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ICCI 2010 „Technical Problems in Wind Measurement Campaign“

ICCI 2010 „Technical Problems in Wind Measurement Campaign“. Presentation Outline Added value of high quality wind measurement Met mast installation & problems Data transfer & quality Met mast maintenance and problems Effect of wind speed uncertainity on IRR.

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ICCI 2010 „Technical Problems in Wind Measurement Campaign“

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  1. ICCI 2010 „Technical Problems in Wind Measurement Campaign“

  2. Presentation Outline • Added value of high quality wind measurement • Met mast installation & problems • Data transfer & quality • Met mast maintenance and problems • Effect of wind speed uncertainity on IRR

  3. What is the added value of high quality wind measurement campaign? • everything depend on meteorological data • wind farm design parameter • energy yield • uncertainities • cost effectiveness • micrositing „Banks wants to have high quality measurement on international standards to reduce the uncertainities and to make projects financiable“

  4. Assessment of uncertainities in energy production !!! Quantifying the uncertainities

  5. What does high quality stand for? • measurement at a representative location depending on terrain type • flat terrain representativeness radius up to 10 km • complex terrain representativeness radius only near to 2 km • measurement at hub height • standard guideline: min measurement height should be 2/3 hub height • measurement with 2 anemometers above boundary level • vertical increase differs from Ekman-layer and Prandtl-layer • Prandtl-layer varries according to thermal strafication of the air 20-100m • mean height near 60m above ground – depends on terrain • measurement tools within the international standarts • IEC 61400-12-1: Wind turbines-part 12-1: Power performance measurements of electricity producing wind turbines, 2005 • IEC 61400-1: Wind turbine generator systems part 1: Safety requirements, 1998 • IEC 61400-1: Wind turbines- Part1: Design requirements 2005 • ISO/IEC Guide 98: 1995- Guide to the expression of uncertainty in the measurement • mast maintenance Ref: Dynamics of the athmosphere: Wilford Ydunkowski and Andreas Bott

  6. Met mast types Tubular Wind Met Mast Lattice Wind Met Mast Telescopic Wind Met Mast Other Measurement Methods (SODAR...)

  7. Met mast installation problems Static calculation of mast (with ice load over 1000m altitude) Accrediated mast with calibrated equipment (IEC 61400, MEASNET Cal. Cert.)

  8. Met mast installation problems Boom configuration and orientation of met mast Flat area (with 3m height difference from center to the anchorages) Available for transportation Soil condition Correct logger configuration and start-up Approval of installation

  9. Data transfer Eternet, GSM, GPRS, DSL connections • Web interface • Connection is maintained by GSM connection by using a telephone modem • Enter the IP adress of the data-logger in your browser • Use admin or guest log-in with a pre-defined password • Network interface • Connection is maintained by a PC via cross-patch cable (LAN standart eternet cable) • Internet integration • Connection maintained by GPRS connection by using a web interface. • GSM provider shall provide public APN (Access Point Name) • Hostname must be registered to http//www.dyndns.org • Automatic e-mail • Conneciton maintained by DSL, GPRS connection, the data-logger sends the daily data everyday per e-mail at 00:00

  10. Data quality Daily data shall be analysed and tested regularly 2-3 times in a week Break-down problems, sensor problems shall be figured out Visual check, completness check, range test, constant value test, correlation test, trends and inconsistencies tests, plausibility test „The aim is to figure out the problems fast to reduce bad availability“

  11. Regular Met Mast Maintenance Tensioning the steel cables Controlling the data logger connections Controlling the batteries Cleanig the solar panel Controlling the anemometers and wind wanes with naked eyes

  12. Met Mast Emergency Maintenance Problems Implausible data (something wrong...) Lightenning (especially in autumn, spring times) Icing of the equipment (anemometer and wind wane) Equipment break down (bec. of third parties or birds) Oxidation at connectors Equipment thief (especially batteries and solar panels are stolen) Short circuit problem (might be anywhere) Battery problems (voltage level is low) Connection problem (due to bad weather conditions)

  13. Reporting Every interaction of met mast or equipment shall be reported carefully New slope, offset values shall be integrated Calibration certificates shall be collected In order to react fast, a set of equipment shall be kept as storage

  14. Last but not least Wind Speed Calculation V=Vr x (H/Hr)^α Method 1 α= In(V1/V2) / In(H1/H2) Method 2 α= 1/7

  15. Thank You! EPURON Turkey Cumhuriyet Caddesi Engin Apt. No:238 Kat:7 Harbiye Istanbul Türkiye www.epuron.de info@epuron.de Fon: +90 212 296 70 16 Fax: +90 212 296 95 99

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