The application of a kind of OEW three-phase and six-arm bridge topology in SVG is introduced in this paper. As for the zero sequence of OEW transformer

the mathematical model analysis for the transformer is performed. The double Fourier analysis is used for frequency spectrum calculation of the output voltage of the system and the cause for the generation of zero sequence of the system is found. A kind of virtual angle modulation method is adopted to suppress zero sequence of the system. The system model under the virtual angle method is analyzed and the frequency spectrum calculation is performed. Finally

the effectiveness of the method is proved by the simulation experiment.