Repower Systems Ag

General Electric Company

Senvion Se

Senvion Gmbh

Repower Systems Se

Martin Von Mutius

Dirk Steudel

Jens Altemark

Ulrich Uphues

Marc Seidel

Alf Trede

Roland Weitkamp

Matthias Peters

Jochen Anemueller

Stefan Steiner

Patrik Achenbach

The invention concerns a method for the determination of an azimuth angle for servicing purposes (&#x3b1;) of a wind power plant with a machinery housing that is rotatable on a tower through an azimuth angle (&#x3b1;) and a rotor that is rotatable on a machinery housing through a rotor angle (&#x3b4;) such that a plurality of combinations of rotor angles (&#x3b4;) and azimuth angles (&#x3b1;) is adjusted, that are determined at the rotor subject to the influence of a turbulent wind field, which is effecting torques, for the adjusted combinations of rotor angles (&#x3b4;) and azimuth angles (&#x3b1;) and the associated azimuth angle (&#x3b1;), a torque envelope of the torque-azimuth angle associations is determined, surrounding areas (U(&#x3b1;)) with comparable sector sizes of the azimuth angle (&#x3b1;) are generated and associated magnitude values of the torque envelope are determined, a surrounding area (U(&#x3b1;)) with magnitude-wise smaller torque envelope values than the neighboring surrounding areas is selected and the azimuth angle for servicing purposes (&#x3b1;) is determined within the selected surrounding area (U(a)).

Method of servicing wind power plant using azimuth angle

A method for operating a wind energy installation () with a rotor () and at least one rotor blade (), which can be adjusted in terms of its angle of attack. The rotor blade () is accelerated by virtue of at least five repeated adjustment operations of the angle of attack about its longitudinal axis (), wherein a rotor blade bending vibration with a vibration amplitude and a vibration frequency is excited.

Method for operating a wind energy installation

A wind energy plant comprising a rotor having blades and a generator driven by said rotor for generating electric energy. The pitch of the blades can be adjusted and a pitch system for adjusting the pitch angle of the blades is provided, which is supplied by a hub power source. An additional electric load is provided on the hub. A pitch power control device is provided which dynamically distributes the power of the hub power source between the pitch system and the additional electric load and further acts on the pitch system such that its power consumption during high-load operation is reduced. Thus, the power consumption of the pitch system during high-load operation can be reduced and additional power provided for operating the additional load. Even large additional loads, such as a blade heater, can be operated in this way, without having to boost the hub power source.

Wind energy plant with dynamic power distribution between the pitch system and supplementary electrical load

A method for operating a wind power plant (WEA) before or during the performance of maintenance work on the wind power plant (WEA). At least one physical condition of the surroundings outside the wind power plant (WEA) induced by wind movement outside the wind power plant (WEA) is detected as an external physical condition. At least one physical condition of a component of the wind power plant (WEA) influenced by wind movement outside the wind power plant (WEA) is detected as an internal physical condition. The at least one external physical condition and/or at least one internal physical condition are evaluated. The at least one external physical condition is compared with a predetermined reference value for the external physical condition. The at least one internal physical condition is compared with a predetermined reference value for the internal physical condition. Depending on the comparison, at least one warning message is generated.

Method for the operation of a wind power plant

The invention relates to a method of operating a wind farm intended for connection to an electric power network, which wind farm includes at least three wind turbine generator systems. At least one actual value for a wind speed or a parameter associated with wind speed is determined for each wind turbine generator system which are divided at least temporarily into predetermined groups. A first disconnect value is assigned to one group of wind turbine generator systems and a second different disconnect value is assigned to a second group of wind turbine generator systems. Actual values are assigned to disconnect values, and compared thereto. When the actual value exceeds the disconnect value the associated group of wind turbine generator systems is automatically disconnected.

