Multi-area combined heat and power coordinated operation considering the heat storage of buildings

Author(s): Haixia Wanga,*, Yutong Hana, Quan Lva, Yang Lv b
Dalian University of Technology, Department of Electrical Engineering, 116024 No.2 Linggong Road, Ganjingzi District, Dalian City, Liaoning Province, China
Huaneng Dalian Power Plant, 116100 Dalian Bay Town, Dalian City, Liaoning Province, China
International Journal of Smart Grid and Clean Energy, vol. 9, no. 2, March 2020: pp. 397-410
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.9.2.397-410

Abstract: During the winter heating period in the northern area of China, the traditional operation mode that heating supply determines the electricity generation leads to the limitation of regulation ability of the combined heat and power (CHP) units, resulting in a large number of wind power curtailment. This paper decouples the strong coupling between electric power and heating supply of CHP units by considering the heat storage of buildings, and extends it to coordinated dispatching of multi-area connected by tie lines. Taking the lowest cost of power generations as the objective, an optimization model of CHP coordinated operation considering the heat storage of buildings is established. On this basis, a model of the multi-area CHP coordinated operation is established considering the tie-line constraints. The results of the example show that, the regulation range of the CHP units increases and the peakshaving ability of the system enhances after considering the thermal storage of the building. When applying the thermal storage of the building to the coordinated operation of multi-area CHP system, it can achieve a wider range of coordination of electricity and heat, and fully excavate the flexibility of CHP system, and provide more space for wind power access to power grid.

Keywords: Heat storage of buildings, combine heat and power, tie line, multi-area interconnection, wind power consumption
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