Abstract: Disclosed is a system and method for both consumer and utility scale energy extraction from flow-based energy sources. The passive system may utilize directing perforations on a surface in order to create and air jet vortex generators. Alternatively the system may provide for flow through discrete orifices aligned with the span of an aerodynamic assembly in a co-flow direction, utilizing a Coanda effect. Further additional configurations include directing flow through a perforated surface skin that is near the trailing edge on the suction side. Even further are embodiments for blowing air directly out of the trailing edge of an airfoil. The disclosed systems and methods support a wide variety of scenarios for fluid flow energy extraction, such as wind or water flow, as well as for related products and services.

Abstract: A battery storage and/or a wind turbine including the battery storage. A generator for generation of an electric current. An electric flow path configured for conducting the electric current to an electric grid via a power converter, the power converter. The battery storage electrically connected to the electric flow path, the battery storage comprising a plurality of battery cells, each battery cell comprising at least one battery element and at least two semiconductor switches. A controller is configured for selectively controlling the voltage over the battery storage by controlling the status of the at least two semiconductor switches of a plurality of the battery cells, and thereby whether a current path through the battery storage is bypassing the at least one battery element or passing through the at least one battery element of one or more of the plurality of battery cells.

Abstract: Methods and systems are provided for nautical stationkeeping of free-floating objects. In one example, a method includes adjusting translational motion of a body freely floating in water by rotating the body. The translational motion may be adjusted, for instance, to maintain the body within a geographic area. In certain examples, the adjustment of the translational motion may be realized via a Magnus effect induced by rotating the body. The body may be configured as, for example, a free-floating object such as a wave engine.

Abstract: The disclosure relates to a generator segment of a segmented generator, in particular of a permanently excited segmented rotary generator, of a wind turbine, comprising a rotor segment of a rotor, and a stator segment of a stator, wherein the rotor segment and the stator segment in an operation position are disposed so as to be mutually spaced apart in a radial direction by an air gap, and are disposed so as to be mutually spaced apart in an axial direction by an axial spacing; wherein the rotor segment and the stator segment are able to be disposed and/or displaced relative to one another along a rotation axis by the axial spacing, between an operation position and a transport position that is different from the operation position.

Abstract: An airflow charging system and vehicle include a turbine, a driveline pulley and a driving belt, a main charging pulley and a charging belt, a processor, and a memory. The turbine is configured to rotate the driveline pulley, and the driveline pulley is operably connected to an electric motor. The main charging pulley is operably connected to the electric motor, and rotation of the main charging pulley is configured to charge a battery. The battery provides power to the electric motor. The memory includes instructions stored thereon, which, when executed by the processor, cause the system to receive a first signal indicating that the vehicle is in motion, operate the electric motor to rotate the turbine, receive a second signal from the vehicle indicating a vehicle speed, and, if the vehicle speed is greater than or equal to a predetermined speed, stop operating the electric motor.

Abstract: Provided is a method for operating a wind turbine having a generator and a rotor with rotor blades. The method includes generating electrical power from wind using the generator, using a first part of the generated power as an auxiliary component for supplying auxiliary devices of the turbine used for operating the turbine, where the auxiliary component varies up to a limit. The method includes feeding a second part of the generated electrical power into a grid as a feed-in component, checking the grid for a grid fault that does not allow feeding power into the grid and continuing the operation of the turbine when the fault is detected. The generation of power from wind is reduced to a cut-back power that corresponds to the limit the auxiliary component for operating the auxiliary devices is used from the cut-back power and remaining residual power of the cut-back power is consumed.

Abstract: An a arrangement for controlling a DC-link-voltage of a DC-link connected between a generator side converter portion and a utility grid side converter portion of a wind turbine includes: a generalized predictive control module adapted: to receive as control module input values a current value of the DC-link-voltage and a reference value of the DC-link-voltage and to derive a reference value of a DC current based on the control module input values, the reference value of a DC current defining the DC current to be injected into the DC-link, wherein the arrangement is adapted to control the generator side converter portion and/or the utility grid side converter portion based on the reference value of the DC current.

