The variation-based complementarity metrics system proposed by this study attempts to describe the complementarity among multiple energy resources as comprehensively as possible and provides sufficient evidence for decision makers. Generally, the wind and solar resources in China have a gratifying complementarity.
It can be seen from the spatial distribution that wind and solar resource complementarity is relatively high in northwest, northeast, and central China, while the complementarity in the southwest and southern areas of China is relatively low.
That said, the complementary use of wind and solar resources combined, also known as hybrid systems, is attractive. Hybrid systems are complementary even when availability values are not entirely complementary, called imperfect complementarity .
To this end, we propose a novel variation-based complementarity metrics system based on the description of series’ fluctuation characteristics from quantitative and contoured dimensions. From this, the complementarity between wind and solar resources in China is assessed, and the trend and persistence are tested.
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