Partitional decoupling method for fast calculation of energy flow in a large-scale heat and electricity integrated energy system

Zhang, Suhan, Gu, Wei, Yao, Shuai ORCID: https://orcid.org/0000-0002-7202-7961, Lu, Shuai, Zhou, Suyang and Wu, Zhi 2020. Partitional decoupling method for fast calculation of energy flow in a large-scale heat and electricity integrated energy system. IEEE Transactions on Sustainable Energy 12 (1) , pp. 501-513. 10.1109/TSTE.2020.3008189

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Abstract

Wide development of the heat and electricity integrated energy system (HE-IES) has provided flexible multi-energy optimization management, which improves energy efficiency and benefits the environment. It is essential to calculate energy flow quickly, accurately, and reliably as the system scale and complexity increase. To handle this problem, we propose a partitional decoupling method based on a decomposed energy flow model for the large-scale HE-IES. The computation mechanisms are presented considering various system scales and topologies, which consist of decoupling mode to solve the non-convergence caused by hydraulic initialization and the iteration mode to correct the variables at common nodes of decoupled systems. Moreover, a unit conversion method is introduced to solve the non-convergence problem in energy flow calculation under extreme scenarios. Case studies show that the proposed method provides accurate energy flow calculations with higher efficiency regardless of system scale and topology, especially in looped systems. Numerical simulation further verifies the effectiveness of the proposed method for non-convergence.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Institute of Electrical and Electronics Engineers
ISSN:	1949-3029
Date of Acceptance:	6 July 2020
Last Modified:	28 Sep 2023 16:15
URI:	https://orca.cardiff.ac.uk/id/eprint/161950

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