Abstract:
The invention relates to a method for testing yaw system operation of a multi- rotor wind turbine. The multi-rotor wind turbine comprises a tower with a support structure, at least two wind turbine modules mounted to the support structure and a yaw system arranged to enable rotation of the support structure around the tower. The method comprises applying a yaw moment on the yaw system in order to rotate the support structure, increasing the applied yaw moment towards a yaw moment threshold, measuring a yaw parameter indicative of yaw movement, and determining a condition of the yaw system based on the measured yaw parameter.
Abstract:
A wind turbine system comprising a plurality of wind turbine modules mounted to a support structure, wherein each of the wind turbine modules comprises a rotor including one or more variable-pitch blades, each defining a respective blade pitch angle and being controlled by a pitch control system, and a control system operable to control the blade pitch angles of the 10 plurality of blades of the wind turbine modules. The control system is configured to identify the presence of a predetermined stop condition and, in dependence thereon, is operable to control the blade pitch angles of the respective blades to predetermined stop positions that reduce oscillation of the support structure. Aspects of the invention also relate to a method of controlling a wind turbine system, to a controller for implementing the method, and to a 15 computer program product.
Abstract:
The present invention provides a segmented pitch ring for use in a blade pitch system of a wind turbine. The segmented pitch ring is formed of a plurality of segments manufactured by different processes. In particular,one or more of the segments are formed by a rolling process,and one or more of the segments are formed by a casting process. The segments are arc-shaped or include arc-shaped sections that in combination define a substantially circular circumference of the pitch ring.
Abstract:
The present invention relates to a rope-driven transmission for a wind turbine. The transmission comprises an input rotary member for being operatively connected to a rotor of a wind turbine and in rotational connection with at least one secondary shaft which is arranged in parallel with the rotational axis of said input rotary member, wherein said secondary shaft is adapted for operative connection with an output member of at least one electrical generator, wherein said rotational connection between said input rotary member and said at least one secondary shaft is provided by a rope, the course of said rope defining a rope path, and wherein said rope path includes a plurality of turns around said input rotary member and said secondary shaft. The transmission facilitates an easy monitoring and maintenance of the transmission. The invention further relates to a method of maintaining the transmission by replacing the rope. The invention further relates to a wind turbine generator comprising the transmission.
Abstract:
A wind turbine (10) supported by a plurality of cables (20). The wind turbine (10) includes a tower (12) fixed at one end to a foundation (16) and including at least two tower sections (12a, 12b, 12c), including an upper section and a lower section. Each of the upper and lower sections includes an inwardly directed flange (82, 90) having a plurality of through-bores (84, 92). The inwardly directed flange (90) of the lower section further includes a plurality of second bores (104) spaced apart from the plurality of through-bores (92). An interface module (18, 120) is secured between the upper and lower section and includes a ring (62) from which one or more ears (50, 204) extend outwardly, each ear (50, 204) being configured to be coupled to one of the plurality of cables (20). The ring (62) includes a plurality of through-bores (72) that align with the through-bores (84, 92) in the inwardly directed flanges (82, 90) of each of the upper and lower tower sections and a plurality of additional bores (96) that align with the plurality of second bores (104) in the inwardly directed flange (90) of the lower section. A method of installing a wind turbine (10) having a cabled tower (12) is also disclosed.
Abstract:
A wind turbine nacelle configured for mounting on a wind turbine tower and for supporting a rotor-supporting assembly, the nacelle comprising a main unit, and at least one auxiliary unit. To increase flexibility and improve assembly and maintenance procedures of the wind turbine, the auxiliary unit comprises at least two sub units each accommodating at least one wind turbine component, e.g. a converter or a transformer. The sub units are attached individually to the main unit or they are joined and attached as one component to the main unit.
Abstract:
A first aspect of the invention provides a method of testing a yaw system (200) of a wind turbine, the wind turbine comprising a rotor; the yaw system (200) comprising a yaw gear (202) coupled to the rotor so that rotation of the yaw gear (202) causes yaw rotation of the rotor, and first and second sub-systems (204a, 204b), the first sub-system (204a) comprising a first pinion gear (206a) and a first drive motor (208a) coupled to the yaw gear (202) by the first pinion gear (206a), the second sub-system (204b) comprising a second pinion gear (206b) and a second drive motor (208b) coupled to the yaw gear (202) by the second pinion gear (206b). The method comprises the steps of: testing the first sub-system (204a) by: applying a first yaw moment to the yaw gear (202) with the second drive motor (208b) via the second pinion gear (206b), reacting the first yaw moment with the first pinion gear (206a), monitoring a yaw motion parameter indicative of rotation of the yaw gear (202), and determining a condition of the first sub-system (204a) based on the monitored yaw motion parameter.
Abstract:
A logistics system for a multirotor wind turbine (1) is disclosed. The multirotor wind turbine (1) comprises two or more energy generating units (4), each mounted on an arm (3) extending from a tower (2) of the multirotor wind turbine (1). A transport system (14, 30, 31, 32, 33, 34, 36) interconnects a lower interior part of the tower (2) with each of the energy generating units (4). A plurality of transport containers (15) is connectable to the transport system (14, 30, 31, 32, 33, 34, 36) and configured to hold equipment (26) to be transported. A control unit is configured to receive information regarding contents and position of the transport containers (15), and to plan transport of the transport containers (15) via the transport system (14, 30, 31, 32, 33, 34, 36), based on a service plan for the multirotor wind turbine (1).
Abstract:
A retrofitted wind turbine installation for replacing a prior wind turbine installation includes the foundation of the prior wind turbine installation and a replacement wind turbine supported by the foundation, wherein the tower of the retrofitted wind turbine installation is a cable-stayed tower to reduce the bending loads imposed on the foundation. A method of retrofitting an existing wind turbine installation with a replacement wind turbine includes disassembling at least a portion of the existing wind turbine, assembling a replacement tower to a remaining portion of the existing wind turbine installation, attaching a plurality of stay cables between the tower of the retrofitted wind turbine installation and stay cable foundations, and attaching the replacement energy generating unit to the replacement tower.
Abstract:
The invention relates to a method for controlling the operation of a number of airborne wind energy systems arranged in a wind energy park, where each airborne wind energy system comprising a wind engaging member being coupled to a ground station via a cable. The method comprises determining a wind speed and a wind direction and the determination over a time interval of a number of positions of the wind engaging member of a first airborne wind energy system. Based on these determined parameters and on a predetermined wake angle, a wake corridor of the wind engaging member is determined, and used in the controlling of a second airborne wind energy system positioned in a downwind direction relative to the first airborne wind energy system. The controlling comprises steering the wind engaging member of the second airborne wind energy system into a position outside at least a first part of the wake corridor of the first airborne wind energy system.