Abstract: A method of installing an offshore wind turbine includes the step of raising a full-length tower for the offshore wind turbine by moving it longitudinally from a container in a substructure, the substructure being a support structure for the wind turbine, wherein the substructure is arranged with a container configured for housing a tower for the wind turbine substantially in its entirety.

Abstract: Techniques are disclosed herein for minimizing movement of an offshore wind turbine. Using the technologies described, a wind turbine may be mounted on a marine platform that is constructed and deployed to reduce environmental loads (e.g., wind, waves, . . . ) on the platform in both shallow and deep water. In some configurations, a fully restrained platform (FRP) is configured to support a wind turbine. According to some examples, moorings are attached to the FRP and/or the structure of the wind turbine structure to reduce movement in six degrees of freedom.

Abstract: A controller is provided for a floating wind turbine including a rotor with a number of rotor blades connected to a generator. The controller includes an active damping controller for calculating one or more outputs for damping both a first motion of the floating wind turbine in a first frequency range and a second motion of the floating wind turbine in a second frequency range based on an input of the first motion and an input of the second motion, The controller is arranged to calculate an output for controlling a blade pitch of one or more of the rotor blades and/or for controlling a torque of the generator based on an actual rotor speed, a target rotor speed, and the one or more outputs from the active damping controller such that both the first motion and the second motion will be damped.

Abstract: The present disclosure relates to controlling an operation of a wind turbine. A first plurality of extreme load measures indicative of extreme loads experienced by at least part of the wind turbine during the first period of time are determined and a load probability characteristic is then determined based on a statistical analysis of the distribution of the first plurality of extreme load measures. A control strategy for controlling the operation of the wind turbine is then modified based at least in part on a comparison of the load probability characteristic and a design load limit and the wind turbine is then subsequently controlled in accordance with the modified control strategy for a second period of time.

Abstract: An arrangement including a transmission, a feedthrough tube, and a fixing means is disclosed. A fixing means is disclosed whereby the feedthrough tube is fixed in the transmission. The fixing means includes an electrical non-conductor. Arrangements are disclosed in which the feedthrough tube is fixed axially and immovably in the fixing means.

Abstract: The invention provides a method for determining a wind turbine layout in a wind power plant comprising a plurality of wind turbines. The method comprises the steps of generating a plurality of random layout candidates fulfilling a set of basic requirements, and then performing a pre screening process on each of the plurality of random layout candidates. Based on the pre-screening process, a subset of layout candidates is selected and detailed optimization is performed on the layout candidates of the selected subset of layout candidates. Based on the detailed optimization, an optimized layout for the wind power plant is selected among the optimized layout candidates of the subset of layout candidates.

Abstract: Provided is a power generation system including a wave power generator that can be configured in a simple manner. The power generation system 1 includes: a power generation unit including a wave power generator 11; a power storage unit 40 accumulating electric power obtained by the power generation unit; a production unit 51 producing at least one of hydrogen and an organic hydride based on the electric power obtained by the power storage unit; and a tank 53 located below compared to the wave power generator 11 and storing at least one of the hydrogen and the organic hydride obtained by the production unit 51.

Abstract: The segments of a segmented wind turbine rotor blade are screwed together at respective connection ends via a plurality of connecting bolts. Sleeve-shaped pressure pieces are arranged between the rotor blade segments, each of which is mounted on a connecting bolt. A plurality of first metal sheets is provided, each first metal sheet being arranged between a respective connection end and several pressure pieces, so that an electrically conductive connection is formed between several pressure pieces via a first metal sheet. The first metal sheets, which are associated with the first connection end, are each arranged along the circumference of the rotor blade offset from the first metal sheets, which are associated with the second connection end. Further, a metal sheet for a segmented wind turbine rotor blade is disclosed.

