A current perturbation twophase maximum power point tracking(MPPT) control method is proposed, which divides MPPT into three regions by the combination of PV and IV curves. In current and voltage source regions, which adjusts the working point current of the PV array near the maximum power point(MPP) by shortcurrent method. Later current perturbation and observation(P&O) method is adopted to regulate the PV array operating point to achieve the MPP accurately. The shortcurrent method is introduced to determine the upper and lower boundary of the threshold function under different light intensities. The linear equivalent circuit model of PV array is established, analyzing its amplitude frequency and phase frequency characteristics, stability of the closed loop parameters are obtained. The proposed method has been applied to 115 V/400 Hz standalone PV power generation system. The simulation and experiment of system show that the system runs stably and maintains a good working condition. The results prove the proposed method is quite more feasible and correct.