Wind Farm Output Control Device for Target Matching
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Solution Overview
Problem
Existing wind farm output control methods fail to accurately match the actual output of a wind farm to a target value due to changes in wind speed, leading to potential over or underproduction across turbines, which can result in the entire farm falling short of its output target.
Innovation Solution
An output control device and method that calculates each wind turbine's potential output based on its current output and wind energy extractability, assigning output increase amounts to turbines with greater potential to mitigate the effects of wind speed changes, ensuring the wind farm's total output aligns with the target value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If output change amount is assigned to each wind turbine based on current output, then the wind farm can achieve the desired output target value, but when wind speed changes after assignment, the actual output cannot be obtained as planned
Solution Approach 1:
The control device performs preliminary actions by continuously monitoring wind speed trends and proactively adjusting output commands before wind speed changes significantly impact turbine output. This anticipatory control allows the wind farm to adapt to upcoming wind conditions, ensuring more reliable achievement of output target values despite natural wind variability.
Solution Approach 2:
The system implements feedback mechanisms by continuously measuring actual wind speeds at each turbine, comparing predicted output with actual output, and adjusting output commands accordingly. This closed-loop control enables real-time correction of output deviations caused by wind speed changes, improving both output matching accuracy and prediction reliability.
2Ease of operation
If output is restricted by assigned change amount for turbines with increased wind speed, then individual turbine control is maintained, but the wind farm cannot fully utilize potential output increase
Solution Approach 1:
The control system dynamically adjusts output commands based on real-time wind speed conditions and turbine-specific characteristics. When wind speeds increase, the system automatically recalculates and increases output commands for affected turbines, allowing the wind farm to fully capture available wind energy while maintaining individual turbine control through customized output adjustments.
Solution Approach 2:
The system changes operational parameters by adjusting output commands in response to wind speed variations. When wind speed increases beyond initial assignment conditions, the control device modifies the output parameter for each turbine based on its current wind resource availability, enabling the wind farm to maximize productivity while maintaining flexible individual turbine management.
3Reliability
If deload operation is performed to secure electrical output during grid disturbance, then output stability is improved, but normal power generation efficiency is reduced
Solution Approach 1:
The control device applies preliminary anti-action by maintaining wind turbines in a deloaded state during normal operation, keeping them below maximum capacity to preserve headroom for rapid output increases during grid disturbances. This proactive positioning allows immediate response to grid events without sacrificing long-term reliability, as the system quickly recovers to optimal efficiency once stability is restored.
Data Source
AI summary
An output control device for a wind farm which includes n number of wind turbines includes a WTG output obtaining unit for obtaining a current output Pi of each of the wind turbines; an extractable output calculation unit for calculating an extractable output Pmaxi for each of the wind turbines; a potential output calculation unit for calculating a potential output Ppoti of each of the wind turbines based on a difference between the extractable output Pmaxi and the current output Pi of each of the wind turbines; and a WTG output determination unit for determining an output command value of each of the wind turbines so that a total output PWF of the wind farm becomes closer to an output target value PWF*. The WTG output determination unit assigns an output increase amount to each of the wind turbines and to determine the output command value.