Generalized frequency-domain analysis for dynamic simulation and comprehensive regulation of integrated electric and heating system

IF 10.1 1区工程技术 Q1 ENERGY & FUELS Applied Energy Pub Date : 2024-07-09 DOI:10.1016/j.apenergy.2024.123817

Qinghan Sun , Runhang Teng , Hang Li , Yonglin Xin , Huan Ma , Tian Zhao , Qun Chen

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Abstract

Comprehensive dispatch of integrated electric and heating systems (IEHS) has shown great potential in promoting energy utilization efficiency, where an effective modelling of district heating system (DHS) is crucial. Herein, a new frequency-domain-based model is proposed to reflect full heat transport dynamics in DHS considering variation of both temperatures and fluid flow rates. Numerical tests on a highly branched DHS demonstrate the high accuracy of the proposed model under various flow conditions. The proposed model has a general error less than 1K and outperforms the popular node method and finite difference method with less temporal sampling points. A primal-decomposition-based rolling-horizon approach is also proposed to optimize the IEHS in variable flow and variable temperature (VF-VT) mode using the new physical model. The results on a 45-node IEHS show the effectiveness of the proposed model and optimization approach, where the total operation cost is reduced by 3.4% compared with optimization without regulation of flow rates.

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用于综合电力和供热系统动态模拟和综合调节的广义频域分析

综合电力和供热系统（IEHS）的综合调度在提高能源利用效率方面显示出巨大潜力，而区域供热系统（DHS）的有效建模至关重要。本文提出了一种新的基于频域的模型，以全面反映区域供热系统中的热传输动态，同时考虑温度和流体流速的变化。在一个高度分支的 DHS 上进行的数值测试表明，所提出的模型在各种流动条件下都具有很高的准确性。所提模型的一般误差小于 1K，优于常用的节点法和时间采样点较少的有限差分法。此外，还提出了一种基于基元分解的滚动地平线方法，利用新的物理模型优化变流变温（VF-VT）模式下的 IEHS。在 45 个节点的 IEHS 上得出的结果表明，所提出的模型和优化方法非常有效，与不调节流量的优化方法相比，总运行成本降低了 3.4%。

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来源期刊

Applied Energy 工程技术-工程：化工

CiteScore

21.20

自引率

10.70%

发文量

1830

审稿时长

41 days

期刊介绍： Applied Energy serves as a platform for sharing innovations, research, development, and demonstrations in energy conversion, conservation, and sustainable energy systems. The journal covers topics such as optimal energy resource use, environmental pollutant mitigation, and energy process analysis. It welcomes original papers, review articles, technical notes, and letters to the editor. Authors are encouraged to submit manuscripts that bridge the gap between research, development, and implementation. The journal addresses a wide spectrum of topics, including fossil and renewable energy technologies, energy economics, and environmental impacts. Applied Energy also explores modeling and forecasting, conservation strategies, and the social and economic implications of energy policies, including climate change mitigation. It is complemented by the open-access journal Advances in Applied Energy.