Preface |
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xv | |
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xxvii | |
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1 Looking forward: the promise and challenge of exascale computing |
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1 | (22) |
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1 | (5) |
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1.1.1 Future wind plant technology |
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2 | (1) |
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1.1.2 Physical scales driving HFM and HPC |
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2 | (1) |
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1.1.3 Turbine technology changes requiring HFM and HPC |
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3 | (2) |
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1.1.4 Wind plant performance |
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5 | (1) |
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1.2 Mathematical and numerical modelling pathways |
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6 | (6) |
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1.3 Challenges at petascale and the need for exascale |
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12 | (2) |
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1.4 The challenge of exascale computing |
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14 | (4) |
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18 | (5) |
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19 | (1) |
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19 | (4) |
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2 Blade-resolved modeling with fluid-structure interaction |
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23 | (42) |
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2.1 The extraordinary range of length and time scales relevant to wind-turbine operation |
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26 | (10) |
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2.1.1 Impacts of atmospheric "microscale" turbulence |
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26 | (5) |
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2.1.2 The rotor and blade-boundary-layer response length and time scales |
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31 | (3) |
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2.1.3 The wake response length and time scales |
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34 | (1) |
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2.1.4 Influences from atmospheric mesoscales and related weather events |
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34 | (1) |
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2.1.5 Concluding discussion |
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35 | (1) |
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2.2 Essential numerical and modeling elements in blade-resolved simulation of wind turbines |
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36 | (17) |
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2.2.1 CAD model and mesh generation |
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36 | (3) |
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39 | (5) |
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2.2.3 Turbulence modeling |
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44 | (7) |
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2.2.4 Fluid-structure interaction |
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51 | (2) |
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2.3 Practical issues in performing blade boundary-layer-resolved simulations |
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53 | (2) |
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53 | (1) |
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53 | (1) |
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2.3.3 Convergence and time step |
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53 | (1) |
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54 | (1) |
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55 | (1) |
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2.4 Conclusions and challenges for future advancement in the state-of-the-art |
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55 | (10) |
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58 | (1) |
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58 | (7) |
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3 Mesoscale modeling of the atmosphere |
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65 | (52) |
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3.1 Introduction to meteorology for wind energy modeling |
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65 | (6) |
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3.1.1 Forces and the general circulation of the atmosphere |
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65 | (2) |
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3.1.2 Scales and phenomena in the atmosphere |
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67 | (2) |
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3.1.3 Atmospheric energetics |
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69 | (2) |
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3.1.4 The chaotic nature of atmospheric flow |
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71 | (1) |
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3.2 Basics of atmospheric modeling |
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71 | (12) |
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3.2.1 Historical perspective |
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71 | (2) |
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3.2.2 Governing equations for flows in the atmosphere |
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73 | (1) |
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3.2.3 Numerical resolution requirements |
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74 | (1) |
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3.2.4 Reynolds averaged Navier-Stokes simulation methodology |
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75 | (5) |
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80 | (1) |
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3.2.6 Forcing physics and parameterizations |
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80 | (3) |
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3.3 Initial conditions and data assimilation |
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83 | (6) |
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83 | (2) |
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85 | (1) |
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3.3.3 Ensemble Kalman filters |
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86 | (1) |
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3.3.4 EnVar and hybrid DA |
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87 | (2) |
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89 | (3) |
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3.4.1 Forcing from global models |
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89 | (1) |
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89 | (1) |
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89 | (3) |
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92 | (1) |
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3.5 Using NWP for wind power |
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92 | (7) |
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3.5.1 Resource assessment |
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93 | (1) |
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94 | (1) |
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3.5.3 Turbine wake parameterization |
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94 | (1) |
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95 | (1) |
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96 | (3) |
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3.6 Uncertainty quantification |
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99 | (1) |
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3.6.1 Quantifying parametric uncertainty |
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99 | (1) |
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3.6.2 Quantifying structural uncertainty---ensemble methods |
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99 | (1) |
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3.6.3 Calibrating ensembles |
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100 | (1) |
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100 | (1) |
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100 | (3) |
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3.7.1 Storm-scale prediction |
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101 | (1) |
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101 | (1) |
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3.7.3 Blended global/mesoscale models |
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101 | (1) |
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3.7.4 Seasonal to subseasonal prediction |
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101 | (1) |
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3.7.5 Regime-dependent corrections |
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102 | (1) |
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3.8 Summary and conclusions |
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103 | (14) |
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103 | (14) |
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4 Mesoscale to microscale coupling for high-fidelity wind plant simulation |
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117 | (66) |
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117 | (3) |
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4.1.1 Overview of atmospheric simulation at meso and microscales |
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118 | (2) |
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4.2 Large-eddy simulation of the atmospheric boundary layer |
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120 | (18) |
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122 | (6) |
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128 | (5) |
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4.2.3 Unsteady conditions |
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133 | (2) |
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135 | (3) |
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4.3 Enabling multiscale simulation |
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138 | (17) |
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4.3.1 Methods to extend the applicability of periodic LES |
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138 | (2) |
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4.3.2 Coupling LES to mesoscale model output at lateral boundaries |
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140 | (12) |
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4.3.3 Online versus offline coupled simulations |
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152 | (3) |
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4.4 Additional challenges facing high-fidelity multiscale simulation |
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155 | (28) |
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155 | (7) |
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4.4.2 Flow transition at coarse-to-fine LES refinement |
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162 | (2) |