Abstract: Provided is a marine current energy generating device for a deep sea cage. The marine current energy generating device includes a vortex vibration generating portion, where the vortex vibration generating portion is used for generating vortex vibration on a side facing away from a marine current; power generating portions, where several nano friction generators are arranged in the power generating portions, and the several nano friction generators generate power by using the vortex vibration generated by the vortex vibration generating portion and are electrically connected to each other; a guide portion, where the guide portion is used for making the vortex vibration generating portion perpendicular to a direction of the marine current all the time; and corrosion protection assemblies, where the corrosion protection assemblies are arranged at joints of the vortex vibration generating portion to the power generating portions and the guide portion.

Abstract: The invention refers to a combined power generator for near shore area wherein on a support frame are mounted, at the base a vertical wave turbine coupled by a ratchet coupling to a wind turbine coupled in its turn by a speed raising coupling to an electric generator and above a photovoltaic platform with solar tracking system, with bi-facial photovoltaic panels, with a system of mirrors for the reflection of light on the back of the bi-facial photovoltaic panels, a hybrid controller and an inverter for taking over the electricity from the electric generator and the photovoltaic panels respectively and the transformation to the corresponding parameters for sending into the electrical network. By placing the three convertors vertically the energy efficiency on the surface unit in near-shore areas increase. Other advantages of the installation are: constructive simplicity, low price of construction, maintenance and operation, wave breaker.

Abstract: A canopy for a direct drive wind turbine is provided. The canopy includes an interface section configured for mechanically coupling the canopy to a generator, wherein the interface section includes at least one outlet configured to receive cooling fluid exhausted by the generator and eject the received cooling fluid. A wind turbine including such a canopy is also provided.

Abstract: A semi-submersible floating wind power generator includes a wind power generator set, a post device, a load carrying device and a mooring device. The wind power generator set is disposed at a first end of the post device. The load carrying device is disposed at a second end of the post device. The mooring device is disposed at the second end of the post device. The post device includes a main post and multiple auxiliary posts. The main post is disposed in parallel with the multiple auxiliary posts, and second ends of the multiple auxiliary posts are aligned such that the second ends of the multiple auxiliary posts form a first plane, and the second end of the main post is disposed at a position closer to the first end of the main post than the first plane.

Abstract: A piezoelectric power generator includes a stiff segment having a plurality of piezoelectric elements. A flexible segment extends from the stiff segment, and a shape memory element is incorporated into the flexible segment to control its stiffness. A network of capillary-like tubes are also integrated into the flexible segment to control its density (mass). The proposed design optimizes the performance of the piezoelectric wind energy generator under high-speed conditions by controlling mass and stiffness of the flexible segment.

Abstract: A method of calculating a return period wind speed for a proposed wind turbine site is provided. Wind speed measurements and modeled wind speeds associated with the proposed site are provided. The measured and modeled wind speeds are transformed into the frequency domain, and combined to generate a hybrid spectrum. The hybrid spectrum is transformed into the time domain to generate a set of hybrid wind speed measurements, which are used to calculate the return period wind speed.

Abstract: A generator (24) for a wind turbine (1) comprises a rotor (32) with an axis of rotation, a stator and a radial and/or axial locking mechanism. The radial locking mechanism comprises a plurality of radial locks (60) with a fixed portion (70) coupled to the stator and a movable elongate portion (72) configured to move relative to the fixed portion (70) and radially with respect to the axis of the rotation to lock the stator in a radial direction. The rotor (32) may comprise at least one lock engagement feature (86) arranged at its end surface and an end shield (90) located axially outward and at least partially adjacent the end surface. The end shield (90) comprises at least one opening enabling access to the end surface of the rotor (32).

