Analysis and Suppression of Electromagnetic Compatibility of High Speed Railway Traction Current Harmonic to Track Circuit

With the construction of high-speed railway and passenger dedicated line, the electric locomotive and power supply return system are becoming more and more complex, and the interference to the track circuit is more and more. In order to reduce the influence of the harmonic current on the EMC of the track circuit, this paper proposes a method based on the multiple control strategy. Firstly, the structure and topology of multichannel control rectifier are introduced, and then the influence of carrier modulation and carrier drift on harmonic voltage and current of train is analyzed in detail. Finally, the effectiveness of harmonic analysis method and harmonic suppression method is verified by simulation and experiment.