Quantitative evaluation of the complementarity and capacity ratio of large-scale wind power and photovoltaic

Aiming at the problem that the existing correlation analysis can’t clearly describe the change characteristics of wind power and photovoltaic, this paper takes the clean energy base in the upper reaches of the Yellow River as an example to study the complementarity between wind power and photovoltaic(PV), and analyzes their characteristics and change laws on multiple time scales. A multi-energy complementarity evaluation index system based on the description of fluctuation characteristics is used to evaluate the complementarity of wind and PV power. The results show that wind and PV power are complementary to each other in different time scales, that is, their superposition can reduce their own volatility. This paper further explores the changing law of complementarity under different wind and PV installation ratios, which helps to fully understand the complementarity between different energy sources such as wind and PV, and provides some scientific basis for the planning and design of clean energy bases.