Optimal Configuration of Distribution Network Substitutive Energy Storage for Economic Operation and Renewable Energy Accommodation

With the growing share of renewable energy sources (RES), configuring substitutive energy storag system (SESS) in distribution networks to mitigate the fluctuations of renewable energy hold significant importance. To this end, an optimal approach for configuring substitutive energy storage is proposed in this paper, aimed at the cost-effective operation of the distribution system and the accommodation of renewable energy. Firstly, a collaborative operation model of SESS in distribution networks and user-side energy storage is constructed, and the operation mode of SESS in the distribution network is analyzed. Then, with the minimization of the distribution network planning and operation cost as the objective function, an optimization model for the siting and sizing of SESS in the distribution network is established to achieve energy storage planning. On this basis, based on stochastic programming to represent the uncertainty in wind and solar power generation, the configuration model is linearized using a penalty factor method. Finally, case studies are conducted on the modified 33-nodes distribution network to confirm the proposed method's effectiveness and practicality.