关键词: 光伏产消者群, 内部交易, 定价, 服务商, 共享储能

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