Theoretical and experimental study on wind wheel unbalance for a wind turbine

In order to ensure safety of wind turbines using non-grid-connected wind power and to reduce the occurrence of faults, as well as to improve the reliability of wind turbines, three different wind wheel unbalance faults are researched through theoretical analysis and experimental simulation in laboratory conditions. A wind turbine test rig has been established and a wind turbine condition monitoring has been developed. Three wind wheel unbalance faults are simulated on the test rig, and by analyzing the experimental results of power output and vibration characteristics in different conditions, the influence of wind wheel unbalance on power output and vibration characteristics is presented.