Multi-objective optimization of large-scale grid-connected photovoltaic-hydrogen-natural gas integrated energy power station based on carbon emission priority
Multi-objective optimization of large-scale grid-connected photovoltaic-hydrogen-natural gas integrated energy power station based on carbon emission priority
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DOI：
10.1016/j.ijhydene.2022.10.121
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发表时间：
2022-11
影响因子：
7.2
通讯作者：
Yujia Song;H. Mu;Nan Li;Hongye Wang
中科院分区：
文献类型：
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作者：
Yujia Song;H. Mu;Nan Li;Hongye Wang
建立综合能源体系，有利于提高可再生能源利用率，促进脱碳。本研究建立并网光伏-氢-天然气一体化能源系统，探讨一体化能源系统配置对其环境和经济的影响。建立了多目标分层优化分配模型，首次建立了碳排放优于总成本的优化策略。此外，还对系统的经济性、环保性和能源效率进行了分析。采用考虑总成本优于碳排放的策略进行了比较研究。案例分析表明，与比较策略相比，平准化电力成本提高了62.24%，平准化电力碳排放降低了74.19%，能效提高了8.51%。从而大大减少了系统的碳排放，提高了能源效率。虽然采用该策略优化的系统成本较高，但在经济上是可行的。进一步的分析表明，延长并网期是不可行的，因为它可能会增加系统的总成本和碳排放。此外，敏感性分析表明，提高天然气价格或碳税基价不会降低系统的碳排放。
Establishing integrated energy systems is conducive for improving renewable energy utilization and promoting decarbonization. In this study, a grid-connected photovoltaic-hydrogen-natural gas integrated energy system is established to explore the effects of the configuration of the integrated energy system on its environment and economy. A multi-objective hierarchical optimization allocation model is developed, and an optimization strategy with carbon emission superior to total cost is established for the first time. Additionally, the economy, environment, and energy efficiency of the system are analyzed. A comparative study is performed using a strategy considering that the total cost is superior to carbon emission. A case study reveals that the levelized cost of electricity increases by 62.24%, levelized carbon emission of power decreases by 74.19%, and energy efficiency increases by 8.51%, as compared with those of the comparison strategy. Thus, the carbon emission of the system is reduced considerably, and the energy efficiency is improved. Although the cost of the system optimized by the proposed strategy is higher, it is economically feasible. Further analyses indicate that extending the grid-connected period would be infeasible, as it might increase the total cost and carbon emission of the system. Moreover, sensitivity analyses show that increasing the natural gas price or carbon tax base price will not reduce the carbon emission of the system.