dc.contributor.advisor | Sørensen, Asgeir Johan | |
dc.contributor.author | Smilden, Emil | |
dc.date.accessioned | 2019-09-11T08:49:47Z | |
dc.date.created | 2015-09-01 | |
dc.date.issued | 2015 | |
dc.identifier | ntnudaim:14046 | |
dc.identifier.uri | http://hdl.handle.net/11250/2614982 | |
dc.description.abstract | A simulation model based on a 10MW wind turbine is developed to test the performance of a speed exclusion zone algorithm with the purpose of preventing tower resonance. The model includes rotor aerodynamics, drive-train and generator dynamics, and finite element formulation of the tower and substructure. A rotor speed controller is also implemented. The algorithm is able to reduce tower vibration at the expense of power output.
To properly test the algorithm a wind model for simulation of thrust variations on a wind turbine is developed. The wind model accounts for wind shear, tower shadow, turbulence and rotor sampling. Wind shear is shown to have a depleting effect on the mean thrust and tower shadow is shown to cause significant thrust variations oscillating with the blade passing frequency. Turbulent wind fluctuation cause low-frequency thrust variations in addition to thrust oscillating with the blade passing frequency. | en |
dc.language | eng | |
dc.publisher | NTNU | |
dc.subject | Marin teknikk, Marin kybernetikk | en |
dc.title | Preventing Tower Resonance Induced by Thrust Variations on a Large 10MW Wind Turbine | en |
dc.type | Master thesis | en |
dc.source.pagenumber | 102 | |
dc.contributor.department | Norges teknisk-naturvitenskapelige universitet, Fakultet for ingeniørvitenskap,Institutt for marin teknikk | nb_NO |
dc.date.embargoenddate | 10000-01-01 | |