Abstract
The volatility of photovoltaic (PV) power generation affects its schedulability and friendly grid connection. Energy storage as a highly flexible and controllable regulation resource is regarded as a key technical means to smooth PV power output. This paper proposes a BESS power and capacity determination method based on the definition of maximum PV power volatility and gives an empirical formula for determining the energy storage capacity under different levels of PV output volatility. Furthermore, the determination of BESS under different maximum power volatility constraints and installed capacity of PV plants is also studied. It provides a reference for the actual energy storage planning with different renewable energy penetration levels, which is conducive to the friendly grid connection and dispatch of renewable energy power generation.
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