A maximum power point tracking control strategy with variable weather parameters for photovoltaic systems with DC bus |
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| Affiliation: | 1. Science and Technology College, and School of Information Engineering, Hubei University for Nationalities, Enshi, China;2. Intelligent Control & Electrical Power Systems Laboratory, Djillali Liabes University of Sidi Bel-Abbes, Sidi Bel-Abbes, Algeria;1. School of Biological, Earth and Environmental Sciences, University of New South Wales, Kensington, Sydney, NSW 2052, Australia;2. Australian Centre for Astrobiology, University of New South Wales, Kensington, Sydney, NSW 2052, Australia;3. Department of Geology, University of Pretoria, Pretoria 0002, South Africa;1. Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, And School of Chemistry and Chemical Engineering, Xuchang University, Henan 461000, PR China;2. Quality and Technique Supervision, Inspection and Testing Center of Xuchang City, Henan 461000, PR China;3. National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, PR China;1. Department of Electrical and Electronics Engineering, SET, Sharda University, India;2. Department of Physics, SBSR, Sharda University, India;1. Biological and Environmental Engineering Department, Cornell University, Ithaca, NY, USA;2. Biosystems Engineering Department, Ferdowsi University of Mashhad, Mashhad, Iran |
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| Abstract: | In photovoltaic (PV) system, the most commonly used DC/DC converter is the basic buck or boost circuit to implement the maximum point power tracking (MPPT) due to their simple structure and low cost while there are some MPPT constraint conditions. By contrast, the conventional buck/boost DC/DC converter without MPPT constraint condition is seldom used because of its high cost or poor performance. To keep the advantages of these three DC/DC converters while overcoming their shortcomings, in this paper, the constraint conditions of capturing the maximum power point (MPP) of PV systems with direct-current (DC) bus are found out. Then, on the basis of this work, a MPPT control strategy with variable weather parameters is proposed. In this strategy, a new buck/boost DC/DC converter is proposed, which not only avoids the MPPT constraint conditions of basic buck or boost DC/DC converter but also overcomes the shortcomings of conventional buck/boost DC/DC converter. Finally, lots of simulated experiments verify the accuracy of MPPT constraint conditions, test the feasibility and availability of proposed MPPT control strategy, analyze the MPPT performance of proposed PV system and compare the output transient-state performance with conventional perturb and observe (P&O) method. |
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| Keywords: | PV system MPPT DC bus Constraint condition DC/DC converter |
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