Optimal dispatch of HCNG penetrated integrated energy system based on modelling of HCNG process |
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| Affiliation: | 1. College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China;2. Fujian Smart Electrical Engineering Technology Research Center, Fuzhou University, Fuzhou 350108, China;1. Ufa State Petroleum Technological University, Ufa, 450064, Russia;2. Department of Petroleum Engineering, Shahid Bahonar University of Kerman, Kerman, Iran;3. Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran;4. College of Engineering and Technology, American University of the Middle East, Kuwait;5. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing, China;6. Department of Chemical Engineering, McGill University, Montreal, QC H3A 0C5, Canada;1. Department of Chemical Engineering, Shaanxi Key Laboratory of Energy Chemical Process Intensification, Engineering Research Center of New Energy System Engineering and Equipment, Xi''an Jiaotong University, Xi''an, 710049, China;2. State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan, 030000, China;1. Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang, 621907, PR China;2. Institute of Materials, China Academy of Engineering Physics, Mianyang, 621900, China |
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| Abstract: | Hydrogen is injected into the existing natural gas network to form hydrogen-rich compressed natural gas (HCNG), effectively addressing the high cost of hydrogen transmission. However, the traditional IES model cannot be used due to the hydrogen injection's effect on gas properties and the vague characteristics of the transport and separation processes. Therefore, this paper proposes an HCNG penetrated integrated energy system (HPIES) optimal dispatching method by comprehensively modelling the injection, transmission, and separation processes of HCNG. An HCNG mass flow rate model considering variable mixing ratio and unknown beginning flow direction is developed to describe the effect of hydrogen injection. Furthermore, the hydrogen separation model is established by introducing a combined membrane and pressure swing adsorption separation process. The tightening McCormick algorithm is proposed to solve quickly HPIES optimal dispatch problem with an acceptable feasibility check. Finally, case studies on the HPIES consisting of IEEE 39-bus power system and 20-node natural gas system validate the effectiveness of the algorithm and model. The results show that the average error is 0.031% for the bilinear term constraint. |
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| Keywords: | Hydrogen enriched compressed natural gas (HCNG) Integrated energy system Hydrogen separation Hydrogen injection Convex relaxation |
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