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Open AccessArticle

Modeling of a District Heating System and Optimal Heat-Power Flow

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School of Electrical Engineering, Zhejiang University, No. 38 Zheda Rd., Hangzhou 310027, China
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Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam
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Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam
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Guangzhou Power Supply Company Limited, Guangzhou 510620, China
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Department of Electrical and Electronic Engineering, Universiti Teknologi Brunei, Bandar Seri Begawan BE1410, Brunei
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Author to whom correspondence should be addressed.
Energies 2018, 11(4), 929; https://doi.org/10.3390/en11040929
Received: 8 February 2018 / Revised: 17 March 2018 / Accepted: 10 April 2018 / Published: 13 April 2018
With ever-growing interconnections of various kinds of energy sources, the coupling between a power distribution system (PDS) and a district heating system (DHS) has been progressively intensified. Thus, it is becoming more and more important to take the PDS and the DHS as a whole in energy flow analysis. Given this background, a steady state model of DHS is first presented with hydraulic and thermal sub-models included. Structurally, the presented DHS model is composed of three major parts, i.e., the straight pipe, four kinds of local pipes, and the radiator. The impacts of pipeline parameters and the environment temperature on heat losses and pressure losses are then examined. The term “heat-power flow” is next defined, and the optimal heat-power flow (OHPF) model formulated as a quadratic planning problem, in which the objective is to minimize energy losses, including the heat losses and active power losses, and both the operational constraints of PDS and DHS are respected. The developed OHPF model is solved by the well-established IPOPT (Interior Point OPTimizer) commercial solver, which is based on the YALMIP/MATLAB toolbox. Finally, two sample systems are served for demonstrating the characteristics of the proposed models. View Full-Text
Keywords: power distribution system (PDS); district heating system (DHS); steady state model; optimal heat-power flow (OHPF) model power distribution system (PDS); district heating system (DHS); steady state model; optimal heat-power flow (OHPF) model
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Yang, W.; Wen, F.; Wang, K.; Huang, Y.; Salam, M.A. Modeling of a District Heating System and Optimal Heat-Power Flow. Energies 2018, 11, 929.

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