歐洲風(fēng)能技術(shù)論文68_hardware-in-the-loop_development_and_testing_of_new-全文預(yù)覽
【正文】 ample simulation for pitch load situation in turbulent wind conditions RealTime Simulation: Pitch System Model pitch gear ratio 1:1000 tooth clearance at fast side of pitch gears blade bearing friction DRE/CONformula for large bearings: MR = 181。) RealTime Simulation: Aerodynamic Model (3) EWEC 2022, Athens Martin Geyler 14 2D turbulent Wind Field is simulated offline and read from a file during real time simulation ? reproducible time series 8 x 8 points in the rotor plane, linear interpolation only mean wind direction RealTime Simulation: Turbulent Wind Field Input (1) Method by Mann wind field is assembled in a 3Dbox by means of inverse FFT Fourier Coefficients calculated from spectraltensor ( only ?11 used ) ?frozen turbulence“ : dimension L1 is used as time axis Parameter fitting to Kaimal spectrum Input parameters: mean wind speed, mean wind shear, turbulence intensity Extreme gust events can be embedded into stochastic turbulent wind field: Most likely gust shape calculated from correlation matrix R and a given criterion . total jump in wind speed at given location EWEC 2022, Athens Martin Geyler 15 RealTime Simulation: Turbulent Wind Field Input (2) Averaged autopower spectrum for simulated wind fields Example for extreme gust event Criterion: ?v = 10 m/s, ?t = 16 s, location EWEC 2022, Athens Martin Geyler 16 3D visuali
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