically connected to the first and second bi-directional AC/DC inverters at their AC ends.

Abstract: A vertical axis turbine includes a rotatable hub assembly that is configured to be connected to an energy sink and rotatable about an axis of rotation. At least two blades are mounted on the hub assembly, each blade including a leading edge and a trailing edge, the blades being oriented so that the respective leading edges face in a common rotational direction. Each blade further includes a straight section that is substantially parallel to the axis of rotation and two helical sections, the straight section being interposed between the helical sections, and the helical sections extending at least partially around the axis of rotation.

Abstract: The present invention teaches a vertical axis wind turbine including a base structure; a yaw system secured to the base structure; a rotatable turbine main body secured to the yaw system, a main shaft rotor including a plurality of vertical rotor blades secured to the main shaft rotor for the collection of wind energy located within the turbine main body, and an electrical control system to control the yaw system. The turbine main body includes a single spiral stator having a single vertically aligned opening. The yaw system rotates the rotatable turbine main body to align or not align the single vertically aligned opening with the wind.

Abstract: Systems and methods of greenhouse gas removal and subsea sequestration are described herein. Disclosed systems and methods include a direct air capture device capturing greenhouse gases from the atmosphere, a transport apparatus fluidly connected to the at least one direct air capture device, an underwater disposal well fluidly connected to the transport apparatus, and an underwater work apparatus operatively connected to the underwater disposal well. The transport apparatus transfers the greenhouse gases to the underwater disposal well, and the underwater disposal well injects the greenhouse gases into an underwater geologic formation. The greenhouse gases may be solidified as mineral deposits and permanently stored in the underwater geologic formation. Disclosed systems may include a loading system configured to be periodically connected to the transport apparatus. The loading system has a plurality of rotatable joint modules connected by independently actuatable joints.

Abstract: A method for estimating a temperature of a motor of a pitch drive mechanism of a rotor blade of a wind turbine includes monitoring, via at least one sensor, an actual temperature and at least one additional operating condition of the motor during a normal operating period of the wind turbine. The method also includes storing, via a pitch controller, the monitored temperatures and the monitored additional operating conditions of the motor for the normal operating period. Further, the method includes determining a relationship between the monitored temperatures and the monitored additional operating conditions of the motor for the normal operating period. Thus, in the event that the sensor fails to operate, the method includes determining, via the pitch controller, an estimated temperature of the motor based on the relationship.

Abstract: A wind turbine drive control device according to one aspect of the present invention is a wind turbine drive control device for controlling at least one drive device for moving two structures included in a wind power generation device relative to each other, the wind turbine drive control device including: an obtaining unit for obtaining information related to a load occurring between the at least one drive device and one of the two structures that receives a force generated by the at least one drive device; and a control unit for controlling the at least one drive device so as to cause a force generated by the at least one drive device to be reduced or zero based on the information related to the load obtained by the obtaining unit during a stop period in which the two structures are stopped relative to each other.

Abstract: A method of controlling a microgrid includes receiving, by a power management system, PMS, of the microgrid, operating point values for a plurality of controllable assets. The method includes determining, by the PMS, an asset headroom. The method includes determining, by the PMS, a modified operating point value that is dependent on the received operating point value of the controllable asset, the determined asset headroom of the controllable asset, and a total power offset of the microgrid. The method includes controlling, by the PMS, the controllable assets for which the modified operating point values have been determined in accordance with the modified operating point values.

Abstract: A fuzzy finite-time optimal synchronization control method for a fractional-order permanent magnet synchronous generator, and belongs to the technical field of generators. A synchronization model between fractional-order driving and driven permanent magnet synchronous generators with capacitance-resistance coupling is established. The dynamic analysis fully reveals that the system has rich dynamic behaviors including chaotic oscillation, and a numerical method provides stability and instability boundaries. Then, under the framework of a fractional-order backstepping control theory, a fuzzy finite-time optimal synchronous control scheme which integrates a hierarchical type-2 fuzzy neural network, a finite-time command filter and a finite-time prescribed performance function is provided.

