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Steady-State Power Flow Analysis of Cold-Thermal-Electric Integrated Energy System Based on Unified Power Flow Model

Author

Listed:
  • Lu Qu

    (Department of Electrical Engineer, Tsinghua University, Beijing 100084, China
    Tsinghua-Towngas Joint Research Center for Regional Comprehensive Energy Planning Technology, Beijing 100084, China)

  • Bin Ouyang

    (Department of Electrical Engineer, Tsinghua University, Beijing 100084, China
    Electric Power Engineering, Shanghai University of Electric Power, Shanghai 200090, China)

  • Zhichang Yuan

    (Department of Electrical Engineer, Tsinghua University, Beijing 100084, China)

  • Rong Zeng

    (Department of Electrical Engineer, Tsinghua University, Beijing 100084, China)

Abstract

The integrated energy system includes various energy forms, complex operation modes and tight coupling links, which bring challenges to its steady-state modeling and steady-state power flow calculation. In order to study the steady-state characteristics of the integrated energy system, the topological structure of the cold-thermal-electric integrated energy system is given firstly. Then, the steady-state model of the power subsystem, the thermal subsystem, the cold subsystem and the distributed energy station are established, the unified power flow model is established, and the Newton Raphson algorithm is used to solve the unified power flow model. Finally, the influence of the key technical parameters on the steady-state power flow of the integrated energy system is analyzed. Research results show that the photovoltaic power generation plays a supporting role in the voltage of each bus; with the increase of electric load power, the unit value of bus voltage decreases continuously; the water supply temperature of the source node has a greater impact on the steady-state flow in the pipeline and the water supply temperature of each node; the pipeline length of the heat network has a greater impact on the end temperature of the pipeline, the water supply temperature, and the return water temperature of each node. The analysis results can support the planning, design, and optimal operation of the integrated energy system.

Suggested Citation

  • Lu Qu & Bin Ouyang & Zhichang Yuan & Rong Zeng, 2019. "Steady-State Power Flow Analysis of Cold-Thermal-Electric Integrated Energy System Based on Unified Power Flow Model," Energies, MDPI, vol. 12(23), pages 1-16, November.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:23:p:4455-:d:289976
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    References listed on IDEAS

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    1. Tengfei Ma & Junyong Wu & Liangliang Hao & Huaguang Yan & Dezhi Li, 2018. "A Real-Time Pricing Scheme for Energy Management in Integrated Energy Systems: A Stackelberg Game Approach," Energies, MDPI, vol. 11(10), pages 1-19, October.
    2. Pan, Zhaoguang & Guo, Qinglai & Sun, Hongbin, 2016. "Interactions of district electricity and heating systems considering time-scale characteristics based on quasi-steady multi-energy flow," Applied Energy, Elsevier, vol. 167(C), pages 230-243.
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    Cited by:

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