Abstract

With the rapid development of China’s electrified railway, vehicle network harmonic oscillation attracts more attention. The four-quadrant converter is an important part of the traction drive system. Based on its main circuit and control strategy, different vehicle network harmonic oscillation are classified by the mechanism and frequency into mediate-frequency harmonic oscillation and high- frequency harmonic oscillation. Their control loop transfer function are established separately and their main influencing factors are analyzed. Use the main circuit parameters of China’s electrified railway to establish a Simulink model. Analyze current wave and its FFT result to compare the harmonic oscillation situation. The simulation results verify the correctness of the analysis.

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