The invention discloses a photovoltaic power station control system, which comprises n sequentially arranged photovoltaic arrays U1, U2, U3...Un, and is characterized in that the output ends of the n photovoltaic arrays are connected to an energy management system, the input ends of the n photovoltaic arrays are sequentially connected with n inverters correspondingly, the n inverters are connected to a power station power splitter, and the power station power splitter is further connected to the energy management system. The invention further discloses a photoelectricity delivery control method based on the photovoltaic power station control system and a peak regulation control method based on the photovoltaic power station control system. According to the invention, a problem existing in the prior art that the wind power accepting capacity of a power grid is affected by large-scale access of photoelectricity is solved.