Dynamic Analysis of a Floating Vertical Axis Wind Turbine Under Emergency Shutdown Using Hydrodynamic Brake

K. Wang, Martin Otto Laver Hansen, T. Moan

Research output: Contribution to journalConference articleResearchpeer-review

560 Downloads (Pure)

Abstract

Emergency shutdown is always a challenge for an operating vertical axis wind turbine. A 5-MW vertical axis wind turbine with a Darrieus rotor mounted on a semi-submersible support structure was examined in this study. Coupled non-linear aero-hydro-servo-elastic simulations of the floating vertical axis wind turbine were carried out for emergency shutdown cases over a range of environmental conditions based on correlated wind and wave data. When generator failure happens, a brake should be applied to stop the acceleration of the rotor to prevent the rotor from overspeeding and subsequent disaster. In addition to the traditional mechanical brake, a novel hydrodynamic brake was presented to apply to the shutdown case. The effects of the hydrodynamic brake on the platform motions and structural loads under normal operating conditions and during the emergency shutdown events were evaluated. The use of both the hydrodynamic brake and mechanical brake was also investigated. The application of the hydrodynamic brake is expected to be efficient for rotor shutdown and for reducing the platform motions and structural loads.
Original languageEnglish
JournalEnergy Procedia
Volume53
Pages (from-to)56-69
Number of pages14
ISSN1876-6102
DOIs
Publication statusPublished - 2014
EventEERA DeepWind 2014 - 11th Deep Sea Offshore Wind R&D Conference - Radisson Blu Royal Garden Hotel, Trondheim, Norway
Duration: 22 Jan 201424 Jan 2014
Conference number: 11
http://www.sintef.no/Projectweb/Deepwind_2014/

Conference

ConferenceEERA DeepWind 2014 - 11th Deep Sea Offshore Wind R&D Conference
Number11
LocationRadisson Blu Royal Garden Hotel
Country/TerritoryNorway
CityTrondheim
Period22/01/201424/01/2014
Internet address

Keywords

  • Emergency shutdown
  • Floating vertical axis wind turbine
  • Platform motion
  • Hydrodynamic brake

Fingerprint

Dive into the research topics of 'Dynamic Analysis of a Floating Vertical Axis Wind Turbine Under Emergency Shutdown Using Hydrodynamic Brake'. Together they form a unique fingerprint.

Cite this