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US 7,081,689 B2Granted
Control system for a wind power plant with hydrodynamic gear
AssigneeVoith Turbo GmbH & Co. KG
InventorsMartin Tilscher, Andreas Basteck
Life of this patent
Estimating the term…
Abstract
A wind power plant connectable to an electric grid is provided that has at least three control levels. A controller controls an angular position of the rotor blades and/or controls a setting of the reaction member of the hydrodynamic speed transformer and/or controls the power electronics of the generator. The controller is provided with predetermined setpoint characteristics depending on operating states of the wind power plant and/or the electric grid or characteristics of the wind.
Claims12
A wind power plant connectable to an electric grid comprising:
- a first control level having a wind rotor with rotor blades, a power split gear driven at least indirectly by the wind rotor, a hydrodynamic speed transformer and a generator with power electronics, the power split gear having first and second power branches, the hydrodynamic speed transformer having a reaction member that takes up power from the first power branch and produces a feedback of power via the second power branch to the power split gear depending on a setting of the reaction member, the generator being driven at least indirectly by the first power branch and emitting electric power to the electric grid with constant system frequency;
- a second control level having a controller that controls an angular position of the rotor blades or controls a setting of the reaction member of the hydrodynamic speed transformer or controls the power electronics of the generator;
- and
- a third control level activating and deactivating the controller of the second control level or predetermining setpoint characteristics for the controller of the second control level depending on operating states of the wind power plant or the electric grid or characteristics of the wind.
1 more element
A method for the control of a wind power plant comprising:
- controlling a setting of a reaction member of a hydrodynamic speed transformer in a first control level, wherein the first control level comprises a wind rotor with rotor blades, a power split gear driven at least indirectly by the wind rotor, a hydrodynamic speed transformer and a generator with power electronics, the power split gear having first and second power branches, the hydrodynamic speed transformer having a reaction member that takes up power from the first power branch and produces a feedback of power via the second power branch to the power split gear depending on a setting of the reaction member, the generator being driven at least indirectly by the first power branch and emitting electric power to the electric grid with constant system frequency;
- adjusting speed guidance for the power split gear and the hydrodynamic speed transformer based at least in part on power input of the wind rotor;
- controlling an angular position of the rotor blades or controlling the setting of the reaction member or controlling the power electronics of the generator via a controller in a second control level;
- and
- adjusting the controller at the second control level by activating and deactivating, weighting or predetermining according to setpoint characteristics via a third control level depending on operating states of the wind power plant or the electric grid or wind characteristics.
2 more elements
Dependencies are inferred from the claim text.