Determining tower to tip clearance for a wind turbine
AssigneeSiemens Gamesa Renewable Energy A/S
InventorsJohannes Gerhardes Alberts, Bjarne Skovmose Kallesøe
Life of this patent
Estimating the term…
Abstract
A method of determining a distance between a rotor blade tip and a tower of a wind turbine includes: estimating the distance based on a strain measurement; measuring the distance; correcting an estimation procedure based on the estimated distance and the measured distance; and deriving a corrected distance based on the corrected estimation procedure.
Claims13
A method of determining a distance between a rotor blade tip and a tower of a wind turbine, the method comprising:
- estimating the distance based on a strain measurement;
- measuring the distance;
- correcting an estimation procedure based on the estimated distance and the measured distance;
- deriving a corrected distance based on the corrected estimation procedure;
- and
- changing a blade pitch angle to reduce lift when the corrected distance is not in an allowed range,
- wherein correcting the estimation procedure comprises:
- forming a ratio of the estimated distance and the measured distance;
- and
- calculating at least one correction parameter based on the ratio.
A method of controlling a wind turbine, the method comprising:
- estimating a distance between a rotor blade tip and a tower of the wind turbine based on a strain measurement;
- measuring the distance;
- correcting an estimation procedure based on the estimated distance and the measured distance, wherein correcting the estimation procedure includes forming a ratio of the estimated distance and the measured distance, and calculating at least one correction parameter based on the ratio of the estimated distance and the measured distance;
- deriving a corrected distance based on the corrected estimation procedure;
- assessing whether the corrected distance is in an allowed range;
- and
- controlling the wind turbine based on the assessment, including changing a blade pitch angle to reduce lift when the determined distance is not in the allowed range.
An arrangement for determining a distance between a rotor blade tip and a tower of a wind turbine, the arrangement comprising:
- a processor configured:
- to estimate the distance based on a strain measurement;
- to receive a measured distance;
- to correct an estimation procedure based on the estimated distance and the measured distance;
- to derive a corrected distance based on the corrected estimation procedure;
- and
- to change the blade pitch angle to reduce lift when the corrected distance is not in an allowed range,
- wherein correcting the estimation procedure comprises:
- forming a ratio of the estimated distance and the measured distance;
- calculating at least one correction parameter based on the ratio of the estimated distance and the measured distance.
Dependencies are inferred from the claim text.