wind-higher-uncertainty-20.html
DTU Vind 2016
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annual report 2016 19 education name: jianting du nationality: chinese
project
title: coupling atmospheric and wave models for storm cinditions supervision: xiaoli guo larsen abstract: my phd
project
is to couple the atmospheric model and the ocean wave model for storm simulations, especially for the coastal areas in the north sea. for this particular purpose, an offline coupled
wind
-wave modelling system: wrfmike 21 sw is developed for the coastal areas, and an online coupled
wind
-wave mod- elling system: wrf-swan is implemented for north sea storm simulations. in the coupling, the atmospheric model provides 10 meter
wind
speed to the wave model and the wave model feeds back the sea surface roughness length (z0). sensitivity study shows that the state-of- the-art z0 parameterization approaches cannot represent the complicity of the sea state in storm conditions and in coastal areas. we devel- oped a dynamical coupled interface, namely, a wave boundary layer model (wblm) based on the momentum and kinetic energy conservation in the air-sea interface. the wblm is imbedded in swan as a new
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-input source function for the calculation of the wave growth and the estimation of the sea surface stress. the new wblm approach is proved to be able to improve both the
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and wave simulations through idealized fetch-limited study and real storm simulations. name: kristine munk jespersen nationality: danish
project
title: fatigue damage evolution in fibre composites for
wind
turbine blades supervision: lars pilgaard mikkelsen abstract: this phd
project
experimentally examines fa- tigue damage evolution in a uni-directional non- crimp fabric based glass fibre composite used for the main load carrying parts of a
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tur- bine blade. x-ray computed tomography is used to study the damage initiation and progression in 3d by intially examining the damage and one damage state, and later at several states by time-lapse x-ray ct experiments. from the ex- perimental results, both initiation and progres- sion of the damage has been observed. it has given important knowledge required to improve the fatigue properties of the material and also in relation to how the mechanisms can be mod- elled to predict the fatigue life in future studies. name: jayachandra naidu sakamuri nationality: indian
project
title: coordinated control of
wind
power
plants in offshore hvdc grids supervision: nikolaos a. koutouloulis abstract: the objective of this
project
is to devel- op, implement, and test control strategies for offshore
wind
power
plants connected through multi terminal hvdc grid to pro- vide ancillary services such as frequency support, voltage,
power
oscillation damp- ing, and fault ride through capability. more specifically, the objectives of the
project
are focused on the investigation of the technical capabilities and control charac- teristics of large offshore
wind
farms con- nected to hvdc grid and on the develop- ment of control strategies that will allow the effective delivery of ancillary services from hvdc grid with large amounts of
wind
power
. north sea has created additional market for hvdc connection between onshore ac grid across borders and wpps, loads at offshore platforms for the exchange of
power
and balancing services. this
project
will provide the technical solutions to pro- vide ancillary services from offshore wpp to onshore ac grid which will enhance the penetration of
wind
power
in
power
sys- tems.
wind-nacelle-lidar-22.html