Wind farm capable of staggered disconnection

A method for operating a wind energy installation and a system for implementing the method. An oblique incident flow value, which represents the difference between the wind direction and the direction of a rotor axis of the wind energy installation, and a load value, which represents the load state of the wind energy installation, are determined. A total load value is determined based on the load value and the oblique incident flow value. The rotor rotation speed is reduced when the total load value is above a first limit value. The wind energy installation is shut down when, in addition, a second limit value is exceeded. The method makes it possible to react objectively to oblique incident flows and can reduce a load on a wind energy installation without causing large yield losses.

Method and system for operating a wind energy installation

The modular kit for a tower has a height ranging between a minimum height and a maximum height, in particular for a wind energy turbine, comprises a first conical tower segment () comprising a steel tube having a predetermined length (), a second conical tower segment () comprising a steel tube having a predetermined length (), and a first cylindrical tower segment () comprising a steel tube having a length between a predetermined minimum length and a predetermined maximum length. The length of the first cylindrical tower segment () can be adapted to the necessary height of the tower between its minimum height and its maximum height. The minimum height is the sum of the predetermined lengths () of the first and second conical tower segments () and the minimum length of the first cylindrical tower segment (). The maximum height is the sum of the predetermined lengths () of the first and second conical tower segments () and the maximum length of the first cylindrical tower segment ().

Modular kit for a wind turbine tower

A method for the operation of a wind power plant) with a rotor (), which has at least one angle-adjustable rotor blade (), wherein the wind power plant () is operated in a first operating mode () and/or a second operating mode (). In the first operating mode () a braking process of the rotor () is initiated when a rotational speed of the rotor () is exceeded, which lies above a first rotational speed threshold value. Also, a method for the operation of a wind power plant () with a rotor (), which has at least one angle-adjustable rotor blade (), wherein an operating parameter is monitored and a braking process of the rotor () is initiated when an operating parameter threshold value is reached.

Wind plant and method of initiating braking actions in different operating modes

The invention relates to a wind turbine and a method for operating the wind turbine planted in the floor of a body of water. The wind turbine includes a support structure and a rotor, which is arranged on the support structure. The rotor has a rotor blade. The wind turbine operates in a trundle mode in order to reduce the oscillations in the support structure created through mechanical impacts on the support structure.

Oscillation damping of a wind turbine

The invention relates to a method for operating a wind energy installation (), in which the wind energy installation () has a rotor (), at least one rotor blade () with an adjustable angle, a mechanical brake device () for braking the rotor (), an operational control device () and a safety system (). The invention also relates to a corresponding wind energy installation (). The method according to the invention is defined by the following method steps: braking of the rotor () by means of an angular adjustment () with an average angular adjustment rate of less than 8.5&#xb0;/s of the at least one rotor blade () after a fault signal () occurs, braking of the rotor () by means of the mechanical brake device () as soon as the rotational speed of the rotor () exceeds a predefinable first rotational speed limit, and triggering of the safety system () as soon as the rotational speed of the rotor () exceeds a predefinable second rotational speed limit.

Method for operating a wind energy installation and a wind energy installation

The invention relates to a method for operating a wind power plant with a rotor and with at least two rotor blades rotatable about a common rotor axis in a rotor blade plane, whereof each can be swivelled about a swivel axis which is roughly parallel to its longitudinal axis approximately perpendicular to the rotor axis, in which the setting or pitch angels of the rotor blades are set with respect to the rotor blade plane as a function of the operating and in particular wind conditions, in which the pitch angels of at least two rotor blades in a parking position of the rotor, in which rotor rotation about the rotor axis is decelerated, are set to different values.

Wind turbine in parked position

The device for adjusting a rotor blade of a wind energy turbine is provided with a driving device () for driving an adjusting element () for selectably rotating the rotor blade () in both directions about its longitudinal axis (), an energy storage unit () and a free-running means () adapted to be selectively activated, said free-running means (), in its activated state, allowing rotation of the rotor blade () by means of energy stored in the energy storage unit () only in one of the two directions up to a desired rotational position.

Growing community of inventors

Ascheffel, Germany

Martin Von Mutius