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Proposal for TC88/PT12-4: Power performance verification of electricity producing wind turbines based on Numerical Site

Proposal for TC88/PT12-4: Power performance verification of electricity producing wind turbines based on Numerical Site Calibration. Akihiro SUZUKI, Wind Energy Institute of Tokyo, Inc. Makoto IIDA, The University of Tokyo. Problem statement.

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Proposal for TC88/PT12-4: Power performance verification of electricity producing wind turbines based on Numerical Site

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  1. Proposal for TC88/PT12-4:Power performance verification of electricity producing wind turbines based on Numerical Site Calibration Akihiro SUZUKI, Wind Energy Institute of Tokyo, Inc. Makoto IIDA, The University of Tokyo

  2. Problem statement • The site calibration technique in IEC 61400-12-1 is NOT always applicable for power curve measurements. • The site may be in complex terrain without previous site calibration data. • Hub height wind measurement may be impractical at existing wind turbine site and/or very large wind turbines. • Numerically predicting the flow field, instead of executing field measurements for site calibration using sophisticated computer model (Computational Fluid Dynamics)

  3. Goal • Prepare a new document that describes the standardized technique for power curve measurements using computational fluid dynamics (CFD) models, called Numerical Site Calibration (NSC). • NSC is to be employed at the sites when the site calibration in IEC 61400-12-1 document is impractical. • The document should provide information on the uncertainty on numerically estimating the wind flow field for determining the power curve. • After 3 years of discussion within PT12-2, it proved difficult to achieve a consensus among experts to produce an International Standard (IS). • The convener for PT12-4 proposes to work towards a Technical Specification (TS), instead of an IS.

  4. Scope • The new document should describe the standardized techniques for flow field simulation procedure and field measurement methods tailored for numerical site calibration. • The new document should describe the validation procedure for flow field simulation (CFD) models. • The new document should provide information on the accuracy and uncertainty of the technique. • Working text in English

  5. Work Methods • Description of NSC Procedure • Flowcharts that clarify the standardized procedure • Document the procedure in the flowchart in details • More technical discussions in the PT • Validation of the Technique • To achieve consensus among team members • Clarify the technical issues that need to be defined and to be included in the new document • JP will supply a set of field test data (topographic data and field wind data). • More datafrom other members are appreciated

  6. Japanese Activity for Numerical Site Calibration Mast1 Flat Plane Mast2 Complex Terrain

  7. Project Team • The goal: Draft Technical Specification(DTS) in 20months, approximately by February2012. • The PT plans to meet 3 times per year, 6 times until the completion of a DTS. • Call for PT secretary

  8. Proposed –Time Schedule • June 2010 MTG1, location preferably somewhere in Europe • Presentations from experts • Recognition of Tasks and Issues • Setting up of subtaskteams • October 2010 MTG2 • Discussion on the result of investigation: Stage 1 • February 2011 MTG3 • Discussion on the result of investigation: Stage 2 • Complete the first working draft (WD) • May 2011MTG4 • Discussion on the first WD – Preparing a CD • October 2011MTG5 • Circulate the CD to TC88 • October 2011 TC88 • Report the progress. • February 2012 MTG6 • Drafting for a 2nd CD as a DTS • Circulate a DTS to TC88

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