In order to reduce the harmonic generated by magnetically controlled reactor

a novel structure named multi-stage MCR was proposed.A magnetic circuit equivalent model of the multi-stage MCR was set up.The mechanism of self-harmonic suppression was analyzed.The calculation result shows that the proposed multi-stage MCR greatly reduce the generated harmonics without the assistance of external additional LC filters

reducing the five-order harmonic current from 6% to 3% in the case of half-rated-saturation.