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Optimal Allocation of Thermal-Electric Decoupling Systems Based on the National Economy by an Improved Conjugate Gradient Method

Author

Listed:
  • Shuang Rong

    (Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Weixing Li

    (Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Zhimin Li

    (Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Yong Sun

    (State Grid Jilinsheng Electric Power Supply Company, Changchun 130021, China)

  • Taiyi Zheng

    (State Grid Jilinsheng Electric Power Supply Company, Changchun 130021, China)

Abstract

Aiming to relieve the large amount of wind power curtailment during the heating period in the North China region, a thermal-electric decoupling (TED) approach is proposed to both bring down the constraint of forced power output of combined heat and power plants and increase the electric load level during valley load times that assist the power grid in consuming more wind power. The operating principles of the thermal-electric decoupling approach is described, the mathematical model of its profits is developed, the constraint conditions of its operation are listed, also, an improved parallel conjugate gradient is utilized to bypass the saddle problem and accelerate the optimal speed. Numerical simulations are implemented and reveal an optimal allocation of TED which with a rated power of 280 MW and 185 MWh heat storage capacity are possible. This allocation of TED could bring approximately 16.9 billion Yuan of economic profit and consume more than 80% of the surplus wind energy which would be curtailed without the participation of TED. The results in this article verify the effectiveness of this method that could provide a referential guidance for thermal-electric decoupling system allocation in practice.

Suggested Citation

  • Shuang Rong & Weixing Li & Zhimin Li & Yong Sun & Taiyi Zheng, 2015. "Optimal Allocation of Thermal-Electric Decoupling Systems Based on the National Economy by an Improved Conjugate Gradient Method," Energies, MDPI, vol. 9(1), pages 1-21, December.
    • Handle: RePEc:gam:jeners:v:9:y:2015:i:1:p:17-:d:61417
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    References listed on IDEAS

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    1. Shuang Rong & Zhimin Li & Weixing Li, 2015. "Investigation of the Promotion of Wind Power Consumption Using the Thermal-Electric Decoupling Techniques," Energies, MDPI, vol. 8(8), pages 1-17, August.
    2. Ibrahim, H. & Ilinca, A. & Perron, J., 2008. "Energy storage systems--Characteristics and comparisons," Renewable and Sustainable Energy Reviews, Elsevier, vol. 12(5), pages 1221-1250, June.
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    Cited by:

    1. Yaokui Gao & Yong Hu & Deliang Zeng & Jizhen Liu & Feng Chen, 2018. "Modeling and Control of a Combined Heat and Power Unit with Two-Stage Bypass," Energies, MDPI, vol. 11(6), pages 1-20, May.

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