Abstract: A safety door assembly for a hoist window of a structure includes a sliding door arranged to reveal or conceal the hoist window; and a barrier assembly which is closed to inhibit access to an area in front of the hoist window or opened to permit access to the area in front of the hoist window; and wherein the barrier assembly is adapted to prevent the sliding door from revealing the hoist window when the barrier assembly is open; and the sliding door is adapted to prevent opening of the closed barrier assembly when the sliding door reveals the hoist window.

Abstract: Provided is a method for determination of a location of a short circuit fault in a generator arrangement, wherein the generator arrangement includes an electrical machine and at least one channel, wherein the or each channel includes a breaker, a converter unit and a set of stator windings of the electrical machine connected to the converter unit via the breaker, wherein upon an occurrence of a short circuit in a channel, the connection between the set of stator windings and the converter unit is interrupted by opening the breaker, wherein depending on at least one measured signal of a measurand, wherein the measured signal is measured by at least one sensor of the electric machine and wherein the measurand describes a torque ripple of the electrical machine, either the electrical machine or the converter unit of the channel is determined as location of the short circuit fault.

Abstract: A thermal assembly of a wind turbine is provided, including an external liquid-to-air heat exchanger arranged to lower the temperature of a liquid coolant in a coolant circuit which coolant circuit is arranged to convey the liquid coolant to a number of heat-dissipating components during operation of the wind turbine; and a thermal assembly control arrangement realized to exclude the external liquid-to-air heat exchanger from the coolant circuit during an off-grid mode of the wind turbine. Also provided is a method of operating a wind turbine in an off-grid mode, the wind turbine including an embodiment of such a thermal assembly.

Abstract: Provided is a wind turbine including multiple components generating heat during operation of the wind turbine and a liquid cooling system, wherein the multiple components are thermally coupled by a liquid coolant cycle of the liquid coolant system to an ambient heat exchanger of the liquid coolant system, the ambient heat exchanger being arranged to exchange heat between a liquid coolant contained in the liquid coolant cycle and ambient air, whereby the liquid coolant system includes a heat pump having a cooling operation mode, wherein the heat pump is arranged in the coolant liquid cycle such that the liquid coolant of the liquid coolant cycle is cooled, when the heat pump is operated in the cooling operation mode. Also provided is a method for operating the wind turbine.

Abstract: A method of controlling a wind turbine includes the step of boosting the output power of the wind turbine above the nominal power of the wind turbine, according to a boost operational function representing a boost level for the wind turbine. The boost operational function is a crescent function of an operational variable at least between a first threshold value and a second threshold value of the operational variable.

Abstract: A wind turbine component adapted to be attached to a wind turbine, wherein the component is a cover element adapted to cover at least one part of a wind turbine or an aerodynamic element adapted to be attached to a rotor blade of a wind turbine, wherein the component includes a main body with a continuous and at least partly curved surface, wherein the main body is formed by a layer stack including a plurality of layers, wherein at least two of the layers are of a different material.

Abstract: A stator segment for an electric machine, in particular for a wind turbine generator is provided, the stator segment including a support structure, a lamination stack, and at least one fastening member for fastening the lamination stack to the support structure, wherein the lamination stack includes a plurality of lamination packets stacked between a drive end and a non-drive end, each lamination packet including a yoke having a plurality of teeth extending radially outwards on one side of the yoke and a connection structure formed at the side opposite the teeth, the connection structure being shaped to engage with the at least one fastening member in such a way that a part of the fastening member extends within the yoke. Furthermore, a stator, a wind turbine and a method of manufacturing are provided.

Abstract: A self-clamping cable guard for clamping power cables of a power cable bundle of a cable support arrangement in a wind turbine, whereby the self-clamping cable guard includes three recesses arranged about a central longitudinal axis of the self-clamping cable guard for positively clamping a power cable of the power cable bundle inside of each of the three recesses, and whereby the self-clamping cable guard includes three wear protection plates arranged about the central longitudinal axis, whereby each of the three recesses includes an open side for insertion of a respective power cable of the power cable bundle therein, each of the open sides of one of the three recesses being respectively limited by two of the three wear protection plates to protect the power cables clamped inside the recesses from wear. A cable support arrangement for a wind turbine and a wind turbine is also provided.

Abstract: Provided is a method for repairing a root of a rotor blade of a wind turbine, the root including several bores for receiving a bolt and extending form the root front surface into the blade, wherein at least a part of the front surface blade material surrounding the bore is removed using a removing tool and that at least one shim plate is attached to the processed front surface surrounding the bore.

Abstract: A fault gas detection system for a liquid filled high voltage transformer, the transformer including a main tank and an expansion tank the tanks fluidic connected by an exchange conduit such that gas and/or a transformer liquid is able to exchange between the tanks, the gas detection system including: a chamber with a top cover, a predefined horizontal level-plane in the chamber defining a maximum liquid level of a transformer liquid in the chamber during use, a fluid-channel including a fluid-egress at a level equal to or higher than the top cover and a fluid-ingress lower than the level of the level-plane, a level sensor designed to measuring and/or indicating a liquid level. A respective transformer and a respective wind turbine system is also provided.

