Two-level energy management strategy for PV-Fuel cell-battery-based DC microgrid |
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| Affiliation: | 1. School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China;2. School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane 4072, Australia;3. Electric Power Research Institute of State Grid Sichuan Electric Power Company, Chengdu 610000, China;1. Key Laboratory of Eco-chemical Engineering, Ministry of Education, Laboratory of Inorganic Synthesis and Applied Chemistry, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China;2. College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, China;1. School of Electrical Engineering, Southwest Jiaotong University, Chengdu, 610031, Sichuan, China;2. National Rail Transportation Electrification and Automation Engineering Technology Research Center, Southwest Jiaotong University, Chengdu 610031, Sichuan, China;1. School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan Province, China;2. Tangshan Railway Vehicle Co. Ltd, Tangshan 063000, Hebei Province, China;1. Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam;2. Computer Science Department, College of Computer and Information Sciences, Al Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia;3. Computer Science Department, Faculty of Applied Science, Taiz University, Taiz, Yemen;4. MBA School, Henan University of Economics and Law, Zhengzhou, China;5. Political Science Association of Kasetsart University, Bangkok, Thailand |
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| Abstract: | With the fast development of DC Microgrid (MG) technology, its operating economy and reliability are getting more and more concern. The traditional distributed control method is aimed at power balance and system stability, and is difficult to meet the requirement of energy management system for multi-source hybrid DC MG. This paper provides a two-level energy management strategy for PV-fuel cell-battery-based DC MG, which is divided into device control level and system control level. At the device control level, the distributed control methods based on MPPT-droop dual-mode control and droop control are proposed to enhance system reliability; at the system control level, the equivalent consumption minimization strategy (ECMS) is used to distribute system net power between battery pack and fuel cell system. A lab-scale DC microgrid platform is developed to verify the proposed energy management strategy in this paper. Moreover, the analysis and compare of the results show that the proposed two-level energy management strategy can achieve lower equivalent hydrogen consumption than classical PI control and state machine control method. |
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| Keywords: | DC microgrid Energy management strategy Equivalent hydrogen consumption minimum strategy MPPT-droop dual-mode control droop control |
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