Model construction and energy management system of lithium battery,PV generator,hydrogen production unit and fuel cell in islanded AC microgrid |
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| Affiliation: | 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;1. College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, China;2. Department of Civil and Environmental Engineering, University of Alberta, Edmonton, T6G 1H9, Canada;1. School of Electrical and Computer Engineering, National Technical University of Athens, Athens, Greece;2. Department of Electronics Engineering, Technological Educational Institute of Piraeus, Aigaleo, Greece;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. School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia (UTM), 81310, UTM Johor Bahru, Johor, Malaysia;2. Process Systems Engineering Centre (PROSPECT), Research Institute of Sustainable Environment (RISE), Universiti Teknologi Malaysia (UTM), 81310, UTM Johor Bahru, Johor, Malaysia;3. Centre of Hydrogen Energy, Institute of Future Energy, Universiti Teknologi Malaysia, 81310, UTM Johor Bahru, Johor, Malaysia;4. UTM-Low Carbon Asia Research Centre, Program of Urban and Regional Planning, Faculty of Built Environment and Surveying, Universiti Teknologi Malaysia (UTM), Malaysia |
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| Abstract: | The external electrical characteristics of the lithium battery, PV generator, hydrogen production unit (HPU) and fuel cell in islanded AC microgrid are well analyzed with mathematic models, based on which an energy management system among the abovementioned elements is proposed by using the bus frequency signaling. Specifically, the functions of lithium battery with the variables of the residual capacity and instantaneous working power are well designed to deliver its operation information to other units. The P-f droop control strategy is designed for the PV generator to make it adaptively work off from the maximum power point to the reference power point. The control strategy of HPU can make it work from the maximum efficiency point mode to the allowable maximum power point mode to absorb PV output power as much as possible when the lithium battery is almost getting full charged. Similarly, the fuel cell controller can regulate its power generation from the maximum efficiency point mode to the maximum power point to supply the local load as much as possible when the lithium battery is almost getting full discharged. Finally, the proposed energy management system is verified based on RTLAB experimental platform to show the effectiveness of the proposed coordination control strategy. |
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| Keywords: | Lithium battery PV generator Hydrogen production unit Fuel cell Model construction Energy management system |
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