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Lee, Jong WonAbstractA method to detect rotor mass imbalance, which is one of the ty pical faults of wind turbine, is presented for effective condition monitoring of wind turbine. Dynamic analysis for a th ree-bladed horizontal-axis wind turbine was carried out with adding mass to a blade for inflicting the rotor mass imbalance. It has been found that the added mass induce a resulting centrifugal force to nacelle and this leads to a tran sverse (relative to the rotor axis) oscillation of the nacelle. It has been also found that the amplitude of the oscillation is al most linearly increased as the added mass is increased.Keywords : Mass imbalance, Wind turbine, Condition monitoring, Transver se oscillation, RMS

Sensing Technique of Mass Imbalance for Condition Monitoring of Wind Turbine Blade