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4.4.3 Bottom boundary condition |
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164 | (3) |
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167 | (3) |
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170 | (13) |
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5 Atmospheric turbulence modelling, synthesis, and simulation |
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183 | (34) |
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183 | (2) |
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5.1.1 Notation and ensemble averaging |
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183 | (1) |
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5.1.2 Defining the notion of turbulence simulations |
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184 | (1) |
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5.2 Simulating turbulence for wind turbine applications |
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185 | (1) |
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5.3 Turbulence in the atmospheric boundary layer |
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186 | (6) |
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5.3.1 Surface-layer scaling and Monin-Obukhov similarity theory |
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187 | (4) |
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5.3.2 Above the surface layer: typical wind turbine rotor heights |
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191 | (1) |
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5.4 Which characteristics of turbulence affect wind turbines? |
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192 | (2) |
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5.5 Synthetic turbulence and standard industrial approach |
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194 | (11) |
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5.5.1 Statistical attempts |
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194 | (1) |
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5.5.2 Standard spectral models |
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194 | (8) |
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5.5.3 Extensions of the spectral-tensor model |
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202 | (3) |
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5.6 Large eddy simulation |
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205 | (6) |
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205 | (2) |
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207 | (2) |
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209 | (2) |
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211 | (6) |
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211 | (6) |
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6 Modeling and simulation of wind-farm flows |
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217 | (56) |
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217 | (2) |
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6.2 Why simulate the flow through wind plants? |
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219 | (5) |
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6.2.1 Improved physical understanding |
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220 | (2) |
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222 | (1) |
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223 | (1) |
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6.2.4 Special cases of interest and forensic analysis |
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223 | (1) |
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6.2.5 Design of experiments |
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223 | (1) |
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6.3 Simulation approaches |
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224 | (32) |
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6.3.1 Noncomputational-fluid-dynamics-based approaches |
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224 | (14) |
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6.3.2 Computational-fluid-dynamics-based approaches |
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238 | (18) |
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256 | (3) |
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259 | (14) |
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261 | (1) |
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261 | (12) |
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7 Wind-plant-controller design |
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273 | (28) |
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273 | (4) |
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7.1.1 Structure of the chapter |
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273 | (1) |
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7.1.2 Current practice in wind farm operation |
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274 | (1) |
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7.1.3 Degrees of freedom in the wind farm control problem |
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275 | (1) |
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7.1.4 Objectives of wind farm control |
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276 | (1) |
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7.2 A classification of wind farm control algorithms |
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277 | (3) |
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7.2.1 Current practice; greedy operation |
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277 | (1) |
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7.2.2 Open-loop model-based controller synthesis |
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278 | (1) |
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7.2.3 Closed-loop model-based controller synthesis |
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279 | (1) |
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7.2.4 Closed-loop model-free controller synthesis |
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279 | (1) |
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7.3 Control-oriented modeling |
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280 | (2) |
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7.3.1 Steady-state surrogate models |
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280 | (1) |
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7.3.2 Control-oriented dynamical surrogate models |
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281 | (1) |
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282 | (8) |
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7.4.1 Steady-state wind farm model: FLORIS |
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282 | (4) |
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7.4.2 Dynamical wind farm model: WFSim |
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286 | (4) |
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7.5 Software architecture |
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290 | (4) |
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7.5.1 Centralized vs. distributed control |
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290 | (3) |
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7.5.2 Communication with other simulation submodels |
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293 | (1) |
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294 | (7) |
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295 | (1) |
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296 | (5) |
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8 Forecasting wind power production for grid operations |
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301 | (46) |
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8.1 The role of wind-power forecasting |
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301 | (1) |
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8.2 Sense: gathering and ingestion of predictive information |
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302 | (4) |
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303 | (1) |
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8.2.2 Observation targeting |
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304 | (2) |
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8.3 Model: translating predictive information into a forecast |
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306 | (26) |
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8.3.1 Physics-based techniques |
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306 | (4) |
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8.3.2 Statistical approaches |
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310 | (19) |
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8.3.3 Power output models |
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329 | (1) |
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8.3.4 Integrated forecast system |
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330 | (2) |
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8.4 Communicate: inform the user for decision-making |
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332 | (2) |
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8.4.1 Deterministic versus probabilistic |
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332 | (1) |
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8.4.2 Time series versus event-based |
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333 | (1) |
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8.5 Assess: evaluation of forecast performance |
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334 | (13) |
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344 | (3) |
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9 Cost of wind energy modeling |
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347 | (30) |
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347 | (2) |
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9.2 Levelized cost of energy (LCOE) |
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349 | (1) |
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9.3 Overview of cost of energy modeling |
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350 | (3) |
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9.4 Modeling investment costs |
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353 | (2) |
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9.5 Modeling energy production |
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355 | (3) |
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9.6 Modeling operational expenditures |
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358 | (4) |
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9.7 Modeling cost of capital |
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362 | (3) |
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9.8 Calculating cost of energy |
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365 | (1) |
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9.9 Estimating future cost of wind energy |
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366 | (1) |
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9.10 Considering the value of wind energy |
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367 | (4) |
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371 | (6) |
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371 | (1) |
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371 | (6) |
Index |
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