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The objective of this work is to reduce the storage dimensions required tooperate a coupled photovoltaic (PV) and Battery Energy Storage System (BESS) inan electricity market, while keeping the same level of performance. Performanceis measured either with the amount of errors between the energy sold on themarket and the actual generation of the PV/BESS i.e. the imbalance, or directlywith the revenue generated on the electricity market from the PV/BESSoperation. Two solutions are proposed and tested to reduce the BESS sizerequirement. The first solution is to participate in electricity markets withan aggregation of several plants instead of a single plant, which effectivelyreduces the uncertainty of the PV power generation. The second is toparticipate in an intra-day market to reduce the BESS usage. To evaluate theeffects of these two solutions on the BESS size requirement, we simulate thecontrol of the PV/BESS system in an electricity market.

Sizing of a PV/Battery System Through Stochastic Control and Plant Aggregation