Seasonal hydrogen energy storage sizing: Two-stage economic-safety optimization for integrated energy systems in northwest China

作者：Luoyi Li, Yi Sun, Ying Han, Weirong Chen · 发表于：iScience · 年份：2024 · DOI：10.1016/j.isci.2024.110691 · 被引用次数：60 · 研究领域：Hybrid Renewable Energy Systems、Integrated Energy Systems Optimization、Thermodynamic and Exergetic Analyses of Power and Cooling Systems

The evident seasonal variations in photovoltaic output as well as electric and thermal loads will result in significant energy wastage and carbon emissions. In order to address the problem, a two-stage sizing cooptimization method considering economy-safety characteristics is proposed for the integrated energy system combined power-hydrogen-heat cogeneration (CPHH-IES), with seasonal hydrogen storage. Subsequently, an economic-durability-safety optimized objective is introduced, assessing the total cost throughout the sizing cycle, equipment degradation during operation, and safety indicators of the hydrogen energy system. Finally, a two-stage sizing framework based on heat-determined hydrogen is established, and a combined configuration-scheduling double-layer strategy is put forward within the framework to accommodate seasonal hydrogen storage and multi-energy coupling. The feasibility of the method was validated using data from a site in northwest China, demonstrating its capacity to ensure the safety of the hydrogen energy system and enable seasonal hydrogen storage.