Abstract: As wind power and photovoltaic power generation are greatly affected by natural factors,their output is random and volatile, which will seriously affect the peak regulation capacity of the power system. First,according to the output characteristics of wind power,this paper evaluates the wind power consumption capacity of the regional power grid from the perspective of system peak load regulation capacity. Second,according to the complementarity of wind power and photovoltaic power generation in time scale, an optimization model is established with the lowest system load loss rate and the minimum wind and photovoltaic curtailment rate as the objective. Finally,the effectiveness of the proposed method is verified by using the historical data of wind power,photovoltaic power generation and load of the actual regional power grid. The results show that the output power of wind power and photovoltaic power generation is optimized by using the wind/photovoltaic complementary optimization strategy, and the system output fluctuation is reduced and the consumption capacity is significantly improved.