An optimized design of residential integrated energy system considering the power-to-gas technology with multi-functional characteristics. (1st January 2022)

• Record Type: Journal Article
• Authors: Zhang, Dongdong; Zhu, Hongyu; Zhang, Hongcai; Goh, Hui Hwang; Liu, Hui; Wu, Thomas
• Is Part Of: Energy. Volume 238:Part A(2022)
• Publication Date: 2022-01-01
• Subjects: Power-to-gas technology -- Regional integrated energy system -- Renewable energy source -- Energy conversion -- Energy storage -- Hydrogen energy; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2021.121774
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: In order to realize the large-scale and normal implementation of power-to-gas technology, as well as the large-capacity storage and long-distance transportation of gas in the later stage of electric hydrogen production, a power-to-gas technology with real-time energy conversion characteristics and large-scale energy storage characteristics is studied in this paper. Firstly, the water-electricity-gas coupling process between the electrolytic cell and the methanation reactor in the power-to-gas system is discussed in detail, and the model of the power-to-gas system based on the coordination of real-time energy conversion and large-scale energy storage is proposed. Then, based on a multi-energy coupling regional integrated energy system, a highly decoupled multi-step modelling method is adopted to construct its optimal operation model, and the equivalent variable substitution method is used to transform it into a linear programming problem. Finally, the calculation results show that the proposed power-to-gas technology can further improve the energy utilization efficiency due to the complementary characteristics of the two functions, so as to effectively promote the implementation of large-scale power-to-gas projects in the future. Highlights: Propose a power-to-gas technology with different functional characteristics. The proposed method realizes the large-capacity storage and long-distance transmission of energy. Establish a highly decoupled multi-step optimization model of residential integrated energy system. Use variable substitution method to linearize the model. The proposed model reduces system operating costs with efficient energy utilization efficiency.