Nordex Energy

Method of manufacturing a half shell of a wind turbine rotor blade (110), the method comprising the following steps: a) providing a mold for the half shell, b) placing a fiber layer into the mold, c) placing a stack of prefabricated pultruded planks and a core element on top of the fiber layer, wherein the core element has an end face, said end face having at least two projections being integrally formed with the core element, and the core element is arranged with the end face on a lateral side of the stack in such a way that by means of the at least two projections a gap is formed between the core element and the stack, and d) supplying resin into the mold during a vacuum infusion process.

A present disclosure refers to a hub (1) for a rotor (110) of a wind turbine (100), comprising a hub body (2) with a first flange (3) configured for attaching the hub body to a rotor shaft of the wind turbine and with at least one second flange (5) configured for supporting a rotor blade, the at least one second flange defining a second flange area (6) of the hub body, further comprising at least two stiffening elements (7) extending within at least a portion of the second flange area each stiffening element adjoining the hub body at at least two joints (8), wherein each stiffening element extends in a length direction with reference to an extension direction (S-S) of the rotor shaft.

The present disclosure relates to a support assembly (202) for a wind turbine (100), comprising: - a first support structure (218) for supporting a main bearing housing (204) and a gearbox (206) of the wind turbine, and - a second support structure (220) which is configured to be rotatably mounted on top (103) of a tower (102) of the wind turbine (100) with the bottom side and which is configured to be mounted with the first support structure (218), - wherein the first support structure (218) comprises a surface (222) for the support of the gearbox and a first supporting section (224) below that surface (222), - wherein the second support structure (220) comprises a second supporting section (226) which is arranged directly below the first supporting section (224). The dislosure further relates to a wind turbine with a support assembly.

The present disclosure relates to a support assembly (200) for a wind turbine (100), comprising: - a first support structure (202) configured for supporting at least a rotor assembly, in particular a rotor bearing arrangement (206) of the wind turbine, and - a second support structure (204) which is configured to be rotatably mounted on top (103) of a tower (102) of the wind turbine (100), the tower (102) defining an axis (A-A), wherein the second support structure (204) is configured to support the first support structure, (202) - wherein the second support structure (204) is configured to form a plurality of support interfaces (216) with the first support structure (202). The present disclosure further relates to a wind turbine and method of assembling a support assembly.

A method for determining a wind sector distribution comprising a plurality of wind sectors WS_n, with n = 1, ..., N, for the operation of a wind turbine (100) a wind turbine (100) and a control system (200) are specified, the method comprising the steps (S1, S2) of providing wind condition information (I_wc) representative of average wind conditions at the location of the wind turbine (100), and performing an optimization routine (OR) for maximizing an estimated annual energy production AEP of the wind turbine (100) based on the wind condition information (I_wc) and the plurality of wind sectors WS_n, wherein the optimization routine (OR) comprises determining the plurality of wind sectors WS_n, wherein for each wind sector WS_n an effective turbulence intensity I_eff_n, based on the wind condition information and an admissible turbulence intensity I_design_n, is determined, wherein each of the admissible turbulence intensities I_design_n corresponds to a specific power mode and is based on a plurality of design parameters of the wind turbine (100), a turbulence intensity ratio TIR_n = I_eff_n/I_design_n is determined for each of the wind sectors WS_n, and the optimization routine is performed with the constraint that a weighted combination of the turbulence intensity ratio TIR_n of all wind sectors WS_n is equal to or less than 1.

The method is for operating an energy storage system (200) which comprises an energy storage device (240) having a serial connection of energy storage cells (242). The energy storage system further comprises a plurality of contact points (244, 246, 248) across the serial connection for measuring a parameter (P) as well as a charging circuit (214) for charging the energy storage device. The method comprises a step of providing first information (I1) which is representative of an outcome of an operation performed on at least one measured value (M) of the parameter across at least one pair of contact points. In a further step, second information (I2) is provided which is representative of an outcome of an operation performed on at least one reference value (D) of the parameter across the at least one pair of contact points. The at least one reference value is the value of the parameter expected when the energy storage device is of a predefined type. Third information (I3) is determined depending on the first and the second information. The third information is representative of whether the energy storage system is of the predefined type. In a further step, operating information (OI_1, OI_2, OI_3) for the charging circuit is determined depending on the third information.

A method for compensating a misalignment of at least one component (1, 2) of a wind turbine (100) is specified, the method comprising - providing first information (I1) which is representative of at least one image (P1, P2) taken with an image capturing device (5) and indicating an arrangement of a first component (1) of the wind turbine (100) relative to a second component (2) of the wind turbine (100), - providing second information (I2) which is representative of at least one reference image (R1, R2) which corresponds to the at least one image (P1, P2), - comparing the first information (I1) to the second information (I2) and, based on the comparison, determining whether a misalignment of the first component (1) relative to the second component (2, 3) exists, and, - in case a misalignment is determined, executing a measure (M) to compensate the misalignment of the first component (1) relative to the second component (2).

A wind turbine rotor blade comprising a blade root, a blade tip, a leading edge, a trailing edge, a suction side, a pressure side (22) and a heatable surface area including at least one electrical heating element, wherein the heatable surface area covers a section of the leading edge and has a first edge facing the blade tip, a second edge facing the blade root, a third edge arranged on the suction side and a fourth edge arranged on the pressure side (22), characterized in that the wind turbine rotor blade comprises a first layer of an electrically insulating material, wherein the first layer is smaller than the heatable surface area and is arranged on top of the at least one electrical heating element along the leading edge and such that it extends beyond the first edge.

A serrated panel for a trailing edge of a wind turbine rotor blade, the serrated panel comprising • a plurality of teeth, each tooth having a tip, a base, two edges running from the tip to the base, a longitudinal axis, a pressure side surface and a suction side surface, and • a plurality of vanes arranged side by side with a gap between adjacent vanes, each vane beginning at one of said edges and extending in a rearward direction, wherein each vane has a vane length, a vane width and a vane height, characterized in that • the pressure side surfaces and/or the suction side surfaces of the teeth comprise wave elements beginning at or near one of the edges and extending in a forward direction, wherein each wave element has a crest which is aligned with one of the vanes and a wave element width which is larger than the vane width.

A serrated panel for a trailing edge of a wind turbine rotor blade, the serrated panel comprising• a plurality of teeth, each tooth having a tip, a base, two edges running from the tip to the base, a pressure side surface and a suction side surface, and• a plurality of vanes arranged side by side with a gap between each pair of adj acent vanes, each vane beginning at one of said edges and extending rearwards in a longitudinal direction, wherein each vane has a vane length, a vane width and a vane height, characterized in that• the pressure side surfaces of the teeth comprise a base surface and a plurality of humps, wherein each hump has a crest and a sloped, circumferential surface that transitions smoothly into the base surface.