Measurement representativeness
Mast and LiDAR siting are tested against elevation, exposure, roughness, slope, and turbine cluster coverage.
Complex terrain WRA
When simple WAsP is not enough.
Complex terrain changes the bankable wind case through ridge acceleration, flow separation, turbulence, spatial transfer, and turbine-position uncertainty. The method has to prove why WAsP, WindPRO/WAsP-CFD, OpenWind, or full CFD is appropriate.
Complex-terrain methodology
Flow-model selection
Linear flow models are used only where terrain supports them; WindPRO/WAsP-CFD, OpenWind, or CFD is scoped where flow separation risk is material.
Uncertainty uplift
Spatial transfer, vertical extrapolation, turbulence, wake, and terrain uncertainty are shown explicitly in the P75/P90 spread.
Decision checks
| Check | Why it matters | Report output |
|---|---|---|
| Slope and ruggedness index | Determines whether linear flow assumptions are credible | Model-selection memo |
| Mast-to-WTG transfer | Controls spatial uncertainty and P90 spread | WTG-wise wind climate and uncertainty |
| Turbulence and IEC class | Can trigger OEM load review or warranty concern | IEC 61400 suitability matrix |
| Wake in ridged terrain | Wake directionality may shift with terrain-induced flow | Wake sensitivity and layout note |