Abstract: A method for controlling a wind turbine using an estimated wind speed is provided. The wind turbine has a rotor rotatable with a variable rotor speed and having rotor blades with adjustable pitch angles and a generator adapted to control a generator torque or a generator output power. The method comprises measuring the rotor speed, determining a common pitch angle representative of at least one or all pitch angles of the rotor blades, determining the generator torque or an output power of the generator and estimating the wind speed by means of an observer. The observer uses a model of the wind turbine as an observer model, uses as input variables, the measured rotor speed, the determined common pitch angle and the determined generator torque or the determined output power, and incorporates expected variations of the wind as at least one stochastic variable.

Abstract: A fluidic structure configured to be mounted onto the hub of a fluidic turbine comprising a hub that rotates about a center axis, aligned to a main shaft that contributes torque to the main shaft of the turbine via the principle of lift and/or drag. The fluidic structure is mounted onto the hub of a primary turbine that contributes torque to the main shaft through increasing at least one of lift and drag, and the fluidic structure includes two or more curved fluidic elements that extend from an upstream tip that aligns to the center axis of rotation, to a downstream end at a radial position away from the center axis, and rotates about the center axis to contribute torque to the primary turbine; and a sensor positioned at or proximate to an upstream tip of the fluidic structure for determining environmental and turbine conditions and transmits information to a supervisory control and data acquisition system of the primary turbine.

Abstract: An offshore wind turbine includes a ballast adjustable hull. In addition, the offshore wind turbine includes a telescopic tower movably coupled to the hull. The tower has a central axis and comprises a plurality of nested concentrically arranged elongate tubulars. Further, the offshore wind turbine includes a ballast adjustable elevator disposed about the telescopic tower and movably coupled to the hull. The elevator is configured to lift one or more of the plurality of tubulars of the tower axially upward relative to the hull. Still further, the offshore wind turbine includes a nacelle coupled to an upper end of one of the plurality of tubulars of the tower. Moreover, the offshore wind turbine includes a rotor assembly coupled to the nacelle.

Abstract: Embodiments herein determine performance parameters for a balance of plant estimator of a power plant controller configured to control a renewable power plant comprising a plurality of power generating units, wherein the balance of plant estimator is configured to provide an internal power loss estimation of the renewable power plant. The embodiments include providing at least one first pair of associated first and second power values in a first power range, providing at least one second pair of associated first and second power values in a second power range, determining a representative of the first pair, and determining a representative of the second pair in accordance with predetermined rules, and calculating a first set of performance parameters using the representatives of the first and second pairs of associated first and second power values.

Abstract: A vertical axis wind turbine is disclosed. The wind turbine may include a mast, a first arm, a second arm, a blade, a first vertical bracing member, and a second vertical bracing member. The first arm may be attached to the mast at a first mast connection point, and the second arm may be attached to the mast at a second mast connection point via respective arm proximal ends. The blade may be attached to the first arm and the second arm via respective arm distal ends. The first vertical bracing member may connect the mast with the first arm, and the second vertical bracing member may connect the mast with the second arm. The wind turbine may further include one or more horizontal bracing members connecting adjacent wind turbine arms.

Abstract: A condition monitoring system comprises a measurement device and a processing server. The measurement device measures a condition of an apparatus provided for a wind power generation facility. The processing server associates measurement data measured by the measurement device with load data representing an operating load of the wind power generation facility acting at a time when the measurement data is measured and cumulative load data representing a cumulative operating load accumulated up to the time when the measurement data is measured, to generate a data set of the load data, the cumulative load data, and the measurement data for the time when the measurement data is measured.

Abstract: Proposed is a wind turbine having a vertical axis rotor mounted in a fixed cylindrical housing provided with outwardly opening shutters. The rotor consists of a rotating core comprising core blades fastened between two circular bases and forming a Ugrinsky rotor, and an annular impeller configured for independent rotation about said core. The impeller comprises impeller blades fastened between two ring-shaped bases and forming a continuation of the core blades, wherein common inter-blade channels are formed which narrow toward the centre of the rotor. Also proposed are wind power stations based on the wind turbines described above, said turbines being mounted vertically one above the other to form a generating tower, or being mounted on a facade of a high-rise building. Technical result consists, in particular, in increasing the efficiency of the wind turbine and making it possible to incorporate wind power stations into an urban environment.

