Rotor Blade Ice Detection System Testing via Virtual Signal Injection
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Solution Overview
Problem
Existing rotor blade ice detection systems for wind turbines are difficult to test effectively, requiring complex simulations and interruptions in operation to ensure proper functioning, especially during ongoing operation.
Innovation Solution
A method and system that modify operating and environmental parameters to simulate icing conditions, allowing the rotor blade ice detection system to output warnings without altering actual conditions, enabling easy testing during regular operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical icing simulation is performed by fastening weights to the rotor blade, then the ice detection system can be tested, but the testing becomes very complicated and requires interruption of wind turbine operation
Solution Approach 1:
The patent creates a virtual copy of the physical icing condition by generating simulated sensor signals that mimic the electrical characteristics of actual ice detection sensors. Instead of physically attaching weights to simulate ice mass, the system generates test signals that replicate the electrical response of sensors detecting icing conditions, thereby simplifying the testing process while maintaining reliability
Solution Approach 2:
The patent replaces the mechanical testing approach (physically fastening weights to rotor blades) with an electrical/signaling approach. The test signal generator produces electrical signals that simulate sensor outputs, substituting mechanical ice simulation with electrical signal simulation, which eliminates the need for physical modifications to the rotor blade and allows testing during operation
2Reliability
If physical icing simulation is performed by fastening weights to the rotor blade, then the ice detection system can be tested, but the wind turbine operation must be interrupted
Solution Approach 1:
The system uses virtual signal copying to simulate icing conditions without physical intervention. By generating test signals that replicate sensor responses to ice detection, the system enables testing while the wind turbine continues normal operation, maintaining productivity while ensuring detection system reliability
Solution Approach 2:
The patent replaces mechanical ice simulation (which requires shutdown) with electrical signal simulation that can be injected into the detection system during operation. This substitution allows continuous wind turbine operation while performing comprehensive ice detection system tests
3Measurement precision
If complex mathematical evaluations are used to detect icing based on dynamic behavior, then detection accuracy can be improved, but the system becomes more difficult to test
Solution Approach 1:
The patent creates simplified test signal copies that directly simulate sensor outputs under icing conditions, bypassing the need for complex mathematical evaluation testing. The test signals replicate the electrical characteristics of actual ice detection, providing a straightforward method to verify detection accuracy without complicating the test setup
Solution Approach 2:
Instead of testing the complex mathematical evaluation system by creating complex test scenarios, the patent inverts the approach by directly injecting simulated sensor signals at the input stage. This allows verification of detection accuracy through simple signal injection rather than complex scenario recreation
Data Source
AI summary
Method for testing a rotor blade ice detection system for a wind turbine, the rotor blade ice detection system being configured to output a warning in the event of icing of a rotor blade being monitored, the method having the following steps of: acquiring data relating to a rotor blade to be monitored, providing at least one value of an operating and/or environmental parameter, modifying the at least one value provided in such a manner that the at least one modified value differs from an actual value of the parameter, evaluating the data relating to the rotor blade to be monitored and the at least one modified value via the rotor blade ice detection system, and testing whether the rotor blade ice detection system outputs a warning.