Vestas Wind Systems

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).

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 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.

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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