Control of a wind turbine based on operational trajectory validation
First Claim
1. A control system for a wind turbine, comprising:
- a main controller arranged for calculating one or more predicted operational trajectories and a plurality of predicted safe-mode control trajectories, the one or more predicted operational trajectories include a predicted control trajectory where a trajectory comprises a time series of at least one variable and the plurality of predicted safe-mode control trajectories comprises at least one reduced operational mode trajectory and at least one shut-down mode trajectory; and
a safety controller arranged for;
receiving the one or more predicted operational trajectories,evaluating, during operation of the wind turbine and in accordance with at least one validation routine, the one or more predicted operational trajectories to determine whether or not the predicted control trajectory is valid or invalid for a future time slot,evaluating, during the operation of the wind turbine and in accordance with the at least one validation routine, the predicted safe-mode control trajectories to determine whether or not the at least one reduced operational mode trajectory and at least one shut-down mode trajectory are valid or invalid for the future time slot,wherein the at least one validation routine is configured to select a selected predicted safe-mode control trajectory from the at least one reduced operational mode trajectory and the at least one shut-down mode trajectory, andwherein the control system controls the wind turbine with the predicted control trajectory if the predicted control trajectory is valid, and controls the wind turbine with the selected predicted safe-mode control trajectory if the predicted control trajectory is invalid.
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Accused Products
Abstract
The present invention relates to control of wind turbines based on predicted operational trajectories. A control system for a wind turbine is described where a main controller calculating one or more predicted operational trajectories and a safety controller validates at least one of the one or more predicted operational trajectories. The control system controls the wind turbine with the predicted control trajectory if the validation is valid, and controls the wind turbine with a safe-mode control trajectory if the validation is invalid. In an embodiment, the main controller is implemented as a receding horizon controller, e.g. in the form of a model predictive controller (MPC).
8 Citations
19 Claims
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1. A control system for a wind turbine, comprising:
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a main controller arranged for calculating one or more predicted operational trajectories and a plurality of predicted safe-mode control trajectories, the one or more predicted operational trajectories include a predicted control trajectory where a trajectory comprises a time series of at least one variable and the plurality of predicted safe-mode control trajectories comprises at least one reduced operational mode trajectory and at least one shut-down mode trajectory; and a safety controller arranged for; receiving the one or more predicted operational trajectories, evaluating, during operation of the wind turbine and in accordance with at least one validation routine, the one or more predicted operational trajectories to determine whether or not the predicted control trajectory is valid or invalid for a future time slot, evaluating, during the operation of the wind turbine and in accordance with the at least one validation routine, the predicted safe-mode control trajectories to determine whether or not the at least one reduced operational mode trajectory and at least one shut-down mode trajectory are valid or invalid for the future time slot, wherein the at least one validation routine is configured to select a selected predicted safe-mode control trajectory from the at least one reduced operational mode trajectory and the at least one shut-down mode trajectory, and wherein the control system controls the wind turbine with the predicted control trajectory if the predicted control trajectory is valid, and controls the wind turbine with the selected predicted safe-mode control trajectory if the predicted control trajectory is invalid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A wind turbine park controller arranged for controlling one or more wind turbines of a wind turbine park, the wind turbine park controller comprising:
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a main controller arranged for calculating one or more predicted operational trajectories and a plurality of predicted safe-mode control trajectories, the one or more predicted operational trajectories include a predicted control trajectory where a trajectory comprises a time series of at least one variable and the plurality of predicted safe-mode control trajectories comprises at least one reduced operational mode trajectory and at least one shut-down mode trajectory; and a safety controller arranged for; receiving the one or more predicted operational trajectories, evaluating, during operation of a wind turbine and in accordance with at least one validation routine, the one or more predicted operational trajectories to determine whether or not the predicted control trajectory is valid or invalid for a future time slot, evaluating, during the operation of the wind turbine and in accordance with the at least one validation routine, the predicted safe-mode control trajectories to determine whether or not the at least one reduced operational mode trajectory and at least one shut-down mode trajectory are valid or invalid for the future time slot, wherein the at least one validation routine is configured to select a selected predicted safe-mode control trajectory from the at least one reduced operational mode trajectory and the at least one shut-down mode trajectory, and wherein the wind turbine park controller controls the wind turbine with the predicted control trajectory if the predicted control trajectory is valid, and controls the wind turbine with the selected predicted safe-mode control trajectory if the predicted control trajectory is invalid.
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19. Method of operating a wind turbine, the method comprising:
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calculating in a normal operational domain one or more predicted operational trajectories and a plurality of predicted safe-mode control trajectories, the one or more predicted operational trajectories comprise a predicted control trajectory, a trajectory comprises a time series of at least one variable and the plurality of predicted safe-mode control trajectories comprise at least one reduced operational mode trajectory and at least one shut-down mode trajectory; and receiving in a safety related domain the one or more predicted operational trajectories; evaluating, during operation of the wind turbine and in accordance with at least one validation routine, the one or more predicted operational trajectories to determine whether or not the predicted control trajectory is valid or invalid for a future time slot, evaluating, during the operation of the wind turbine and in accordance with the at least one validation routine, the predicted safe-mode control trajectories to determine whether or not the at least one reduced operational mode trajectory and at least one shut-down mode trajectory are valid or invalid for the future time slot, wherein the at least one validation routine is configured to select a selected predicted safe-mode control trajectory from the at least one reduced operational mode trajectory and the at least one shut-down mode trajectory; and controlling the wind turbine with the predicted control trajectory if the predicted control trajectory is valid, and controlling the wind turbine with the selected predicted safe-mode control trajectory if the predicted control trajectory is invalid.
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Specification