Abstract: Rotor blade for a wind power installation, rotor for a wind power installation, and wind power installation. The disclosure relates in particular to a rotor blade for a wind power installation, having a rotor blade length, having a profile depth established between a leading edge and a trailing edge, and having a profile thickness established between a suction side and a pressure side, wherein the rotor blade has a trailing edge region, which adjoins the trailing edge and extends with a region extent of less than 20%, in particular less than 10%, of the profile depth in the direction of the leading edge, wherein the trailing edge region has at least one acoustic opening.

Abstract: Provided is a method for operating a wind turbine that includes a rotor operable with variable rotor speed and having rotor blades with adjustable pitch angles. Wind causes a rotor thrust acting on the rotor depending on the rotor speed and depending on a common pitch angle. In partial load, when the wind is below rated speed, the turbine is controlled by a rotor speed curve, defining the rotor speed for each operating point of the turbine. In a normal mode when the operation of the turbine is not throttled, a normal rotor speed curve in combination with a normal common pitch angle is used, and in a throttled mode when the thrust is to be limited, a throttled rotor speed curve, different from the normal rotor speed curve, in combination with a throttled common pitch angle, different from the normal common pitch angle, is used to reduce the thrust.

Abstract: Rotor blade for a wind power installation, rotor for a wind power installation, and wind power installation. The disclosure relates in particular to a rotor blade for a wind power installation, having a rotor blade length, having a profile depth established between a leading edge and a trailing edge, and having a profile thickness established between a suction side and a pressure side, wherein the rotor blade has a trailing edge region, which adjoins the trailing edge and extends with a region extent of less than 20%, in particular less than 10%, of the profile depth in the direction of the leading edge, wherein the trailing edge region has at least one acoustic opening.

Abstract: Provided is a method for operating a wind turbine that includes a rotor operable with variable rotor speed and having rotor blades with adjustable pitch angles. Wind causes a rotor thrust acting on the rotor depending on the rotor speed and depending on a common pitch angle. In partial load, when the wind is below rated speed, the turbine is controlled by a rotor speed curve, defining the rotor speed for each operating point of the turbine. In a normal mode when the operation of the turbine is not throttled, a normal rotor speed curve in combination with a normal common pitch angle is used, and in a throttled mode when the thrust is to be limited, a throttled rotor speed curve, different from the normal rotor speed curve, in combination with a throttled common pitch angle, different from the normal common pitch angle, is used to reduce the thrust.

Abstract: A method for operating a wind power installation having a rotor and a generator driven via the rotor for generating electrical power, in which provides for an adapted rotational speed of the rotor of the wind power installation for generating electrical power to be output to be specified using the adapted operational management and therefore using the air density relevant to the wind power installation, wherein, for generating optimized electrical power to be output, the adapted rotational speed is an increased rotational speed for a reduced air density or a reduced rotational speed for an increased air density, wherein additionally or alternatively a sound emission of the wind power installation is determined for the specified adapted rotational speed of the rotor using the air density relevant to the wind power installation, and the adapted rotational speed is corrected, in particular on the basis of the determined sound emission, using the air density relevant to the wind power installation.