Jizhong Energy Fengfeng Group Co., Ltd. was formed by restructuring the former Fengfeng Mining Bureau. Fengfeng Mining Bureau was established in September 1949 and restructured into a limited company in July 2003. On ...Jizhong Energy Fengfeng Group Co., Ltd. was formed by restructuring the former Fengfeng Mining Bureau. Fengfeng Mining Bureau was established in September 1949 and restructured into a limited company in July 2003. On June 30, 2008, Jizhong Energy Co., Ltd. was established through joint reorganization with Jinneng Group. Fengfeng Groups coal products are mainly high-quality coking coal, fat coal and thermal coal. In particular, the leading product-coking clean coal is a national protective scarce coal, which has the characteristics of low ash, low sulfur, low phosphorus, moderate volatile matter and strong cohesiveness, and is known as "industrial clean powder". The hydrogeologic conditions in Fengfeng Mining are complex, and the concealed water-conducting structures such as water-conducting collapse columns, faults and fissures are distributed in a concealed and isolated vertical dot shape with no regularity. The prediction and advance prevention of concealed water-conducting structures before mining are limited, and mine mining is seriously threatened by water disasters. Fengfeng Group pioneered the regional water control technology in coal mines. The regional control technology is a new water control technology developed in advance for large mining depth, high water pressure on coal floor, easy water inrush after coal mining, and before coal mining. Since this work was carried out in Jiulong Mine in 2012, it has achieved good results in water disaster control, fundamentally solved the water disaster problem in coal mines and ensured mine safety production.展开更多
The increasing integration of electricity,gas,and hydrogen systems,spurred by blending green hydrogen into existing natural gas pipelines,is paving the way for a future dominated by renewable energy.However,the integr...The increasing integration of electricity,gas,and hydrogen systems,spurred by blending green hydrogen into existing natural gas pipelines,is paving the way for a future dominated by renewable energy.However,the integration poses significant challenges for efficient,safe operation across varying hydrogen penetration levels.This paper conducts a systematic review of the literature on hydrogen-blended integrated gaselectricity systems with a focus on modeling,optimization,and control technologies.First,key technologies and international demonstration projects are introduced to provide a comprehensive overview of the current state and development trends in HIGES.Then,numerical modeling and solution methods are summarized,along with their application scenarios,thereby serving as a theoretical foundation for quantitative research.Next,optimization under normal operating conditions for the multi-entity integrated system is reviewed,with explorations into enhancing economic and effective operation through scheduling,planning,and market mechanisms.Research advances in security analysis and control technologies for fault-state scenarios are reviewed to address the complex operating characteristics.Finally,four pivotal research directions are highlighted.展开更多
文摘Jizhong Energy Fengfeng Group Co., Ltd. was formed by restructuring the former Fengfeng Mining Bureau. Fengfeng Mining Bureau was established in September 1949 and restructured into a limited company in July 2003. On June 30, 2008, Jizhong Energy Co., Ltd. was established through joint reorganization with Jinneng Group. Fengfeng Groups coal products are mainly high-quality coking coal, fat coal and thermal coal. In particular, the leading product-coking clean coal is a national protective scarce coal, which has the characteristics of low ash, low sulfur, low phosphorus, moderate volatile matter and strong cohesiveness, and is known as "industrial clean powder". The hydrogeologic conditions in Fengfeng Mining are complex, and the concealed water-conducting structures such as water-conducting collapse columns, faults and fissures are distributed in a concealed and isolated vertical dot shape with no regularity. The prediction and advance prevention of concealed water-conducting structures before mining are limited, and mine mining is seriously threatened by water disasters. Fengfeng Group pioneered the regional water control technology in coal mines. The regional control technology is a new water control technology developed in advance for large mining depth, high water pressure on coal floor, easy water inrush after coal mining, and before coal mining. Since this work was carried out in Jiulong Mine in 2012, it has achieved good results in water disaster control, fundamentally solved the water disaster problem in coal mines and ensured mine safety production.
基金supported by National Natural Science Foundation of China(52177089).
文摘The increasing integration of electricity,gas,and hydrogen systems,spurred by blending green hydrogen into existing natural gas pipelines,is paving the way for a future dominated by renewable energy.However,the integration poses significant challenges for efficient,safe operation across varying hydrogen penetration levels.This paper conducts a systematic review of the literature on hydrogen-blended integrated gaselectricity systems with a focus on modeling,optimization,and control technologies.First,key technologies and international demonstration projects are introduced to provide a comprehensive overview of the current state and development trends in HIGES.Then,numerical modeling and solution methods are summarized,along with their application scenarios,thereby serving as a theoretical foundation for quantitative research.Next,optimization under normal operating conditions for the multi-entity integrated system is reviewed,with explorations into enhancing economic and effective operation through scheduling,planning,and market mechanisms.Research advances in security analysis and control technologies for fault-state scenarios are reviewed to address the complex operating characteristics.Finally,four pivotal research directions are highlighted.
