Presentation Description: Several floating lidar systems (FLS) have achieved The Carbon Trust Offshore Wind Accelerator (OWA) Roadmap Stage 3 maturity status meaning that a unit pre-deployment verification offshore is no longer mandatory. However, these validations are used to inform the FLS measurement uncertainty in a preconstruction energy assessment. When this risk-based approach is utilized, there is a gap in the uncertainty model. This unknown may lead to inaccurate wind measurement uncertainties in a windfarm preconstruction energy assessment. DNV has developed a methodology to calculate FLS measurement uncertainty when a Stage 3 floating lidar has not undertaken a pre-deployment verification. Harnessing a database of real-world floating lidar verifications, and the envelope of significant environmental variables and uncertainty requirements provided in the new IEC 61400-50-4, meaningful uncertainties to preconstruction energy assessment employing FLS are realized.
