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Combined heat and power control considering thermal inertia of district heating network for flexible electric power regulation

Author

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  • Wang, Wei
  • Jing, Sitong
  • Sun, Yang
  • Liu, Jizhen
  • Niu, Yuguang
  • Zeng, Deliang
  • Cui, Can

Abstract

The capability to perform rapid load changes is an important issue due to its considerable support on power system stability, and its improvement is increasingly becoming urgent due to large-scale integration of fluctuant wind energies. An optimized control strategy for improving the load-following capability of combined heat and power (CHP) units is therefore developed. The strategy aims to borrow the heat extraction output to perform fast load changes given that its influence in tens of minutes on heat consumers is slight owing to the large inertia of district heating networks (DHNs). The static and dynamic models of heat–power conversion are set up. Dual control strategy is adopted to combine heat source regulation (HSR) and traditional boiler–turbine coordinated control strategy, among which HSR is taken as the primary control of power load for rapid load response and fuel control as secondary control for the final load accuracy. Finally, field tests on a 330 MW CHP unit reveal that the maximum allowable ramp rate can be raised to 4% of rated power per minute and meanwhile it almost takes no impact on heat consumers.

Suggested Citation

  • Wang, Wei & Jing, Sitong & Sun, Yang & Liu, Jizhen & Niu, Yuguang & Zeng, Deliang & Cui, Can, 2019. "Combined heat and power control considering thermal inertia of district heating network for flexible electric power regulation," Energy, Elsevier, vol. 169(C), pages 988-999.
    • Handle: RePEc:eee:energy:v:169:y:2019:i:c:p:988-999
    DOI: 10.1016/j.energy.2018.12.085
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    13. Wang, Di & Liu, Deying & Wang, Chaonan & Zhou, Yunlong & Li, Xiaoli & Yang, Mei, 2022. "Flexibility improvement method of coal-fired thermal power plant based on the multi-scale utilization of steam turbine energy storage," Energy, Elsevier, vol. 239(PD).
    14. Wang, Qi & Miao, Cairan & Tang, Yi, 2022. "Power shortage support strategies considering unified gas-thermal inertia in an integrated energy system," Applied Energy, Elsevier, vol. 328(C).
    15. Gao, Shuang & Jurasz, Jakub & Li, Hailong & Corsetti, Edoardo & Yan, Jinyue, 2022. "Potential benefits from participating in day-ahead and regulation markets for CHPs," Applied Energy, Elsevier, vol. 306(PA).
    16. Wang, Congyu & Song, Jiwei, 2023. "Performance assessment of the novel coal-fired combined heat and power plant integrating with flexibility renovations," Energy, Elsevier, vol. 263(PC).
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    18. Golmohamadi, Hessam & Larsen, Kim Guldstrand & Jensen, Peter Gjøl & Hasrat, Imran Riaz, 2022. "Integration of flexibility potentials of district heating systems into electricity markets: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 159(C).
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    20. Yu, Haiquan & Zhou, Jianxin & Si, Fengqi & Nord, Lars O., 2022. "Combined heat and power dynamic economic dispatch considering field operational characteristics of natural gas combined cycle plants," Energy, Elsevier, vol. 244(PA).
    21. Zheng, Jinfu & Zhou, Zhigang & Zhao, Jianing & Hu, Songtao & Wang, Jinda, 2021. "Effects of intermittent heating on an integrated heat and power dispatch system for wind power integration and corresponding operation regulation," Applied Energy, Elsevier, vol. 287(C).
    22. Kong, Xiangyu & Sun, Fangyuan & Huo, Xianxu & Li, Xue & Shen, Yu, 2020. "Hierarchical optimal scheduling method of heat-electricity integrated energy system based on Power Internet of Things," Energy, Elsevier, vol. 210(C).
    23. Chen, Dongwen & Li, Yong & Abbas, Zulkarnain & Li, Dehong & Wang, Ruzhu, 2022. "Network flow calculation based on the directional nodal potential method for meshed heating networks," Energy, Elsevier, vol. 243(C).

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