Wind Farm Data Storage Using Threshold-Based Value Filtering
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Solution Overview
Problem
Conventional storage systems for wind turbine data face significant memory challenges in storing measured values over long periods due to the large volume of data required, making it difficult to access past data for meaningful evaluation of wind turbine operation.
Innovation Solution
A method for storing wind turbine data involves recording sequential measured values and comparing changes with adjustable thresholds, discarding values below the threshold, and optimizing memory usage by varying time intervals and thresholds based on the measured variable's characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all measured values are stored in predefined intervals, then data completeness is improved, but memory requirements increase significantly
Solution Approach 1:
The patent changes the parameter of data storage by introducing a threshold-based filtering mechanism. Instead of storing all measured values uniformly, the system compares each measured value against a threshold and only stores values that exceed this threshold. This parameter change transforms the storage approach from comprehensive to selective, significantly reducing memory requirements while preserving important data points for long-term operation monitoring.
2Measurement precision
If measured values are stored with high frequency, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by making the storage frequency variable rather than uniform. Different measured values are stored at different frequencies based on their significance relative to the threshold. Values exceeding the threshold are stored with high precision and frequency, while values below the threshold are discarded. This local differentiation optimizes measurement precision for critical data while simplifying the overall storage system.
Data Source
AI summary
A method for storing measured values of a wind turbine or a wind farm comprises recording several chronologically sequential measured values of a measured variable. The method also comprises acquiring a change between a previous measured value of the recorded measured values and the chronologically subsequent measured value of the recorded measured values and comparing the change with an adjustable or predefined threshold value. The method further comprises storing the subsequent measured value in a case where the change lies above the predefined threshold value, or discarding the subsequent measured value in a case where the change lies below the predefined threshold value. Embodiments further relate to a wind farm controller and to a wind farm with a wind farm controller.