Dynamic inner independent component analysis-based incipient fault detection for electric drive systems of high-speed trains

The operating data of high-speed train electric drive systems contain unknown disturbances and noise, which makes it challenging to identify incipient faults. In order to improve the incipient fault detection capability of the electric drive system, a fault detection algorithm based on dynamic inner independent component analysis is proposed. In this paper, a mathematical proof of the dynamic inner independent component analysis algorithm is first given, and then the method is validated by means of an electric drive system simulation platform. The simulation results show that the dynamic fault detection method proposed in this paper can effectively monitor the operating status of the electric drive system without the need to establish a mathematical model of the system and expertise. Compared with the fault detection methods based on independent component analysis and principal component analysis, the proposed method decreases the fault detection time and reduces the false alarm rate and missing alarm rate.