Nacelle-mounted Lidars are increasingly used for power performance verifications. The IEC 61400-50-3 standard, to be published in 2020, will support the development of these practices with a clear and shared methodology, from calibration and installation of the sensor to uncertainty calculation and final reporting.
The advised method for calculating calibration uncertainties can seem hard to put into practice for most actors of the wind energy. It uses a numeric method to calculate the uncertainties on Wind Field Characteristics (WFC) reconstructed such as Horizontal Wind Speed (HWS) and Wind Direction (WD): the Monte Carlo Method (MCM).
Our objective here is to present how to propagate them on the WFC with the MCM and what are its advantages.
To do so we will use the case of Leosphere’s Wind Iris PO (WI PO) nacelle-mounted Lidar calibration