Abstract: With the massive development of distributed renewable resources, photovoltaic (PV) prosumer groups have emerged. However, the inherent characteristics of PV power generation can affect the safe and stable operation of the distribution grid. Research has been conducted to mitigate the impact mainly through pricing to promote in-situ sharing and configuration of energy storage systems, neglecting the pricing of transactions within the PV prosumers group. Therefore, this paper proposes a two-stage economic operation model for PV prosumers based on shared energy storage offered by service providers. In the first stage, the seller and the buyer of electricity are divided according to the load shortages of PV producers and consumers in different time periods, and the internal tariff is determined based on the supply-demand ratio and optimized considering the economic benefits and comfort requirements of PV producers and consumers. In the second stage, an economic model of the service providers investment in shared energy storage is proposed. A case study is conducted on a PV prosumer park in Hubei. The results show that the PV prosumers group can effectively reduce the electricity cost, and the service provider can obtain higher revenue by adding shared energy storage systems.

Key words: photovoltaic prosumer groups, internal trading, pricing, service providers, shared energy storage

摘要： 随着分布式可再生资源的大规模开发，光伏产消者群逐渐形成。然而，光伏发电的固有特性可能影响配电网的安全稳定运行。现有研究多通过定价机制促进就消纳享和配置储能系统来缓解该问题，但对光伏产消者群内部交易的定价策略的关注相对不足。为此，本文提出一种基于服务商共享储能的光伏产消者群两阶段经济运行模型。第1阶段，根据光伏产消者不同时段的负荷缺额情况划分卖电方与买电方，基于供需比确定内部电价，并综合考虑光伏产消者的经济效益和舒适度要求进行优化。第2阶段，构建服务商投资共享储能的经济运行模型。基于湖北地区某光伏产消者园区的案例分析表明，该模型能有效降低光伏产消者群的用电成本，同时服务商可通过共享储能系统获得更高收益。

关键词: 光伏产消者群, 内部交易, 定价, 服务商, 共享储能