Abstract
Fatigue and destruction in the shafts of a wind turbine caused by sub-synchronous oscillations during power system faults is critical for wind turbine reliability. This paper investigates a three-mass shaft model according to a MW class doubly-fed wind generator shaft mechanical structure and obtains the electromagnetic torque of a wind turbine by PSCAD simulation when sub-synchronous oscillation occurred in power system. The equivalent load spectrum is obtained via the rain flow counting method. The finite element model of the gear is set up by Solidworks software. And then it is meshed by ANSYS software and finally the equivalent Von-Mises stress is achieved. The fatigue damage of transmission gear caused by sub-synchronous torsional vibration loads was assessed through Ncode software based on the S-N theory and Miner theory, and then it carries on the analysis of reliability. To sum up, the paper provided an analysis of the fatigue damage of wind turbine shafts caused by sub-synchronous oscillations of various durations during power system faults. The results are helpful to predict the fatigue life of wind turbine gear, to better maintain wind turbine shafts in time and to improve the safety and reliability of wind power system.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
