Wind Turbine Feedforward Control Using Remote Sensing
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Solution Overview
Problem
Current wind turbine control systems face challenges in accurately measuring wind speed due to the inductive effect, leading to inaccurate detection of inflow wind information, which affects the control of large-scale wind turbines.
Innovation Solution
A feedforward control method and system that uses remote sensing measurement devices to obtain inflow wind information at multiple spatial points, synthesizes this information into a target wind speed, and predicts the arrival time of inflow wind at the impeller plane, allowing for active feedforward control of the wind turbine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If remote sensing measurement device is used to detect wind speed, then wind speed detection capability is improved, but measurement precision deteriorates due to inductive effect
Solution Approach 1:
The patent introduces an intermediary calculation process that uses wind speed data from multiple cross-sections to compute a target wind speed that represents the free incoming flow conditions upstream. This intermediary value eliminates the inductive effect by synthesizing measurements from multiple locations rather than relying on a single point measurement near the impeller.
Solution Approach 2:
The patent transitions from single-point measurement to multi-dimensional measurement by detecting wind speeds across multiple cross-sections at different distances from the wind turbine. This dimensional expansion allows the system to capture the spatial distribution of wind speed and calculate the upstream free flow conditions.
2Device complexity
If single point wind speed measurement is used, then device complexity is reduced, but measurement precision deteriorates due to inductive effect
Solution Approach 1:
The patent divides the measurement task into multiple segments by placing detection points across several cross-sections rather than using a single measurement location. Each cross-section provides segmented data that contributes to the overall calculation of target wind speed, distributing the measurement function across multiple spatial locations.
3Reliability
If feedforward control is implemented, then control precision is improved, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by calculating the incoming flow arrival time based on target wind speed and distance information before the wind actually reaches the impeller. This advance calculation allows the control system to prepare and execute control actions at the precise moment when inflow wind arrives, improving control precision through timing-based feedforward control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables accurate prediction of inflow wind arrival time and reduces the load on wind turbines by providing precise control, minimizing the impact of uncertain inflow winds and eliminating the inductive effect's influence on wind speed measurements.
Implementation Method 1
obtaining inflow wind information at multiple spatial point positions in front of the wind turbine through a remote sensing measurement device
Implementation Method 2
remote sensing measurement device configured to detect inflow wind information
Data Source
AI summary
A feedforward control method includes: acquiring, by means of a remote sensing measurement apparatus, inflowing wind information of a plurality of spatial point positions in front of a wind turbine, wherein the plurality of spatial points are distributed in a plurality of different cross sections, and the distances between the plurality of different cross sections and the wind turbine are different; combining the acquired inflowing wind information into a target wind velocity; predicting, on the basis of the combined target wind velocity, incoming flow arrival time required for inflowing wind at a target point to arrive at an impeller plane; and performing feedforward control on the wind turbine according to the predicted incoming flow arrival time.