Harmonic current elimination for single-phase rectifiers based carrier phase-shift

The technique of carrier phase-shift control is employed by CRH four-quardrant inverter to eliminate ultraharmonics on the side of traction grid. In this paper, this technique is assessed theoretically over four-quardrant pulse rectifier. According to the example of Japanese 300# EMU phase shift and the assessment of the test data from an EMU type in China, carrier phase shift proved effective and practical in suppressing EMU from injecting harmonic in the grid side.