부산대학교 도서관

In context with the achievement of climate targets by using renewable energies, a bistatic wind lidar (light detection and ranging) has been developed and set up at the Physikalisch-Technische Bundesanstalt (PTB) in recent years. This wind lidar enables the traceability of wind velocities being necessary for wind turbines in heights from 5 m to 250 m with the smallest measurement uncertainties in any terrain, and thus for the first time provides an independent alternative to previously used, costly wind met masts. The intended application of the PTB lidar as a traceable transfer standard in the field of wind speed remote sensing demands, in addition to prior comparative measurements in free terrain with other wind speed remote sensing devices, a detailed investigation of the PTB lidar under controllable flow conditions to validate its measurement uncertainty and monitor its long-term stability. For this reason, a new, specially constructed wind tunnel with a laser Doppler anemometer (LDA) as flow velocity standard was erected on a platform at a height of 8 m at the Competence Center for Wind Energy (CCW) of PTB. This enables the PTB lidar to be positioned below the wind tunnel test section and to perform flow velocity measurements with the wind lidar that are traceable to the SI units. The Göttingen-type wind tunnel has an open test section with a length of 75 cm and a cross-sectional area of 50 × 50 cm2. In the test section, a high flow homogeneity and a low degree of turbulence of