Study on Characteristics of Multi-Phase Rectifier System Based on Phase-Shifting Reactor

In view of the harmonic problems caused by plenty of nonlinear load, especially large-capacity rectifiers, are becoming more and more serious, a kind of harmonic suppression method based on phase-shifting reactor (PSR) is studied in this paper. The problem of determination of the winding turns aiming at a certain phase-shifting angle is solved through theory analysis and calculation. And the topological structure of multi-phase rectifier system composed by cascade phase-shifting reactors is introduced. Also, a method of determining the phase-shifting angles is proposed and the characteristic harmonic of rectifier system is suppressed comprehensively. At last, simulation and experiment of twelve-phase rectifier system composed by phase-shifting reactors are made and the results show that using phase-shifting reactors can realize the same effect as phase-shifting transformers. The harmonic caused by rectifier system can be suppressed very well by phase-shifting reactors.