Annual Operation Mode Study of Integrated Energy System Considering Seasonal Natural Gas Storage

doi:10.11930/j.issn.1004-9649.202103031

Abstract

Abstract: For the evaluation of the adequacy and security of energy supply in the integrated energy system with increasing electricity and gas coupling, it is necessary to simulate its annual operation mode. A multiple time scale simulation method for annual energy production of the integrated energy system is proposed to optimize the annual operation mode of the electricity and gas coupling system. Seasonal fluctuation factors such as natural gas storage are also considered in this method. The proposed method is validated in a designed system with increasing consumption of natural gas due to clean energy heating, and the impact of large-scale seasonal natural gas storage on the annual operation mode of the integrated energy system is analyzed. Furthermore, the influence of the increasing installed capacity of the combined cooling, heating, and power (CCHP, also known as tri-generation) unit on the coupling system is presented. The results indicate that the CCHP unit can reduce the working intensity of the seasonal natural gas storage unit, namely, the reduction of operation time and storage capacity. The main reason for this effect is that the refrigeration mode of CCHP is more efficient than that of electric refrigeration, which curtails the consumption of natural gas.

Key words: electricity and gas coupling, integrated energy system, annual energy production simulation, natural gas storage, clean energy heating, combined cooling, heating, and power

LIU Hechuan, ZHOU Xiaoxin, YANG Xiaoyu, LI Yalou, LI Xiong. Annual Operation Mode Study of Integrated Energy System Considering Seasonal Natural Gas Storage[J]. Electric Power, 2022, 55(4): 145-155.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202103031

https://www.electricpower.com.cn/EN/Y2022/V55/I4/145

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