Wind Turbine Blade Signal Processing via Fore-Ape Transformation
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Solution Overview
Problem
Horizontal-axis wind power generator turbines with three blades face inefficiencies in monitoring blade states due to the need to process three distinct signals, which complicates real-time management and maintenance, especially considering contamination and high replacement costs.
Innovation Solution
A signal processing device that transforms the three blade signals into two orthogonal fore-ape signals, allowing for efficient determination of blade states by removing rotation components and detecting abnormal operations through optical fiber sensors and proportional integral control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If three blade signals are processed separately to monitor each blade state, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines three separate blade signal processing channels into a single integrated processing system. The signal processing unit receives signals from all three blades and processes them together using coordinate transformation, reducing the number of independent processing paths from three to one while maintaining comprehensive monitoring capability through mathematical transformation of the combined signals.
Solution Approach 2:
The signal processing unit is designed with multi-functionality to handle multiple blade signals simultaneously. It performs coordinate transformation, rotation component removal, and state determination for all three blades within a single processing framework, making the system universal rather than requiring separate dedicated processors for each blade.
2Reliability
If three separate blade signals are processed in real-time, then reliability of blade monitoring is improved, but loss of time in signal processing increases
Solution Approach 1:
The system performs preliminary coordinate transformation on the three blade signals to convert them into a unified coordinate system before state determination. This preliminary processing step organizes the data structure in advance, enabling faster real-time analysis by eliminating the need for complex separate processing of each blade signal during critical monitoring periods.
3Measurement precision
If optical fiber sensors are installed on each blade to measure wind load moments, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The optical fiber sensor system is designed with multi-functionality to measure wind load moments on all three blades using a unified sensing approach. The sensors and processing system handle multiple measurement tasks simultaneously, making the system universal rather than requiring separate dedicated sensing systems for each blade, thereby reducing overall complexity while maintaining precision.
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 simplifies signal analysis, improving the efficiency of blade state determination and enabling effective management and maintenance by processing two simpler signals instead of three, thus reducing operational complexities and costs.
Implementation Method 1
an optical fiber sensor unit measuring wind load moments exerted on first to third blades and outputting first to third blade signals corresponding to the measured wind load moments
Data Source
AI summary
The present invention relates to a signal processing device for monitoring states of wind-power turbine blades and a method thereof, the signal processing device comprising: an optical fiber sensor unit for sensing moment of rotation of three blades so as to output the moment of rotation as blade signals; a signal transformation unit for converting three blade signals into two fore-ape signals; a rotation information input unit for sensing rotation information of the blades; a rotation speed estimation unit for estimating a rotation speed of the blades on the basis of the rotation information; a state determination unit which removes rotation components from the fore-ape signals and determines whether an operation of a blade is abnormal; and an output unit for outputting the determination result. According to the present invention, two fore-ape signals which are simpler than three blade signals can be processed such that an efficient signal analysis is enabled and the efficiency of determining a state of blades is improved, thereby efficiently managing and maintaining the blades.