Method for operating a wind turbine
AssigneeWobben Properties GmbH
InventorsSönke Engelken, Nikolay Mihov, Angelo Mendonca
Life of this patent
Estimating the term…
Abstract
A method for operating a wind turbine (WEA), which has a generator for supplying electric power to an electric supply grid, is provided. After being operated in a first operating state with a first power output and a first rotational speed, the wind turbine is set to a second operating state with a second power output and a second rotational speed. In order to set the wind turbine to the second operating state, an aerodynamic power output which is available for supply is determined, a target rotational speed is determined from the available output, and a target output to be set for the generator is specified from the target rotational speed.
Claims12
A method for operating a wind power installation, comprising:
- feeding, by a generator, electrical power into an electrical supply network with a first operating state with a first power output and a first rotational speed,
- temporarily increasing the first power output during the first operating state beyond an output power that the wind power installation is able to generate based on prevailing wind conditions, and
- controlling, by a controller, a change to a second operating state with a second power output and a second rotational speed, controlling the change to the second operating state including:
- receiving, by a state observer, a rotational speed of the generator and a mechanical torque of the generator, the rotational speed and the mechanical torque being observed state variables,
- determining, by the state observer, an available aerodynamic power for feeding using the rotational speed of the generator and power fed into an intermediate electrical storage,
- determining a setpoint rotational speed using the available aerodynamic power,
- determining a setpoint power using the setpoint rotational speed, and
- using the setpoint power to adjust the generator.
A controller configured to determine an available aerodynamic power of a wind power installation including a generator, wherein the controller is configured to:
- control a change from a first operating state in which the generator feeds electrical power into an electrical supply network with a first operating state with a first power output and a first rotational speed, to a second operating state in which the generator feeds electrical power into the electrical supply network with a second power output and a second rotational speed, wherein the first power output during the first operating state is temporarily increased beyond an output power that the wind power installation is able to generate based on prevailing wind conditions, controlling the change to the second operating state including:
- observing a rotational speed of the generator and a mechanical torque of the generator as state variables
- determining an aerodynamic available aerodynamic power for feeding using the rotational speed of the generator and power fed into an intermediate electrical storage unit,
- determining a setpoint rotational speed using the available aerodynamic power,
- determining a setpoint power using the setpoint rotational speed, and
- using the setpoint power to adjust the generator.
A wind power installation comprising:
- a generator configured to feed electrical power into an electrical supply network, wherein the wind power installation is configured to operate in a first operating state with a first power output and a first rotational speed, and after the first operating state, the wind power installation is controlled to transition into a second operating state with a second power output and a second rotational speed, wherein the wind power installation is configured to temporarily increase the first power output during the first operating state beyond an output power that the wind power installation is able to generate based on prevailing wind conditions;
- and
- a controller configured to control the transition into the second operating state by:
- receiving a rotational speed of the generator and a mechanical torque of the generator, the rotational speed and the mechanical torque being observed state variables,
- determining an available aerodynamic power of the wind power installation based on the rotational speed of the generator and power fed into an intermediate electrical storage,
- determining a setpoint rotational speed using the available aerodynamic power,
- determining a setpoint power using the setpoint rotational speed, and
- using the setpoint power to adjust the generator.
Dependencies are inferred from the claim text.