Optimised configuration of multi-energy systems considering the adjusting capacity of communication base stations and risk of network congestion

Dongfeng Yang, Xi Wang, Yong Sun, Jingying Yang, Xiaojun Liu and Chao Jiang

Energy, 2024, vol. 313, issue C

Abstract: The high percentage of renewable energy sources presents unprecedented challenges to the flexibility of power systems, and planning for the system's flexibility resources has become a necessary research area. Thus, this study constructs a flexibility quota mechanism and a two-stage model for the optimal configuration of multi-energy system coupling equipment to satisfy the growing demand for flexibility in city-level electricity-gas-heat-storage coupling systems. First, it examines the relationship between supply and demand for system flexibility, leading to the design of a flexibility quota mechanism. Subsequently, the power supply method for communication base stations shifts from direct networking to a hydrogen fuel cell supply. This flexibility quota mechanism encourages communication operators to actively engage in flexibility quota trading. Simultaneously, the safety constraints of heterogeneous energy-flow subsystems are considered while conducting comprehensive capacity planning for the coupling equipment of a multi-energy system. Finally, an optimisation strategy is proposed under the established capacity planning scheme for determining the siting and capacity of energy storage plants to address the potential transmission blockage risk in the power network. The case study employs the IEEE 14-bus power grid, a 7-node gas network, and an 8-node heat network test system to evaluate the optimal configuration of a city-level multi-energy coupled system model. The analysis considers four typical days to achieve this optimal configuration. By implementing a flexibility quota mechanism, the system's flexibility margin is increased by 7500 MW. Additionally, the proposed energy storage siting and capacity determination method reduces the risk of transmission congestion by 5–10 % compared to traditional methods. This approach also results in a reduction of the total cost by ¥2.87 million. Moreover, the integration of communication base station power supply modifications and participation in market trading further enhances system flexibility, increasing it by an additional 10,563 MW.

Keywords: Flexibility enhancement; Communication base station; Flexibility quota; Transmission blockage; Optimal configuration (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:313:y:2024:i:c:s036054422403651x

DOI: 10.1016/j.energy.2024.133873

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