Review on recent optimization strategies for hybrid renewable energy system with hydrogen technologies: State of the art, trends and future directions

The world is currently facing a power shortage due to the inadequacy of conventional energy sources and increased energy requirements in almost all sectors of human life. To mitigate this issue, the researchers have taken the considerable interest of researchers over the past decade in enhancing energy efficiency and viability. A hybrid renewable energy system (HRES) can efficiently produce clean energy to meet energy demand. Thus, it is extensively employed to improve power system quality, reliability, and economy, rather than solely relying on non-renewable energy sources. Nevertheless, RE sources' uncertain and intermittent nature, like wind speed and solar radiation, is associated with HRES. This problem can be solved with proper optimization by coupling HRES with energy conversion and storage devices, e.g., electrolyzer, fuel cell, and hydrogen tank, which can admirably balance power generation and energy demand. The literature is rich in employing opti-mization techniques on HRES with hydrogen technologies (HRES-H-2). However, a gap is found in the overall research progress of optimization approaches, considering HRES coupled with H-2 equipment. Therefore, the current study comprehensively reviews all the optimization approaches applied in this field worldwide. Further, a text mining-based software VOSviewer is used to investigate the scientific landscape of the literature body to figure out the current trends and future scope of HRES-H-2. It has been investigated that the researchers are focusing on: techno-economic optimization of HRES-H-2, developing sophisticated hydrogen infrastructure to reduce the overall cost of hydrogen fuel, intro-ducing AI-based multi-objective optimization techniques to make the HRES-H-2 system more reliable and economically viable, and the impact of renewable and hydrogen technologies on the reduction of global warming. Lastly, an insightful of the current review highlighting the present shortcomings and opportunities of clean energy and hydrogen has been discussed, and suggestions are provided. (C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

The literature review comprehensively examines the optimization approaches applied in the field of hybrid renewable energy system coupled with hydrogen technologies (HRES-H-2). The study reveals trends such as techno-economic optimization, development of sophisticated hydrogen infrastructure, AI-based multi-objective optimization techniques, and the impact of renewable and hydrogen technologies on reducing global warming.