Wind Turbine Feedforward Control for Rapid Wind Speed Response
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Solution Overview
Problem
Wind turbines face challenges in rapidly changing wind speeds, leading to over-speed faults and increased loads due to hysteresis in existing control systems, which affect safe operation and long-term fatigue.
Innovation Solution
A feedforward control method and device for wind turbines that utilize real-time operation data and prediction models to anticipate and adjust to wind speed changes, enabling proactive control through pitch or electromagnetic torque adjustments, thereby reducing the risk of over-speed faults and load increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional feedback control is used, then the control system is simple to implement, but the wind turbine cannot respond quickly enough to rapid wind speed changes, causing over-speed faults and increased loads
Solution Approach 1:
The patent implements feedforward control by predicting future wind speed changes and generating control commands in advance. The prediction model forecasts wind speed based on historical data and current conditions, allowing the control system to prepare appropriate pitch or torque commands before the actual wind changes occur, thereby reducing response delay and preventing over-speed faults
Solution Approach 2:
The patent combines feedforward prediction with feedback mechanisms. The control system continuously monitors actual wind speed, generator speed, and power output, comparing these with predicted values. This closed-loop feedback ensures that prediction errors are corrected and maintains system stability while benefiting from the proactive nature of feedforward control
2Reliability
If feedforward control with prediction model is implemented, then the wind turbine can anticipate wind changes and control in advance, but the system complexity increases
Solution Approach 1:
The prediction model performs preliminary analysis of wind speed trends using historical operation data and current environmental conditions. By forecasting future wind states, the system can proactively adjust pitch angles or electromagnetic torque before adverse conditions occur, enhancing reliability by preventing over-speed faults and reducing mechanical loads on turbine components
Solution Approach 2:
The patent introduces a prediction model as an intermediary between wind speed measurement and control actuation. This intermediary component processes raw wind data and operational parameters to generate predicted future states, which then inform control decisions. The intermediary layer adds predictive capability without requiring direct modification of the fundamental control actuators
3Loss of time
If control commands are generated quickly, then the control response is fast, but the actuator may not complete the operation before wind speed changes again due to hysteresis
Solution Approach 1:
The feedforward control system generates control commands based on predicted future wind conditions rather than current states. By calculating appropriate pitch or torque adjustments in advance of the anticipated wind changes, the system compensates for the actuator's response time and hysteresis effects, ensuring that control actions are already in progress or complete by the time the wind condition actually changes
Data Source
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AI summary
A feedforward control method for a wind turbine set in a wind farm, comprising: obtaining real-time operation data of a predetermined wind turbine set in a wind farm; inputting the acquired real-time operation data into a predetermined prediction model corresponding to the predetermined wind turbine set so as to acquire prediction data by means of the predetermined prediction model; according to the acquired prediction data, determining whether to start a feedforward control function for the predetermined wind turbine set so as to control the operation state of the predetermined wind turbine set on the basis of a predetermined manner of feedforward control. The method may control a wind turbine set in advance and is beneficial in the safe operation of wind turbine sets. The present invention also relates to a feedforward control device for a wind turbine set in a wind farm, a control system, a computer readable storage medium and a field group controller.