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Main Issues on Wind Power Plants

Advanced Wind Turbine Controls Input Based on RealTime Loads Measured with Fiber Optical Sensors Embedded in Rotor Blades ewec 2006, Athens 28 February S. Kuhnt, J. Wernicke, R. Byars, J. Shadden (WindForce GmbH). Main Issues on Wind Power Plants. High Operational and Maintenance Costs

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Main Issues on Wind Power Plants

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  1. Advanced Wind Turbine Controls Input Based on RealTime Loads Measured with Fiber Optical Sensors Embedded in Rotor Blades ewec 2006, Athens 28 February S. Kuhnt, J. Wernicke, R. Byars, J. Shadden (WindForce GmbH)

  2. Main Issues on Wind Power Plants • High Operational and Maintenance Costs • Reliability below Customer Expectation • MTBF, MTTR • Competitiveness of COE • Low Insurability • Rapid Market Development

  3. FIBRADAPT™Advanced Wind Turbine Control System Operational Conditions of a wind turbine Goal • Reduction of Structural and Dynamic Loads (extreme and fatigue) • Increasing the Lifetime of Wind Turbine Components • Component Reliability Improvements (MTBF, MTTR) • Project Controlling and Management Parameter • Fast Return on Investment (ROI) Investments in Innovation ensure Future Business Opportunities

  4. Targets • Measuring of Rotor flapwise and edgewise Loads and Frequencies during Operation • Traceability of single Events (extreme Loads, emergency Stop etc.) • Traceability of fatigue Loads for residual Lifetime Estimation • Monitoring of Design Parameter • Monitoring of the Component Structure for early Detection of Damages and for determining predictive Maintenance

  5. Installed Measurement System

  6. Fibre Bragg Grating (FBG) -Benefits • Multiple sensors in a single Fibre • Simple Connectivity, low Sensor Mass • No EMI with other operational Systems • Higher Measurement Quality and Stability • Solid state Electronics • Lifetime Operation • High Reliability of Sensors No EMI, no Corrosion, high Reliability

  7. Control Interface Electronics

  8. FIBRADAPT: Advanced wind turbine controls

  9. Residual Lifetime Estimation Residual Lifetime Estimation is based on Load Cycle Counting during the Operation of the Wind Turbine used for predictive Maintenance.

  10. Structural Monitoring The Occurrence of Cracks and Defects can be detected at an early Stage to prevent catastrophic Failures and lengthy Downtimes. Data can be also used for Ice Load Monitoring.

  11. Active Control Real time Loads act as in Input for Individual Blade Pitch Control especially for large Wind Turbines where the Wind is very turbulent over the Rotor spam.

  12. Integration of FIBRADAPT

  13. FIBRADAPT™System Additional Applications • Integration into the SCADA System • Standard Application for Design Verifications • Development of a Wind Park Management System based on Load Data • Black Box Functionality

  14. Test Installation – Application of FIBRADAPT

  15. Sensor Layout in Test Blade 1

  16. Installation of FIBRADAPT during the Production of the Blade

  17. Bending Moment flapwise

  18. Flap- and edgewise Loads during Operation

  19. Frequency Analysis (Turbine Operation)

  20. Project planning - Outlook • Integration of FIBRADAPT into a Serie • Development and testing of active Control Algorithms for FIBRADAPT • Development of Methods for controlling and operating, based on Variables • Development of Methods for assuring the Application Process in Serial Production in Offshore Installations • Development of Software for Load Monitoring and Residual Lifetime Estimation

  21. Thank you for your attention! Die Entwicklung wird teilweise finanziert durch Mittel aus dem PFAU Programm der BIS Bremerhaven WindForce GmbH wird unterstützt durch Mittel des GRW Programms des Landes Bremen www.wind-force.com sabrina.kuhnt@wind-force.com

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