Abstract: A method of controlling a wind turbine by adjusting a blade pitch angle and at least one blade add-on of at least one wind turbine rotor blade has the blade add-on, the method including: adjusting a setting of the add-on to meet a control objective while temporarily maintaining a setting of the blade pitch angle.

Abstract: A method of operating a wind turbine in an active idle mode is provided, the wind turbine including a rotor hub with a plurality of blades which are configured to be pitched. The method including the following steps: detecting a fault of the wind turbine; determining a number of faulty blades, whose pitching operation is faulty or affected by a fault; and operating the wind turbine in the active idle mode based on the determined number of faulty blades.

Abstract: A rotor for an electric machine, especially a generator of a direct drive wind turbine, includes a cylindrical rotor housing with several magnet means arranged at the inner housing surface, wherein each magnet means includes several magnet elements arranged in a row parallel to an axis of rotation, wherein the inner housing surface is provided with at least one groove-like recesses extending parallel to the axis of rotation, wherein each recess is covered by the magnet elements of a row, and wherein at least two magnet elements in at least some of the rows are arranged with at least one gap extending in the circumferential direction, which gap communicates with the respective recess.

Abstract: A wind turbine includes a generator, a base, a nacelle, a tower having a first end mounted to the base and a second end supporting the nacelle, and an electrolytic unit electrically powered by the generator to produce hydrogen from an input fluid, in particular water, wherein the electrolytic unit is electrically coupled to the generator by an electric connection, wherein the electrolytic unit is housed in a housing, wherein the housing includes a pressure-relief section configured to detach from the housing in the event of an explosion inside the housing or when the pressure inside the housing exceeds a predetermined pressure.

Abstract: A method of performing a black start in a wind farm is provided, the wind farm including a primary black start enabled wind turbine, at least one secondary black start enabled wind turbine, and a wind farm grid interconnecting at least a part of the wind turbines in the wind farm, the method including (a) starting the primary black start enabled wind turbine in black start mode in order to supply voltage to the wind farm grid, (b) monitoring, at the at least one secondary black start enabled wind turbine, an electric parameter value in the wind farm grid, and (c) starting the at least one secondary black start enabled wind turbine in black start mode in order to supply voltage to the wind farm grid when the monitored electric parameter value meets a predetermined condition. A corresponding wind farm is also provided.

Abstract: A strip for a spar cap is provided, wherein the strip is made from a composite material including a matrix and a reinforcement, and includes a first and second end region connected together in a longitudinal direction by an intermediate region having two mutually opposed longitudinally extending and parallelly disposed intermediate surfaces, wherein a thickness is determinable perpendicular to the two intermediate surfaces and a width is determinable perpendicular to the longitudinal direction and perpendicular to the thickness, wherein at least one of the first and the second end regions is a chamfered end region, wherein the at least one chamfered end region is simultaneously chamfered along the width and the thickness, wherein the at least one chamfered end region has a first edge at the intermediate region and a second edge at its free end, wherein the first edge and the second edge are substantially parallel to one another.

Abstract: A method of determining a frequency of an oscillating movement of a wind turbine tower. The wind turbine tower includes a nacelle and a generator including a stator and a rotor, the oscillating movement causing a rolling movement of the nacelle, the method including obtaining a first signal indicative of rotor speed relative to the nacelle, obtaining a second signal indicative of rotor speed relative to ground, determining a first amplitude spectrum based on the first signal, determining a second amplitude spectrum based on the second signal, determining a difference function based on the first amplitude spectrum and the second amplitude spectrum, and determining the frequency of the oscillating movement of the wind turbine tower as a frequency corresponding to a peak in the difference function. A device for determining a frequency of an oscillating movement.

Abstract: Provided is a method of manufacturing an adaptable pre-cast resin-infused carbon-fiber beam, which method includes the steps of arranging a plurality of elongate carbon-fiber blocks side by side; arranging sheets to enclose the blocks and to extend over opposing faces of adjacent blocks; arranging the sheets to converge as an outwardly projecting elongate bead at a junction between adjacent blocks; and pulling on the elongate bead to inhibit resin flow between blocks during a resin infusion step. Also provided is a pre-cast adaptable carbon-fiber beam manufactured using that method; a method of manufacturing a wind turbine rotor blade; and a wind turbine rotor blade.

Abstract: A method of activating and/or deactivating a safe mode of operation of a wind turbine is provided, the method including: receiving at least one measurement signal related to a weather condition; filtering of a measuring signal dependent quantity to obtain a filtered signal, wherein the filtered signal depends on whether the measuring signal dependent quantity and/or filtered signal is increasing or decreasing with time; activating and/or deactivating the safe mode of operation based on the filtered signal.

Abstract: A support structure for supporting a lamination stack and a winding structure in order to form a stator segment for an electric machine, in particular a wind turbine generator including (a) a frame including two parallel end plates and two side plates, the side plates extending between corresponding end portions of the end plates, (b) a plurality of internal connecting members extending within the frame between the end plates, and (c) a plurality of external connecting members extending outside of the frame, each external connecting member forming an extension of a corresponding internal connecting member beyond one of the end plates, wherein (d) the internal and external connecting members are adapted to engage with corresponding fastening members for securing a lamination stack. A stator segment, a wind turbine generator, and a method of manufacturing a support structure are also described.