According to the low voltage transfer ratio of matrix converter (MC) and immune to the influence of abnormal input voltage for double feed inductor generator (DFIG) excited by MC, A Zsource sparse matrix converter suited for being used as excitation power supply for DFIG was presented. the voltage transfer ratio had been improved using the Zsource boost feature and the influence caused by abnormal input voltage had been avoided using closed loop control. The expression of the variable speed constant frequency wind power generation system of stator flux oriented vector control was deduced based on the analysis of the doublefed wind generators working principle and mathematical model. A experimental prototype had been built, the experimental results working under subsynchronous, synchronization and supersynchronous verified the feasibility and effectiveness of the proposed strategy.