Development of Trouble Diagnosis Technology of 50W Grade Small Wind Turbine Generator

Abstract

Establishment of an early trouble diagnosis system is demanded to prevent damage of wind turbine generator. Therefore, AE signal occurring by the damage of a wind blade was detected with the AE sensor which installed to the body of wind turbine generator and a pole. In this study, length of a blade of a small wind turbine generator was changed as simulated trouble in the constant wind velocity. The AE signal which occurred at this time was measured with an AE sensor. The signal was processed by FFT analysis, and a change of spectrum strength was examined. Then, trouble diagnosis technology of 50W grade small wind turbine generator was developed. As the results, a method to count the number of times more than threshold of AE signals was suggested by a wave pattern of an AE signal. It was understood that the number of the count was decided as standard to judge normality or abnormality of 50W grade small wind turbine generator.