Nacelle Anemometer Wind Speed Correction Algorithm
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Solution Overview
Problem
Nacelle-based wind speed measurements for wind turbines are inaccurate due to coupling with power production, leading to errors in wind speed assessment and suboptimal turbine operation, especially in complex terrain, and existing data acquisition systems fail to account for these errors.
Innovation Solution
A method and system for determining corrected wind speed data using a nacelle-based anemometer, which involves measuring wind speed, obtaining operational parameter values, and processing the data with a processing unit to account for dynamic and static factors using an algorithm, thereby correcting for errors introduced by power production and flow distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate meteorological mast is used to measure wind speed, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the wind speed measurement function from the separate meteorological mast and integrates it into the nacelle of the wind turbine. By placing the anemometer directly on the nacelle, the system eliminates the need for external measurement infrastructure while maintaining the capability to measure wind speed for operational control decisions.
Solution Approach 2:
The patent combines the wind speed measurement function with the existing nacelle structure of the wind turbine. The anemometer is mounted on the nacelle, merging the measurement system with the turbine's core components, thereby reducing overall system complexity and eliminating the need for separate measurement infrastructure.
2Device complexity
If nacelle-based anemometer is used to measure wind speed, then device complexity is reduced, but measurement precision deteriorates due to power production coupling
Solution Approach 1:
The patent segments the wind speed measurement process into distinct operational phases: uncorrected wind speed measurement during turbine operation, and free stream wind speed determination during idle periods. By separating these functions temporally, the system can use simple nacelle-based measurement while achieving accurate free stream wind speed data for control purposes.
Solution Approach 2:
The patent performs preliminary measurement of free stream wind speed when the turbine is idle or not producing power, before the turbine begins operation. This preliminary action captures the true ambient wind conditions without the distorting effects of turbine operation, and this data is then used to inform operational control decisions.
3Ease of operation
If existing data acquisition systems are used, then ease of operation is maintained, but measurement precision deteriorates due to unaccounted errors
Solution Approach 1:
The patent implements a feedback mechanism where free stream wind speed measurements taken during idle periods are used to correct and improve the accuracy of wind speed assessments during operational periods. The system continuously updates its understanding of ambient wind conditions based on periodic measurements, feeding this information back into the control system to enhance measurement precision without complicating operation.
Data Source
AI summary
A technique for correcting measurement error in data produced by a nacelle-based anemometer and for determining free stream wind speed for a wind turbine involves ascertaining parameters related to the wind turbine and the operation thereof, and using the parameters and data from the nacelle based anemometer as inputs to an algorithm to provide for determination of corrected wind speed data.