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Hydraulic Soft Yaw System

Hydraulic Soft Yaw System. LOAD REDUCTION AND PROTOTYPE RESULTS S. Stubkier, H. C. Pedersen and K. Markussen. Agenda. Introduction System description Simulation setup Load reduction Results of controlled slippage Test rig presentation Measurement results Conclusion and Future prospects.

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Hydraulic Soft Yaw System

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  1. Hydraulic Soft Yaw System LOAD REDUCTION AND PROTOTYPE RESULTS S. Stubkier, H. C. Pedersen and K. Markussen

  2. Agenda • Introduction • System description • Simulation setup • Load reduction • Results of controlled slippage • Test rig presentation • Measurement results • Conclusion and Future prospects

  3. Main benefits of hydraulic yaw • Same load on all pinions at all times • Backlash has no influence on loading • Well defined extreme slippage • Fatigue load reduction • Ultimate load reduction • Lower tear and wear – increased yaw activity • Higher power to volume ratio

  4. System Description

  5. System Description Angle Pressure

  6. System Description Angle Pressure

  7. System Description Angle Pressure

  8. System Description Angle Pressure

  9. System Description Angle Pressure

  10. System Description Angle Pressure

  11. System Description Angle Pressure

  12. System Description Angle Pressure

  13. System Description Angle Pressure

  14. Simulation Setup Possibility of .dll or .mex file interface to your turbine code with full model of hydraulic yaw system.

  15. Load Reduction

  16. Controlled Slippage

  17. Controlled Slippage

  18. 8 hydraulic gear pumps/motors; 32 cc, T-max 164 Nm 8 electrical servo drives; Speed, torque and position control; 22.7 Nm 8 gears for electrical drives; r=1034 8 gears for hydraulic drives; r=323 4x12.5 liters High Performance Nitrogen Accumulators

  19. Control and Power Pack Temperatures and pressure measurements Special designed HWP Manifolds Torque and Speed transducers

  20. Measurements from Test Rig

  21. Influence on energy production • Little to noinfluence

  22. Features of hydraulic yaw system • Off grid operation • Self yaw by wind load • Energy harvesting from main shaft • Down wind stable turbine • Fault detection • Simple pressure measurements • Frequency analysis • Lower COE

  23. Conclusion • Advantages • Same load on all pinions at all times • Backlash has no influence on loading • Well defined extreme slippage • Fatigue load reduction • Ultimate load reduction • Lower tear and wear – increased yaw activity

  24. Conclusion Thankyou for your attention Søren Stubkier sst@hydratech-industries.com

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