Abstract: A kinetic energy conversion system generates usable electrical energy from the kinetic energy of a plurality of railroad cars moving along a designated section of a railroad track of a railway network. The system includes a magnetic rotor assembly including at least one rotor unit having at least one magnet mounted thereto, and an axle attached to the rotor unit. A generator assembly having at least one electrical generator is disposed in an operative engagement with the magnetic rotor assembly to generate an amount of electrical energy. A support assembly dimensioned and configured to maintain at least one rotor unit in a magnetically proximate orientation relative to the plurality of railroad cars moving along the designated section of the railroad track causing rotation thereof resulting in the generation of electrical energy by the electrical generator.

Abstract: The present invention relates to a circuit arrangement having an active rectifier circuit, in particular on a secondary side of an inductive energy transmission path. The circuit arrangement has a half or full bridge of power transistors for rectifying an AC voltage induced in an input inductor of the circuit arrangement. The power transistors are connected to the input inductor in such a way that an auxiliary voltage is split off from the induced AC voltage for switching the power transistors. As a result, even large currents, which result in a low output voltage, can be transmitted without endangering the operation of the rectifier circuit.

Abstract: A tensegrity offshore wind power generation support structure is provided, relating to the technical field of offshore wind power. The support structure includes inclined columns, prestressed cables, a rigid support, a floating foundation and anchoring systems. A stable self-balancing space supporting structure is formed by the inclined columns and the cables; the inclined columns inclines outwards, upper parts of the inclined columns are connected with the prestressed cables; the bottom ends of the inclined columns are connected with the floating foundation; the middle parts of the inclined columns are connected with the rigid support; and the floating foundation is fixed with a seabed through the anchoring systems. According to the support structure, a tower in the traditional design is not needed, and all the cables are ensured to be in a tension state through the support of the inclined columns.

Abstract: Various embodiments of the teachings herein include a device for controlling energy flows between components of an energy system with an energy accumulator comprising a controller for adjusting the energy flows. The controller computes the energy flows beforehand for a time domain using an optimization method, the time domain having a beginning and an end. A charge level of the energy accumulator at the end of the time domain is essentially equal to a charge level of the energy accumulator at the beginning of the time domain.

Abstract: The present disclosure relates to and envisages a jetstream power generating system. Producing electric power from jetstream force presents specific, daunting, physics-based challenges, because jetstream forces are 30 to 50 times stronger than wind on the ground. The system is configured to harness the energy of these jetstream forces in farms as power generating infrastructure. The system comprises an airborne element configured to be subjected to lift forces while flying in a jetstream, a capstan drum, a tether coupled between the airborne element and the capstan drum, an arcuate guide track, a kite tracker displaceably mounted on the guide track, a conversion unit coupled to the capstan drum, a plurality of accumulators configured to fluidly communicate with the conversion unit, and a generator.

Abstract: A system includes a solar panel unit comprising at least one solar panel connected to a respective molten salt cell, a wind motor unit comprising at least one wind motor that is powered by the solar panel unit, each wind motor having a channel, a turbine unit comprising at least one turbine, each turbine associated with a respective wind motor via the channel, the turbine unit powered by the wind motor unit, a first battery receiving and storing power generated by the turbine unit to be used by the system, a second battery receiving and storing power generated by the turbine unit for use outside of the system, and a housing that protects at least the wind motor unit and the turbine unit.

Abstract: An assembly is provided for an aircraft. The aircraft assembly includes a rotating structure, a geartrain, a propulsor rotor and an electric machine. The rotating structure includes a turbine rotor. The geartrain includes a sun gear, a ring gear, a plurality of intermediate gears and a carrier. The sun gear is rotatably driven by the rotating structure. Each of the intermediate gears is between and meshed with the sun gear and the ring gear. Each of the intermediate gears is rotatably mounted to the carrier. The propulsor rotor is rotatably driven by the carrier. The electric machine is coupled to the ring gear.

