Print Email Facebook Twitter Is replacing meteorological masts possible? Title Is replacing meteorological masts possible? Author Knoben, V.L. Contributor Bierbooms, W. (mentor) Holtslag, E. (mentor) Faculty Aerospace Engineering Department Aerodynamics Date 2016-09-20 Abstract The capability to acquire accurate and reliable measurements of the wind is essential for wind turbine validation and wind resource assessment. These measurements are typically done with tall meteorological masts (met-masts). However, as of 2004 the concept of remote sensing has started to become specialised in wind energy. A key requirement before full implementation can be accepted, is a fully traceable uncertainty chain. The aim of this thesis is closing the uncertainty chain by providing an innovative best practise guideline in order to establish a quantifiable and repeatable classification uncertainty. After the closure the viability of remote sensing to replace met-masts has been assessed. The classification uncertainty comprises several steps, of which the assessment of interdependency of atmospheric variables was left open by the regulations. This thesis provides a tested automated procedure, hence contributes to both the wind industry and body of science. Based on the results of this thesis it was observed that the usage of thresholds, imposed by the regulations, led to erratic behaviour in the uncertainties. The acquired inconsistencies are significant to the extent that the author recommends not to use the classification uncertainties, and therefore the total uncertainties. As a direct result the author does not recommend a full replacement of met-masts. To improve the current uncertainty model, it is recommended to implement weighing functions to create a smoother output. Furthermore, additional requirements to the acceptance of binned data are recommended in order to avoid skewing of the regression due to biased data-sets, hereby increasing the robustness of the procedure. After these recommendations are implemented it is advised to do a second iteration of establishing the thresholds. Subject WindenergyRemoteSensingLidarSodarClassificationUncertaintyInterdependency To reference this document use: http://resolver.tudelft.nl/uuid:f916d017-a6f7-47b5-90da-a6d0a4cbacfd Embargo date 2016-09-20 Part of collection Student theses Document type master thesis Rights (c) 2016 Knoben, V.L. Files PDF Thesis_Viktor-Knoben.pdf 6.06 MB Close viewer /islandora/object/uuid:f916d017-a6f7-47b5-90da-a6d0a4cbacfd/datastream/OBJ/view