For extending the power and improving the performance of SVG, a topology with several parallel plugging convertor modules is obtained, which has no common DC bus. In respect that the parameter difference among converters, reactive power of total output sharing has to be resolved. In this article, mathematics model with DQ analytic transformation is analyzed. Based on double close-loop decoupling control, and direct current control, a reactive power balance current sharing method is proposed. By using CPS-SPWM, the current harmonic of SVG is reduced, which is indicated by simulation result. Further, in order to apply the method to project application, a 2Mvar platform with a double FPGA-DSP controller broad is carried out. The simulation and practical performance of SVG are given. The validity and feasibility of the method is demonstrated by the results.