Wind Turbine Blade Torsion Detection for Vibration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Torsional vibrations of rotor blades in wind turbines can lead to structural damage and undesired loads on other components, posing a risk to the integrity of the wind turbine.
Innovation Solution
A method for operating a wind turbine that detects torsional movements exceeding a threshold and generates output signals to adjust the wind turbine's operation, using sensor systems to measure pitch angles, bending moments, and angular accelerations to reduce torsional vibrations through changes in pitch angle, rotational speed, and power output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotor blade length is increased to capture more wind energy, then the energy capture capability is improved, but the risk of structural damage from torsional vibrations increases
Solution Approach 1:
The system performs preliminary detection of torsional vibrations using sensors before structural damage occurs. When vibrations exceed a threshold, the control system preemptively adjusts pitch angles or shuts down the turbine, preventing damage before it happens rather than reacting after damage occurs.
Solution Approach 2:
The system continuously monitors torsional vibrations through sensors and uses this feedback to dynamically adjust operational parameters. The control system receives real-time data on vibration amplitude and automatically modifies pitch angles or power output to maintain vibrations within safe limits, creating a closed-loop control system.
2Reliability
If torsional vibrations are monitored continuously to prevent structural damage, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The monitoring system uses existing multi-functional components already present in wind turbines. Pitch sensors serve dual purposes: controlling pitch angles for power optimization and detecting torsional vibrations. The control system integrates vibration monitoring with existing power regulation functions, avoiding the need for entirely separate dedicated monitoring infrastructure.
Solution Approach 2:
The system uses the turbine's own operational parameters and existing sensors to monitor its own structural health. The control system analyzes data from existing pitch sensors and power measurements to detect torsional vibrations, allowing the turbine to self-diagnose without requiring external monitoring equipment or complex additional sensor arrays.
3Reliability
If the pitch angle is changed to reduce torsional vibrations, then the structural damage risk is reduced, but the power output may be affected
Solution Approach 1:
The system dynamically adjusts pitch angles based on real-time vibration conditions rather than using fixed pitch settings. When torsional vibrations exceed thresholds, the control system temporarily modifies pitch angles to reduce vibrations, then restores optimal pitch angles once vibrations subside, allowing the turbine to adapt operational parameters dynamically based on structural conditions.
Solution Approach 2:
The system implements periodic monitoring and adjustment cycles. Vibration thresholds are continuously monitored, and pitch angle adjustments are made periodically or immediately when thresholds are exceeded. This periodic control allows the system to balance structural protection with power generation by making temporary, condition-based adjustments rather than continuous modifications.
Data Source
AI summary
According to an embodiment, the method is for operating a wind turbine having a rotor with at least one rotor blade and a setting system which is configured to change the operation of the wind turbine. The method includes a step in which first trigger information is provided, wherein the first trigger information is representative of whether the torsional movement of at least one rotor blade exceeds a threshold. If this is the case, a first output signal is generated which is configured to cause the setting system to change the operation of the wind turbine in order to reduce the torsional movement of the at least one rotor blade.