Vestas Wind Systems

A method (20) of designing a wind turbine component, comprising, for each of a plurality of defined quantiles of a turbulence distribution describing wind turbulence level at a given wind speed (201), determining (202) the turbulence level at the respective defined quantile, simulating (203) wind turbine operation with the determined turbulence level, determining (204) a fatigue loading level experienced by the wind turbine at the determined turbulence level, and applying (205) a defined probability to the determined fatigue loading level to obtain a weighted fatigue loading level. These weighted fatigue loading levels are combined to obtain (206) an overall fatigue loading level for the given wind speed. The process is repeated for different wind speeds, and a design load for fatigue loading of the wind turbine is determined (208) based on the overall fatigue loading levels for different wind speeds. A wind turbine component is designed (209) in accordance with the determined design load.

The invention relates to designing a wind turbine component. For a given defined load case, the invention involves, for each of a plurality of defined operational parameter values, simulating wind turbine operation at the respective operational parameter value, and determining, based on simulation output, a characteristic extreme load at the respective operational parameter value. At the defined design load, the invention involves obtaining a combined characteristic extreme load for the respective defined load case using a combining function that depends on the determined characteristic extreme load, and a defined probability of wind turbine operation, at each respective operational parameter value. This is repeated for different design loads, and the invention involves determining a design load for extreme loading based on the combined characteristic extreme loads for the respective load cases. The wind turbine component is designed in accordance with the determined design load.

A method for collecting analysis data from at least one wind turbine (2) is disclosed. A baseline (9) representing normal behaviour of the at least one wind turbine (2), including patterns for switching between operating states of the at least one wind turbine (2), is established. During operation of the at least one wind turbine (2), operating data is collected from the at least one wind turbine (2), the operating data including data related to operating states of the at least one wind turbine (2). The collected operating data is compared to the patterns for switching between operating states defined by the baseline (9), and in the case that the collected operating data for one of the at least one wind turbines (2) deviates from the patterns for switching between operating states defined by the baseline (9) by at least a threshold amount, a campaign for collecting analysis data from at least that wind turbine (2) is initiated.

The present invention relates to structurally designing a wind turbine system including setting a ramp-down wind speed of the wind turbine system. A method is disclosed where wind speed distribution data of a site of the wind turbine system, structural design parameters and a measure for power generation from wind turbines in a defined geographic region are obtained. Based on the measure for power generation, a maximal desired power generation from wind turbines in a geographic region of the wind turbine system is obtained, and a wind speed is determined where the maximal desired power generation is reached. A ramp-down wind speed of the wind turbine system is set to the determined wind speed. In embodiments a target power may be increased above a reference power for a wind speed in a wind speed range, such as in a knee region of the power curve.

A method for handling physical intrusion in a wind turbine (1) is disclosed. An intrusion detection system (3) detects an intrusion event in the wind turbine (1), generates a first intrusion alert signal and provides the first intrusion alert signal to a control system (4) of the wind turbine (1). In response to receiving the first intrusion alert signal, the control system (4) initiates at least one safety action at the wind turbine (1), wherein the at least one safety action comprises stopping power production of the wind turbine (1) and providing a second intrusion alert signal to an intrusion monitoring system (6). The intrusion monitoring system (6) communicatively isolates the wind turbine (1).

In a first aspect of the present invention there is provided a wind turbine comprising a hub assembly, a blade part attached to the hub assembly, and a displacement sensor array comprising a plurality of displacement sensors. Each displacement sensor is attached to one of the blade part or the hub assembly. Each displacement sensor comprises a physical contact probe which is slidable along a probe axis in a probe direction. The physical contact probe of each displacement sensor physically contacts the other of the blade part or the hub assembly such that the displacement sensor is arranged to detect relative movement between the blade part and the hub assembly in the probe direction.

A method and a system (1) for controlling transfer of a suspended load (2) between an offshore wind turbine (3) and a floating vessel (4) are disclosed. Movements, relative to the floating vessel (4), of a load (2) suspended in a hoisting mechanism (6, 15) and/or of a hooking part (9) of the hoisting mechanism (6, 15), are detected. A position and/or inclination of a landing platform (8) arranged on the floating vessel (4) is adjusted, based on the detected movements, in order to compensate for relative movements between the floating vessel (4) and the suspended load (2) and/or the hooking part (9), thereby synchronizing movements of the landing platform (4) to movements of the suspended load (2) and/or the hooking part (9), while moving the suspended load (2) and/or the hooking part (9) towards the adjustable landing platform (8). The step of detecting movements of a load (2) suspended in the hoisting mechanism (6, 15) and/or of a hooking part (9) of the hoisting mechanism (6, 15) comprises detecting the movements by means of one or more sensors arranged on the suspended load (2) and/or the hooking part (9). A step of communicating sensor readings from the one or more sensors to a control unit for controlling the adjustable landing platform (8) is further comprised

In a first aspect of the present invention there is provided a blade for a wind turbine. The blade extends from a blade root defining a radial position r=0 to a blade tip defining a radial position r=R. The blade comprises a windward side and a leeward side which meet at a leading edge and a trailing edge to define an airfoil profile. A chord is the distance between the leading and trailing edges, and a relative thickness is the ratio of thickness to chord. The airfoil profile has a thickness being the greatest distance between the windward and leeward sides orthogonal to the chord. The blade comprises a connection point located at a first radial position (r1) between the blade root and the blade tip for connection of one or more blade connecting members for being connected between the connection point and a corresponding connection point on a neighbouring blade. The thickness and/or the relative thickness of the blade is substantially constant or has a local minimum within an inboard portion of the blade between the blade root and the connection point.

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