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EMVT 12 september - Henk Polinder - TU Delft
 

EMVT 12 september - Henk Polinder - TU Delft

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Direct Drive in Wave Energy Conversion - AWS Full Scale Prototype Case Study

Direct Drive in Wave Energy Conversion - AWS Full Scale Prototype Case Study
Miguel Prado, Henk Polinder

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    EMVT 12 september - Henk Polinder - TU Delft EMVT 12 september - Henk Polinder - TU Delft Presentation Transcript

    • 1Challenge the future Miguel Prado, Henk Polinder Direct Drive in Wave Energy Conversion - AWS Full Scale Prototype Case Study
    • 2Challenge the future Structure 1 Introduction 2 Wave Energy Overview 3 AWS Wave Energy Converter 4 PTO of AWS Pilot Plant 5 Conclusions
    • 3Challenge the future Wave Energy is not new ... Source: Christine Miller (www.outsidelands.org/wave-motor.php) and Power Magazine 1911 Holland Wave Motor California, USA, 1895 US Wave Motor Corporation New Jersey, USA, 1911
    • 4Challenge the future Different technologies being developed Pelamis, Scotland Wavestar, Denmark OPT, USA OWC Pico, Portugal Source: www.wavec.org; www.emec.org.uk
    • 5Challenge the future Wavedragon, Denmark OEbuoy, Ireland Wavebob, Ireland Aquamarine, Scotland Source: www.wavec.org; www.emec.org.uk And many more …
    • 6Challenge the future Only a few direct drive applications ... Source: www.wavec.org; www.emec.org.uk AWS 2MW, The Netherlands Oregon Univ. 10kW, USAUppsala Univ. 10kW, Sweden
    • 7Challenge the future Structure 1 Introduction 2 Wave Energy Overview 2.1 Waves (Fundamentals & World Resource) 2.2 Wave Energy Conversion 3 AWS Wave Energy Converter 4 PTO of AWS Pilot Plant 5 Conclusions
    • 8Challenge the future Waves, a byproduct of solar energy ... Source: Hagerman, G., “Wave and Tidal Power: Projects and Prospects”, CEAG, 2005
    • 9Challenge the future  No net mass transport (particles follow elliptical orbits)  Skin effect (motion decays exponentially from surface)  Energy storage (kinetic & gravitational potential)  Dispersion in frequency (T=6-12s => Vg=5-10m/s)  Power transmission by pulses (2 x wave frequency) P Monochromatic Waves
    • 10Challenge the future time MAXPP 5.0 P P Monochromatic Waves
    • 11Challenge the future Real Seas (Polychromatic) P MAXPP 1.0 P time
    • 12Challenge the future Source: “Wave Energy Utilization in Europe – Current Status and Perspectives”, CRES , 2002 ; Kinsman, B., “Wind Waves”, Prentice Hall, New Jersey, 1965 World Offshore Wave Resource ~2 TW
    • 13Challenge the future ~ ~Wave (variable height and period) Electricity - Grid (constant voltage and frequency)WEC Wave Energy Conversion
    • 14Challenge the future Wave (variable height and period) Captor PTO (Power Take Off) 2 ... N1 Electricity - Grid (constant voltage and frequency) Wave Energy Conversion
    • 15Challenge the future Structure 1 Introduction 2 Wave Energy Overview 3 AWS Wave Energy Converter 3.1 Concept 3.2 Pilot Plant 4 PTO of AWS Pilot Plant 5 Conclusions
    • 16Challenge the future AWS Concept • Submerged Device (better survivability) • Variable Volume (higher performance) • Adjustable Natural Period (higher performance) • Direct Drive PTO (higher reliability & performance) • Water Brakes (additional safety)
    • 17Challenge the future • Captor diameter:9.5m • Captor stroke: 7m • Max. PTO Force: 1MN • Nominal speed: 2.2m/s • Deployment: easy & reversible • Test Location: North Portugal (44m) • Test Period: < 1 year 6 km ~ ~ Landstation 15kV Grid AWS Pilot Plant
    • 18Challenge the future Pilot Plant Construction (2000-2001)
    • 19Challenge the future Pilot Plant Final Submersion (2004)
    • 20Challenge the future Structure 1 Introduction 2 Wave Energy Overview 3 AWS Wave Energy Converter 4 PTO of AWS Pilot Plant 4.1 Design 4.2 Construction & Installation 4.3 Offshore Tests Results 5 Conclusions
    • 21Challenge the future Design Choices (Linear Generator) • Topology:  3-phase longitudinal flux PM machine  Magnets on the translator  Materials:  NdFeB magnets  Copper windings  Laminated iron (stator core), solid back iron (translator) • Geometry:  Flat, double-sided machine (balance of magnetic forces)  Translator > stator (higher overlap)  Slots/pole/phase: 1 • Cooling: water cooled • Power electronics: current source inverter
    • 22Challenge the future Design Options (Linear Generator) To p M id B o tto m T ra n s la to r S e g m e n t S ta to r S e g m e n t T ra n s la to r P o s itio n
    • 23Challenge the future Design Options (Converter) Grid 15kV, 50Hz AC/ACConverter Generator 0-6kV,0-21Hz 3kV/3kV/15kV 2x1330kVA AC/AC Converter RDC Generator 0-6kV, 0-21Hz
    • 24Challenge the future Construction (Translator)
    • 25Challenge the future Construction (Stator)
    • 26Challenge the future Installation (Stator)
    • 27Challenge the future Installation (Stator)
    • 28Challenge the future Installation (Translator)
    • 29Challenge the future Installation (Translator)
    • 30Challenge the future Installation (Land Station)
    • 31Challenge the future Offshore Test Results (Resistor Bank) ~ ~ 15kV Grid
    • 32Challenge the future Offshore Test Results (Grid Connected) 14:00 14:15 14:30 14:45 15:00 15:15 0 50 100 150 200 250 P DC (kW) 14:00 14:15 14:30 14:45 15:00 15:15 0 20 40 60 80 100 120 R DC () ~ ~ 15kV Grid
    • 33Challenge the future Structure 1 Introduction 2 Wave Energy Overview 3 AWS Wave Energy Converter 4 PTO of AWS Pilot Plant 5 Conclusions
    • 34Challenge the future Conclusions / Lessons learnt • AWS designed, built and tested • Test results demonstrate the operating principle • Only test results at low power levels • Difficulties of submersion operation underestimated • The principle of AWS is very simple, but all kinds of secondary systems compromise reliability • Economic viability is not easy
    • 35Challenge the future Thank you very much !