Propagation Characteristics and Identification of High-Order Harmonics of a Traction Power Supply System

High-order harmonics in the traction power supply show negative effects on safe and stable operation of railway transportation system. There is a fixed resonant frequency network. When harmonic current produced by locomotive matches network, it will cause high-frequency overvoltage. The propagation path high-order load analyzed based V/v wiring transformer. characteristics self-used equipment at 380 V low-voltage side 27.5 kV high-voltage are expounded. A simulation model for self-consumption system established singular value decomposition algorithm proposed to identify impedance. results that method can reduce error within 0.1%. Under realistic conditions, overvoltage caused difficult identify. To solve this problem, an identification Electric Multiple Units convolutional neural network proposed. ShuffleNet then used other types overall accuracy classification be improved from 97.12% 98.44%. Better recognition performances also achieved.