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Recently, the Three Gorges Group’s first integrated comprehensive demonstration project for green hydrogen production, storage, transportation, and utilization was successfully commissioned at the Three Gorges Ulanqab Source-Grid-Load-Storage Technology R&D and Testing Base in Inner Mongolia. This project was developed under the leadership of the Science and Research Institute of China Three Gorges Corporation (referred to as the “Research Institute”). It focuses on advancing technologies in the four key areas of hydrogen production, storage, transportation, and refueling, covering all essential stages such as hydrogen production through water electrolysis, various storage and transportation methods, hydrogen fuel cell power generation, and hydrogen refueling. It creates a closed-loop system that integrates green electricity-based hydrogen production, multiple storage and transportation options, and applications in various scenarios, thereby establishing a testing ground for green hydrogen that emphasizes technology validation and innovative business models, thus contributing to the high-quality development of China’s hydrogen industry. Currently, hydrogen energy, as an important pathway for driving the green transition of energy, is receiving a great deal of **attention. Green hydrogen is produced by using renewable energy electricity, such as wind and solar power, to electrolyze water, making it the cleanest method for hydrogen production. Ulanqab City in the Inner Mongolia Autonomous Region, where this demonstration project is located, is one of the regions in China with the richest resources in solar and wind energy. The project aims to integrate the green hydrogen industry chain covering production, storage, transportation, and utilization with the \"source-grid-load-storage\" model designed to address the challenges associated with the consumption of new energy sources, striving to create a new model based on the combination of hydrogen and electricity. “We must not only explore the chemical value of hydrogen but also uncover its energy value. ”According to the researchers on site, “In a full-industry-chain platform, hydrogen can serve both as a ‘carrier’ and as a ‘storage medium’.” Through deep integration with hydrogen storage devices and fuel cells, it is possible to achieve large-scale and long-term stable storage of new energy. This creates a complementary and synergistic relationship with electrochemical energy storage, thereby improving the system for new energy consumption and supply. ” To achieve \"hydrogen-electric coupling,\" the project has made key progress in multiple areas. In the hydrogen production phase, to accurately address the variability of wind and solar resources, the project utilizes proton exchange membrane (PEM) electrolyzers for hydrogen production. System designs have been developed, along with operational demonstrations, for hydrogen production via electrolysis to meet the demands of renewable energy utilization and load management within the industrial park. The system has a response time of seconds, enabling it to effectively cope with the intermittency and variability in the output of renewable energy sources. In the storage and transportation phase, low density, difficulty in storage and transportation, and high costs are the key challenges faced by the industry. The project addresses the needs for large-scale, long-distance storage and transportation by employing a hydrogen storage system with multiple pressure levels. It also includes the construction of cryogenic liquid hydrogen tanks capable of meeting 7 days’ worth of storage requirements, and it explores technical approaches for the simultaneous storage and transportation of high-pressure gaseous hydrogen and liquid hydrogen. During the refueling and application phase, the project took full account of the extremely cold conditions in northern China, and developed a hydrogen refueling test platform capable of operating at temperatures as low as minus 30 degrees Celsius, thereby verifying the reliability of the refueling system under such extreme conditions. The system achieves fully automated control throughout the start-up, operation, and shutdown processes, and can reliably meet the testing requirements of hydrogen refueling stations operating at the two common pressure levels of 35 megapascals and 70 megapascals. Furthermore, the 200 kW/120 hour hydrogen fuel cell combined heat and power storage system installed as part of the project demonstrated the potential of green hydrogen as a zero-carbon energy source. It is reported that, relying on this base, the research institute has been approved for several **-level demonstration projects, which provide important technical support and practical experience for accelerating the development of a new type of power system.