Wind power is a sustainable power source that exploded a few decades ago. Permanent monitoring helps to avoid any unscheduled malfunction. In the worst case, a lack of maintenance could conduct to the turbine shut down or even destruction, cutting off the power production.
There are two types of applications:
• Turbine monitoring: measurements of vibrations on critical components
• Tower tilt inclination: angle calculation for proper tower positioning
Explanation of the System
A wind turbine has a simple mechanism: three blades rotate about an axis at low frequencies (typically from 0 to 20 rpm). After speed amplification, the shaft is connected to a generator that converts inertial to electrical energy. The sensors are embedded in a bi-axial or tri-axial container, fixed to a structure to measure its acceleration. A vibration is easily detected due to a different frequency.
The sensors will be exposed to a temperature is between -40 and 55°C, with atmospheric pressure. Humidity level can vary from 3% to 100%, whether the wind turbine is working under dry or humid conditions.
Good vibration analysis requires both a broad bandwidth and an excellent precision. The range of the bandwidth allows to notice low or high frequencies, and the precision describes how quickly defect is detected
Critical Technical Properties
• The VS1000 is adapted for vibration analysis: its usual range would be ±2g for blade and structural diagnosis, and around ±10g for internal monitoring. The vibration sensor family offers the best performance for monitoring, with bandwidth from DC 0 Hz to 7000 Hz at -3 dB, and a functioning temperature range from -55°C to +125°C.
• The TS9000 series is ideal for tilt applications: the TS9001.D largely respects the requirements for tower inclination, reaching a resolution of 0.003°.