Abstract: When a photovoltaic power station outputs,other power sources in the power grid need to adjust their output to ensure that the load is powered by photovoltaic power generation. In this adjustment process,due to the randomness and intermittence of photovoltaic power generation,it is difficult to control the stability of its power supply power. To this end,this paper proposes a regulation method for photovoltaic power generation to participate in the regulation of power supply stability in the power grid. First,the model of the grid-connected photovoltaic power generation system is constructed,and the mode of solar energy conversion into electric energy and the influencing factors of its fluctuation are obtained. The double loop control is used to assist in the regulation of power supply power stability,and the change form of working mode of the converter at each end is obtained. By controlling the droop characteristics of each port,photovoltaic power generation participates in the regulation of power supply power stability of the power grid. The experimental results show that the power oscillation amplitude of the proposed method is small when adjusting the power supply power stability. When the DC current is 0.25 k A,0.3 k A and0.35 kA respectively,the power regulation effect of the proposed method is ideal and the time consumed is shorter.