Wind Turbine Rotor Load Control System for Error Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wind turbines face challenges in detecting installation errors, such as rotor position sensor misalignment and incorrect rotor blade wiring, due to symmetry issues, which can lead to increased mechanical loads and require expensive test equipment for aerodynamic performance measurement.
Innovation Solution
A load control system that induces aerodynamic imbalances to the rotor, measures resulting displacements, and uses these measurements to detect errors and calculate calibration factors for pitch angles, allowing for error detection and calibration without expensive equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant sensors are installed to detect rotor position errors, then measurement reliability is improved, but device complexity and cost increase
Solution Approach 1:
The system uses the wind turbine's own operational data and existing sensors to detect errors. The validation system analyzes rotor position measurements combined with aerodynamic performance data and load measurements that are already available during normal operation, eliminating the need for additional redundant sensors while maintaining detection capability
Solution Approach 2:
The system introduces an intermediate validation step that cross-checks rotor position sensor readings against independent measurements of aerodynamic performance and mechanical loads. This intermediary validation mechanism detects inconsistencies without requiring direct redundant sensing of rotor position
2Measurement precision
If expensive test equipment is used to measure aerodynamic performance changes, then measurement precision is improved, but cost increases
Solution Approach 1:
The system replaces expensive mechanical test equipment with a validation approach that uses the wind turbine's own operational parameters. By analyzing the relationship between pitch angles, rotor loads, and power output during normal operation, the system achieves aerodynamic performance validation without external test equipment
Solution Approach 2:
The wind turbine validates its own aerodynamic performance using data already collected during routine operation. The system monitors the correlation between commanded pitch angles and actual rotor response, detecting deviations that indicate leading edge wear or performance degradation without external intervention
3Force
If asymmetric load control is implemented to balance rotor loading, then mechanical load reduction is achieved, but system complexity increases
Solution Approach 1:
The system implements dynamic pitch angle adjustment where the pitch of individual rotor blades is continuously modified based on real-time load measurements. The control system actively balances asymmetric loads by applying differential pitch corrections to each blade, adapting to changing operational conditions rather than using fixed asymmetric configurations
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
The system effectively detects and corrects rotor position measurement and rotor blade installation errors, balances loading, and calibrates components, enhancing operational efficiency and reducing costs by eliminating the need for expensive test equipment.
Implementation Method 1
The load control system induces aerodynamic imbalances to a rotor and measures the resulting displacements or bending moments induced to the rotor
Implementation Method 2
measures the resulting displacements or bending moments induced to the rotor
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A wind turbine (100) includes a rotor (108), at least two rotor blades (112) coupled to the rotor, and a load control system (300) configured to adjust a pitch angle of at least one rotor blade of the two rotor blades. The load control system is further configured to intentionally induce a loading imbalance to the rotor, measure the loading imbalance induced to the rotor, transmit a signal representative of the measured loading imbalance to a calibration module (308), and at least one of detect an error and calibrate at least one component of the wind turbine based on the signal.