Feasibility analysis of PV and energy storage system integration for flexible distribution networks: A moment-based distributionally robust approach

With the requirements of carbon neutrality and scientific and technological progress, massive distributed renewable energy resources have been integrated in distribution networks. The flexible interconnected distribution networks (FDNs) provide an effective way to avoid the negative effects of power quality, network loss and relay protection. This paper proposes a feasibility analysis model of distributed photovoltaic power generations (PVs) integration for FDNs based on distributionally robust. It uses moment-based ambiguity sets to model the uncertainty of PV outputs. Based on the circular constraint linearization method and duality theory, the solution method of the above model is designed. In this paper, two typical FDN structures are considered, namely, the closed-loop flexible interconnected structure between feeders and the flexible interconnected structure between feeder loops. The hosting capacity of the PV and energy storage system of the two structures is analyzed in case study, and the effectiveness of the proposed model and method is verified.