Wind Turbine Power Evaluation Using Reference Group Correlation
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Solution Overview
Problem
In wind farms, it is challenging to accurately evaluate the power generation output of wind turbines on the downwind side due to the influence of wake from front turbines, and existing methods struggle to differentiate between changes in power generation caused by output control parameter adjustments and changes in wind conditions.
Innovation Solution
A wind turbine group power generation amount evaluation device that acquires wind direction and establishes a correlation between target and reference wind turbine groups, allowing for the estimation and evaluation of power generation changes by adjusting output control parameters, particularly for turbines on the upwind side, to optimize overall power generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If power generation amounts are compared before and after changing output control parameters, then optimization of power generation can be evaluated, but wind condition changes make accurate evaluation impossible
Solution Approach 1:
The patent introduces a reference wind turbine group as an intermediary element to mediate the evaluation process. By comparing the target wind turbine group's power generation against the reference group's power generation under the same wind conditions, the system isolates the effect of output control parameter changes from wind condition variations. The reference group serves as a control variable that captures environmental changes, enabling accurate attribution of power generation changes to parameter adjustments rather than wind variability.
2Measurement precision
If wind vane anemometer is used to measure wind speed for power generation evaluation, then wind condition data is obtained, but measurement accuracy is insufficient for appropriate evaluation
Solution Approach 1:
The patent creates a virtual copy of the wind measurement system by using the reference wind turbine group's power generation output as a proxy for wind conditions. Instead of relying on potentially inaccurate physical anemometers, the system copies the wind information through the reference turbines' actual power generation response to the same wind field, providing more reliable indirect measurement of wind conditions for evaluation purposes.
3Productivity
If output control parameter is changed to optimize power generation, then power generation amount changes, but it is impossible to differentiate between parameter effect and wind condition effect
Solution Approach 1:
The patent segments the power generation system into a target wind turbine group (where output control parameters are changed) and a reference wind turbine group (where parameters remain constant). This segmentation allows independent analysis of parameter effects in the target group while using the reference group to capture pure wind condition effects. By comparing the two segmented systems, the patent isolates and identifies the specific contribution of output control parameter changes to power generation optimization.
Data Source
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AI summary
A wind turbine group power generation amount evaluation device includes a criterial correlation acquisition unit which acquires a criterial correlation between a target power generation amount by a target wind turbine group and a reference power generation amount by a reference wind turbine group, the target wind turbine group having, as members, n wind turbines disposed along the acquired wind direction, the reference wind turbine group having, as members, the wind turbines which are not the members of the target wind turbine group and are disposed along the wind direction, a set value changing unit configured to change a set value of an output control parameter of at least one of the wind turbines in the target wind turbine group, a power generation amount acquisition unit configured to acquire the target power generation amount and the reference power generation amount measured after a change in the set value, a target power generation amount estimation unit configured to calculate, based on the criterial correlation and the reference power generation amount acquired after the change, an estimated value before the change of the target power generation amount which corresponds to the reference power generation amount acquired after the change, and an evaluation unit configured to evaluate a target power generation amount after the change based on a comparison between the target power generation amount after the change and the estimated value before the change.