摘要
随着双碳目标的推进,电网对于调峰调频需求快速增加。为充分发挥压缩空气储能(compressed air energy storage,CAES)重要作用,该文提出一种与火电耦合的压缩空气储能多能联供系统,基于所构建的热力分析及经济性分析模型,对其热力性能和技术经济性进行评估,在此基础上重点分析关键参数对经济性指标的影响规律,从而为未来的工程应用提供参考。结果表明,典型工况下新系统效率可提升16.21%,单次循环可节煤5.39t。此外,系统的动态投资回报期可缩短11.8年,内部收益率能够提升5.72%,说明与火电集成后的CAES系统在热经济性及技术经济性方面均有显著提升。参数敏感性研究发现,系统的技术经济性受年循环次数以及调峰补贴区间影响较大,当年循环次数少于190次、调峰补贴边界低于35.5%负荷率或度电补贴金额小于0.14元时将不具备可投资性。研究结果可为CAES大规模商业推广应用提供新的发展思路,并为投资者提供一定参考及依据。
With the promotion of the carbon peak and carbon neutrality goals,the demand for peak shaving and frequency modulation in the grid is rapidly increasing.To better play the role of compressed air energy storage(CAES),this paper proposes a trigenerative CAES system coupled with a thermal power plant.Based on the established thermodynamic models and the techno-economic analysis models,the system thermal performance as well as economics performance are evaluated,and the influences of key parameters on the economic indicators are analyzed to provide guidance for future practical engineering application.The results show that the new system efficiency is enhanced by 16.21%and 5.39 tons of coal are saved for one cycle under a typical condition.Besides,the dynamic payback period is shortened by 11.8 years,and the internal rate of return is increased by 5.72%.These results demonstrate that the proposed new CAES system has better performance in both thermo-economy and techno-economy.The parametric sensitivity study indicates that the system is greatly affected by the number of annual cycles and the peak shaving subsidy range.When the number of annual cycles is less than 190,the peak shaving subsidy boundary is less than 35.5%load rate or the electricity subsidy is less than 0.14yuan/kW·h,the coupling system will not be investable.This study provides a new development idea for the large-scale commercial promotion and application of CAES,and also provide reference and basis for investors.
作者
李佳佳
李兴朔
魏凡超
颜培刚
刘金福
于达仁
LI Jiajia;LI Xingshuo;WEI Fanchao;YAN Peigang;LIU Jinfu;YU Daren(School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,Heilongjiang Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2023年第23期9171-9182,共12页
Proceedings of the CSEE
关键词
压缩空气储能
火电机组
热力循环
技术经济性
投资边界分析
compressed air energy storage
thermal power unit
thermal cycle
techno-economy
investment boundary analysis
