A rotor blade having a rotor blade trailing edge which extends between a rotor blade root and a rotor blade tip over a rotor blade length, and having a profile depth which is established between the rotor blade trailing edge and a rotor blade leading edge. For the purpose of improving efficiency, at least one profile element having a continuous profile section, for the purpose of changing the profile depth of the rotor blade, is able to be attached at or in the region of the rotor blade trailing edge, wherein the extension of the profile section beyond the rotor blade trailing edge is determined in a manner dependent on a standardized load-dependent dimensioning of the profile depth of the rotor blade and a load level which is established at an erection location of the wind turbine.

Provided is a rotor blade for a wind turbine, with a trailing edge including a trailing edge core having several core elements arranged side by side, and with an inner and an outer laminate, wherein one core element is split into two element parts separated by a slit, whereby, seen in the direction from a blade root to a blade tip, the inner laminate runs into and through the slit and becomes the outer laminate.

A method of installing a rotor on a nacelle (44) on a wind turbine generally includes providing a rotor hub counterweight assembly (10, 10′) which are rotated and lifted from a downtower location to an uptower location at which wind turbine blades (50, 52, 54) are progressively attached and the counterweights (14, 16), (14′, 16′) are progressively removed. The rotor hub and counterweight assembly (10, 10′) for use when installing a rotor on a wind turbine (46) generally includes a rotor hub (12) having first, second and third flanges (18, 20, 22), a first counterweight (14, 14′), a second counterweight (16, 16′), and a lifting apparatus connecting member (26, 26′). A lifting apparatus connecting member (26) is configured with at least two connection points (60, 62) being configured for allowing at least two of three operations including installation, rotating and lifting the rotor hub (12), and removal of the lifting apparatus connecting member (26′).

A wind-energy-power-generating device is disclosed for flotation on a body of water. The device includes a turbine assembly having rotor blades rotating about a rotation axis for harnessing kinetic energy from an airflow. The device includes a cowl at least partially surrounding said turbine assembly and defining an airflow passageway between a cowl inlet and outlet, having an inlet and outlet axis, respectively. The inlet and outlet axis intersect at a redirect angle. The device includes a base platform adapted to support the turbine assembly and cowl on the water. The cowl is rotatably mounted on the base platform such that it is rotatable around the turbine assembly to self-align with a wind direction. Stabilising arms extend from the base platform and are spaced circumferentially around a platform axis, to stabilise it on the water. A wind-energy-power-generating device secured to the ground or other fixed non-floating structure is also described.

Wind turbines including a hub rotatably mounted on a frame are disclosed, wherein the hub includes a bearing arranged around the frame, a main hub body extending in an axial direction from a front end to a rear end, and including a central opening for fitting the main hub body around the bearing. A bearing adapter is attached to the bearing, and the bearing adapter is in contact with and fixed to an axially facing surface of the main hub body. Also methods for mounting are disclosed.

A planetary transmission includes a ring gear holder and a ring gear for accommodating at least one planetary gear. The ring gear holder can be connected to a housing component at its end face, and a plurality of recesses for accommodating fastening means are embodied at an end face of the ring gear holder. Accommodated in at least one of the recesses is a hollow element, in which a fastening screw is accommodated. The hollow element establishes a positive-fit engagement between the ring gear holder and the housing component.

A rotor blade for a wind energy installation includes a blade root, a blade tip, and at least one rotor blade shell extending in a longitudinal direction from the blade root to the blade tip, and having an inner shell region and an outer shell region. The inner shell region includes a first fiber composite with at least two first fiber layers, and the outer shell region includes a second fiber composite with at least two second fiber layers. The first and second fiber layers extend substantially in the longitudinal direction. At least a first fiber layer of the first fiber composite terminates in the region of at least one end position in the longitudinal direction, whereas the remaining first fiber layers extend beyond the end position. At least a second fiber layer of the second fiber composite terminates in the region of the end position in the longitudinal direction, whereas the remaining second fiber layers extend beyond the end position.

The present invention discloses methods and systems for detecting the health status of a bolt which fastens a rotor blade of a wind turbine. Values of the axial stress/strain of the bolt and motion and orientation data are acquired in different aerial orientations. Values of the prestress/strain and load-stress/strain are obtained using the values of the axial stress/strain and the motion and orientation data. Values of the prestress/strain and load-stress/strain are compared with the reference values. The health status of the bolt, rotor blade, and the wind turbine system is determined based on the comparison results. The method is noninvasive and doesn't affect the function and performance of the bolt and the turbine system.

A rotor lock assembly for locking a rotor of a wind turbine includes at least one removable rotor lock. The removable rotor lock has a housing comprising an opening and a mounting portion, a pin shaft positioned within the opening, and a locking mechanism. The opening extends from a first end to a second end thereof. The mounting portion is adapted for mounting to a bearing housing adjacent to a rotor lock plate of the rotor.

A system and method are provided for controlling low-speed operations of a wind turbine electrically coupled to an electrical grid. The wind turbine includes a generator and a power converter. The generator includes a generator rotor and a generator stator. An operating parameter of the generator rotor is indicative of a low-speed operation of the generator. Accordingly, the crossing of a first threshold by the operating parameter is detected. In response, at least a portion of a required reactive power generation is developed via the generator rotor. The portion is then delivered to the electrical grid via the grid side of the power converter.