Abstract: A box-type wind power generation device and a power generation device set is provided, the box-type wind power generation device includes a box body, a first energy collecting unit and a first connection member. The box body includes at least one flexible housing member and at least one rigid housing member which enclose at least one sealed cavity. The first energy collecting unit includes a piezoelectric membrane and electrodes deposited on both sides of the piezoelectric membrane, respectively; the first energy collecting unit overlying on an inner wall of the flexible housing member and are located in the sealed cavity. An end of the first connection member is fixed to the flexible housing member so that the first connection member is connected to the box body and at least a part of the first connection member is located outside the sealed cavity.

Abstract: Provided is a method of controlling a converter, in particular of a wind turbine, the converter including a first converter portion connected to a generator, a DC-link, and a second converter portion connected to a utility grid. The method including: controlling the first converter portion and the second converter portion by a first control signal and a second control signal, respectively, both being derived based on a requested power signal, in particular requested active power signal, and a generator rotational speed, wherein the first control signal indicates substantially constant generator torque for rotational speed variations of the generator rotational speed above a frequency threshold.

Abstract: A method of yawing a nacelle in a wind turbine having a yawing assembly comprising a drive-ring and a plurality of drives configured to exert a torque during movement along the drive-ring and thereby move the nacelle relative to the tower. The drive-ring is made of drive-ring segments joined in intersections. The method comprises defining a location for each intersection, defining a reference torque exerted by the drives when moving along the drive-ring, defining a reduced torque being lower than the reference torque, determining when a crossing drive moves across the location of an intersection, and to increase the lifetime, exerting the reduced torque by the crossing drive.

Abstract: The guide vane assembly for partially surrounds a vertical axis wind turbine (VAWT), and comprising a front guide and a side guide. The front guide extends ahead of the VAWT and covers a first portion of the VAWT. The front guide has a first inner side and a first outer side meeting at a first leading edge, the first inner side extending from the first leading edge to a first trailing edge and having a shape configured to accelerate incoming air flow from a front of the system into the VAWT. The side guide has a second inner side and a second outer side meeting at a second leading edge located laterally to the uncovered portion of the turbine and aligned with or to the side and behind a frontmost edge of the VAWT. The second inner side extends concavely around the VAWT toward a rear of the VAWT.

Abstract: The invention relates to a wind turbine (2) comprising: a nacelle (8) provided on the top of a tower (12), a rotor including a hub (6) and a number of blades (4), a main shaft (16) configured to be driven by the rotor about a main axis and supported on the nacelle (8), a generator (28) having a generator rotor and generator stator, and a gear system (25) arranged to increase the rotational speed between said rotor and said generator rotor.

Abstract: Described is an oscillating device for generating electricity from a fluid flow, comprising at least one oscillating part, at least one support, fixed to a reference surface and connected to the oscillating part at an oscillation axis, at least one counter-balancing system connected to, and/or acting on the oscillating part, at least one adjustable profile configured to be at least partially immersed in the fluid flow and movably connected to the oscillating part. The oscillating device comprises an adjustment system configured to change the position of the adjustable profile with respect to the fluid flow between at least one position of greatest resistance and at least one position of least resistance.

Abstract: The exemplary embodiments herein provide an airborne power generation assembly comprising an airborne power generation unit, a submersible platform, an electrified tether winch attached to the submersible platform, an electrified tether connecting between the electrified tether winch and the airborne power generation unit, and a power output exiting from the submersible platform. Embodiments include an underwater docking station with a docking station tether connecting the submersible platform to the underwater docking station. The submersible platform or the underwater docking station may be anchored to the sea bed. Other embodiments include winches for the sea bed anchor tethers and docking station tether.

