Automatic bearing fault diagnosis of permanent magnet synchronous generators in wind turbines subjected to noise interference. (9th January 2018)

• Record Type: Journal Article
• Authors: Guo, Jun; Lu, Siliang; Zhai, Chao; He, Qingbo
• Is Part Of: Measurement science & technology. Volume 29:Number 2(2018:Feb.)
• Publication Date: 2018-01-09
• Subjects: bearing fault diagnosis -- vibration signal processing -- current signal processing -- order analysis -- adaptive stochastic resonance -- wind turbine; Physical measurements -- Periodicals; Scientific apparatus and instruments -- Periodicals; Equipment and Supplies -- Periodicals; Science -- instrumentation -- Periodicals; Technology -- instrumentation -- Periodicals; Mesures physiques -- Périodiques; Physical measurements; Scientific apparatus and instruments; Periodicals; 502.87
• DOI: 10.1088/1361-6501/aa92d6
• Languages: English
• ISSNs: 0957-0233

Abstract

Abstract: An automatic bearing fault diagnosis method is proposed for permanent magnet synchronous generators (PMSGs), which are widely installed in wind turbines subjected to low rotating speeds, speed fluctuations, and electrical device noise interferences. The mechanical rotating angle curve is first extracted from the phase current of a PMSG by sequentially applying a series of algorithms. The synchronous sampled vibration signal of the fault bearing is then resampled in the angular domain according to the obtained rotating phase information. Considering that the resampled vibration signal is still overwhelmed by heavy background noise, an adaptive stochastic resonance filter is applied to the resampled signal to enhance the fault indicator and facilitate bearing fault identification. Two types of fault bearings with different fault sizes in a PMSG test rig are subjected to experiments to test the effectiveness of the proposed method. The proposed method is fully automated and thus shows potential for convenient, highly efficient and in situ bearing fault diagnosis for wind turbines subjected to harsh environments.