Flexible dispatch strategy of purchasing-selling electricity for coal-fired power plant based on compressed air energy storage

Tiancheng Ouyang, Peijia Qin, Shutao Xie, Xianlin Tan and Mingming Pan

Energy, 2023, vol. 267, issue C

Abstract: With the significant increase in social electricity consumption, the volatility and uncertainty of the electricity load have a significant influence on the operation of the coal-fired power plant. To address this issue, a novel compressed air energy storage system integrated into a coal-fired power plant is proposed to realize that excess electricity is stored at off-peak time and discharged to the customers at peak time to increase the profit. The double parameters regulation method is adopted to broaden the operating ranges of the compressor and expander. Additionally, the relationship between charging and discharging cycles and the system performance is obtained by analyzing the dynamic characteristics of the packed bed. The simulation results indicate that the operating ranges of the compressor and expander are increased to 63.1–121.6 MW and 12.3–53.7 MW, respectively. Furthermore, the round-trip efficiency and total heat storage capacity of the packed bed gradually stabilized at 54.3% and 650 MWh as the number of cycles increased. The economic analysis shows that the levelized cost of electricity and dynamic payback period of the system are 92.35 USD/MWh and 8.4 years. Finally, compared with previous literature by fuzzy evaluation, the proposed system obtains the optimal membership degree of 0.99.

Keywords: Coal-fired power plant; Compressed air energy storage; Double parameters regulation; Economic dispatch; Fuzzy evaluation (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (9)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:267:y:2023:i:c:s036054422203465x

DOI: 10.1016/j.energy.2022.126578

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