Abstract: Controlling a wind turbine including measuring a wind speed for a location upwind of a wind turbine. Using the measured wind speed, a changed steady-state deflection of a structure of the wind turbine is predicted. The predicted changed steady-state deflection corresponds to a time when wind from the location is incident on the wind turbine. Oscillations of the structure are damped relative to the changed steady-state deflection. By damping the oscillations relative to the changed steady-state deflection, movements of the structure may be minimized when there is no predicted change in steady-state deflection, while permitting more rapid movements during transitions from one steady-state deflection to the predicted steady-state deflection, allowing more of the available power to be captured by the wind turbine.

Abstract: An electrical module rotisserie assembly for battery module handling and mechanical and electrical testing. The electrical module rotisserie assembly includes a rotatable frame structure with various sliders and insulated joints to provide an adjustable platform to fit any size electrical module and permit access to any surface of the electrical module for various testing and validation activities in an electrically-isolated manner. A plurality of modular adjustable hold down clamps secure the electrical module to the rotatable structure and slide along the structure to accommodate different electrical modules that may have different mounting formats. These adjustable hold down clamps benefit from polymer module pins that may be customized to fit any electrical module design and create electrical isolation for sensitive electrical testing.

Abstract: A marine wind power generation floating body according to an embodiment of the present disclosure can be coupled to a tower used for wind power generation and is provided at sea. The marine wind power generation floating body includes a floating main body which is formed at a predetermined length and which has a circular transverse cross section, a ballast part positioned on one side of the floating main body, a damping plate positioned at one end of the floating main body, and formed with a diameter that is larger than the outer diameter of one side of the floating main body, and a pitching/rolling damping part which is positioned on the other side of the floating main body, and which damps the horizontal pitching and rolling of the floating main body.

Abstract: A power supporting arrangement for a power grid includes a first and a second voltage source converter with an AC side and a DC side. A DC link interconnects the DC sides of the voltage source converters. A first switching arrangement includes a number of settable positions. The AC side of the second voltage source converter is connected to the power grid and the first switching arrangement is connected between a first synchronous machine. The AC side of the first voltage source converter and the power grid and operable to selectively connect the first synchronous machine to the power grid or to the AC side of the first voltage source converter.

Abstract: A wind energy generation system includes a tower, a nacelle provided in an upper portion of the tower to be rotatable around a central axis of the tower, a hub provided in front of the nacelle to be rotatable around an axis orthogonal to the central axis, and one or more blades provided on the hub. An oil receiving portion is provided on an outer wall of the tower to protrude outward from the outer wall and encircle the outer wall around the central axis. One or more opening portions that guide the oil received by the oil receiving portion into the tower are provided at a portion of the outer wall of the tower at which the oil receiving portion is provided. In the wind energy generation system, outflow of oil to the outside from the generation system can be inhibited.

Abstract: A wind generator for creating electrical energy using a magnetic levitation electrical production system is provided. The wind generator includes a central hub, a conductive track, and a plurality of tubes. The magnetic field source of a plurality of tubes and a conductive track are aligned such that the magnetic field source of the plurality of tubes repels the magnetic field source of the conductive track and wherein a propulsive force induces the circular travel of the plurality of tubes in the conductive track. The circular travel of a plurality of tubes creates a stepwise production of electrical energy for transfer to a power collection system.

Abstract: A method of determining an orientation of a nacelle of a wind turbine, wherein the nacelle carries a Global Navigation Satellite System (GNSS) sensor, the method comprising: yawing the nacelle between a series of orientations; obtaining locus data based on a series of calibration positions measured by the GNSS sensor, wherein each calibration position is measured by the GNSS sensor when the nacelle is in a respective orientation of the series of orientations; storing the locus data; after storing the locus data, measuring a new position with the GNSS sensor; and determining the orientation of the nacelle on the basis of the stored locus data and the new position.