Abstract: The present invention describes methods, systems, and devices for utilizing high-intensity regions within atmospheres of planetary bodies to receive and harvest electricity. Such high-intensity regions are formed as a result of the combined gravitational forces affecting a given planetary body and particularly the particles within the atmosphere of that planetary body. The combined gravitational forces result in a gravitational resonant frequency which affects the atmosphere most intensely within said high-intensity regions. By determining moments of gravitational resonant frequencies based on a given location, the methods, systems, and devices described herein utilize the energy provided within the high-intensity regions during the determined moments. Harvesting and further transmitting the collected energy is also disclosed.

Abstract: A rotor wind turbine blades with attached mantle peridotite panel available to capture CO2 in air while the blades are rotating powers by the wind. Due to presence of Ca+ and Mg+ in the mantle peridotite glass cell, the panel composed of glass cells can conduct sequestration of carbon dioxide in air and the product of CO2 sequestration is mineralized carbon. Another means of CO2 sequestration in air is by placing the mantle peridotite panel at the top of the wing structure of plane and capture the CO2 while the plane is flying.

Abstract: Provided is a portable power generating system including a base, an electric motor fixed on the base, a circular rotating table located at a center of the base and rotated by the electric motor, and two or more power generators fixed on the base and driven by the circular rotating table. Further, the system includes an extended generator shaft where magnet rollers are attached for increasing centripetal force and rotating on the rotating table in one direction. Also, a battery is provided for starting the system.

Abstract: An ecological system for use in land or marine vehicles is provided, which uses wasted airmass making it to pass through two subsystems which allow lighten the load of the moving vehicle and generates electrical energy. Therefore, showing an economy in fuel, tires, and general maintenance savings, as well as a decrease of contaminants thrown to the environment.

Abstract: A coupling includes a plurality of laminations forming a lamination package and having lamination holes arranged flush to form an assembly opening, a ring, and a bush accommodated in the assembly opening and having a first end area connected to the ring via a form-fit connection.

Abstract: A wind-powered generator includes a housing having an inlet, an outlet, and a throat that are coaxial about an axis of symmetry of the housing. A nacelle includes a first rotor mounted on a first end of the nacelle and positioned at least partially within the inlet, the first rotor outputting a first power output, and a second rotor mounted on a second end of the nacelle, the second rotor being positioned at least partially within the outlet and having a diameter less than the first rotor. The second rotor outputting a second power output. The first and second power outputs are combined to provide a combined power output, and a nacelle ratio between outer diameters of the nacelle at the inlet and at the outlet is between about 1.60-1.70, and a housing ratio between inner diameters of the housing at the inlet and at the outlet is about 1.85-1.97.

Abstract: The present invention relates to a method of determining an induction factor between the rotor plane (PR) and a measurement plane (PM), involving measuring the wind speed in at least two measurement planes (PM), determining the wind speed in rotor plane (PR) by use of a Kalman filter from the measurements, and measuring the induction factor by use of an adaptive Kalman filter from the measurements and the wind speed in rotor plane (PR).

Abstract: A lighthouse includes a mast device and a lighting device mounted on the mast device. The lighthouse further includes a main body including a box body and a top cover, the top cover is arranged on a top of the box body, the top cover and the box body define a receiving chamber, and the top cover is movable or detachable relative to the box body to open or close the receiving chamber. The lighthouse is convenient for overhaul and maintenance, and improves the maintenance efficiency.

Abstract: This disclosure describes a system for sending control signals and receiving sensor signals over cables at long distances. Electric currents and signals traveling down long cables can undergo phenomenon that are not present in relatively short cables. Therefore, this disclosure contemplates solutions for overcoming or compensating for these phenomenon to enable control of an electric machine using long cables. The solutions can include a signal conditioning circuit, configured to output a DC current corresponding to the sensed voltage associated with the sensor, a first conductor, that transmits the DC current from the signal conditioning circuit to the controller, and a signal generator, configured to receive the command signals and generate pulse width modulated (PWM) actuating signals based on the command signals.

Abstract: A method for controlling an inclination of a floating wind turbine platform to optimize power production, or to reduce loads on the turbine, tower, and platform, or both, includes receiving data associated with the inclination of the floating wind turbine platform and wind speed and direction data. An angle of difference between the turbine blade plane and the wind direction is determined, where the angle of difference has a vertical component. A platform ballast system is then caused to distribute ballast to reduce the vertical component to a target angle chosen to optimize power production, or reduce turbine, tower, and platform loads, or both.