The Harmonic Suppression Characteristic Analysis of a Phase-Shifting Reactor in Rectifier System

In this paper, the selection principle of phase-shifting angle is proposed, and the relationship between phase-shifting angle and winding turns are obtained from the current and voltage phasor diagrams. A six-phase rectifier system with a phase shifting reactor (PSR) is built using SIMULINK. The current waveforms, the voltage waveforms, and the harmonic current spectrum diagram illustrate that the PSR can reduce the harmonic current efficiently through phase shifting. Meanwhile, the low-pass filter performance of the PSR is studied by frequency sweep with PSpice software. The amplitude-frequency characteristics show that the PSR with a certain phase-shifting angle has the performance of a low-pass filter. Therefore, in the harmonic suppression of rectifier system with different loads, the phase-shifting characteristics and filter performance of the PSR need to be taken into account simultaneously.