Risk assessment of zero-carbon hydrogen energy storage systems coupled with renewable energy power generation systems

Abstract

At present, the world's energy is shifting towards completely sustainable development, and hydrogen energy has attracted much attention because of its abundant reserves, clean and low-carbon. Hydrogen energy storage systems coupled with renewable energy have become a research hotspot in this field. Still, they face investment and construction problems, which affect the process of achieving full sustainable development. Traditional, single-risk assessment models are no longer applicable in this field, especially for the conversion of RE to electrical energy and then to hydrogen energy. Therefore, we establish a new risk evaluation index system for hydrogen energy storage systems considering RE, consider the ambiguity and uncertainty of information, as well as the risk attitude of decision-makers in the evaluation process, and establish a new evaluation model. The model is optimized and reliable by sensitivity analysis and comparison analysis. Example analysis shows that the overall risk is 0.4868, which is a moderate risk, and the key risks include hydrogen embrittlement, RE resources, cell efficiency and durability, and system reliability risks. Management decision-makers can then take preventive measures to ensure the stable operation of the hydrogen energy storage system.