Analysis of Wind-Solar Complementarity Considering Load Demand Across Multiple Time Scale

Fully exploiting the complementary characteristics of wind and solar energy is widely regarded as a crucial means to mitigate the volatility of renewable energy output. Existing complementarity assessment methods predominantly focus on the fluctuation cancellation of generation-side output while overlooking the dynamic characteristics of the load side, making it difficult to accurately reflect the systemic value of wind-solar complementarity in terms of source-load matching. To address this, this paper proposes a wind-solar complementarity evaluation metric that incorporates load demand and analyzes its effectiveness across different temporal scales. Compared with traditional complementarity assessment indicators, the proposed method more accurately characterizes the complementary effects of wind and solar resources within the context of actual supply and demand dynamics, providing robust support for the optimal planning and dispatch of future high-penetration renewable energy systems.