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Full-Soft-Switching High Step-Up Bidirectional Isolated Current-Fed Push-Pull DC-DC Converter for Battery Energy Storage

This paper presents a novel bidirectional current fed push-pull DC-DC converter topology with galvanic isolation. The control algorithm proposed enables full-soft-switching of all transistors in a wide range of input voltage and power with no requirement for snubbers or resonant switching. The converter features an active voltage doubler rectifier controlled by the switching sequence synchronous to that of the input-side switches. As a result, full-soft-switching operation at a fixed switching frequency is achieved. Operation principle for the energy transfer in both directions is described, followed by verification with a 300 W experimental prototype. The converter has considerably higher voltage step-up performance than traditional current-fed converters Experimental results obtained are in good agreement with the theoretical steady-state analysis.

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Full-Soft-Switching High Step-Up Bidirectional Isolated Current-Fed Push-Pull DC-DC Converter for Battery Energy Storage

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  1. ELECTRICAL PROJECTS USING MATLAB/SIMULINK ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 Full-Soft-Switching High Step-Up Bidirectional Isolated Current- Fed Push-Pull DC-DC Converter for Battery Energy Storage Applications ABSTRACT: This paper presents a novel bidirectional current fed push-pull DC-DC converter topology with galvanic isolation. The control algorithm proposed enables full-soft-switching of all transistors in a wide range of input voltage and power with no requirement for snubbers or resonant switching. The converter features an active voltage doubler rectifier controlled by the switching sequence synchronous to that of the input-side switches. As a result, full-soft-switching operation at a fixed switching frequency is achieved. Operation principle for the energy transfer in both directions is described, followed by verification with a 300 W experimental prototype. The converter has considerably higher voltage step-up performance than traditional current-fed converters Experimental results obtained are in good agreement with the theoretical steady-state analysis. KEYWORDS: 1.Current-fed dc-dc converter 2. Bidirectional converter 3.Soft-switching 4. ZVS 5. ZCS 6.Push-pull converter 7.Switching control method 8. Naturally clamped For Simulation Results of the project Contact Us Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245

  2. ELECTRICAL PROJECTS USING MATLAB/SIMULINK ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 SOFTWARE: MATLAB/SIMULINK CIRCUIT DIAGRAM: Fig. 1. Full-soft-swithicng CF push-pull converter proposed. EXPECTED SIMULATION RESULTS: Fig. 2. Experimental current and voltage waveforms of the switch S1.1 For Simulation Results of the project Contact Us Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245

  3. ELECTRICAL PROJECTS USING MATLAB/SIMULINK ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 Fig. 3. Experimental current and voltage waveforms of the switch S1.2. Fig. 4. Experimental current and voltage waveforms of the switch S4. CONCLUSION: For Simulation Results of the project Contact Us Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245

  4. ELECTRICAL PROJECTS USING MATLAB/SIMULINK ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 A novel bidirectional current-fed push-pull converter with galvanic isolation was introduced. It features full-soft switching operation of all semiconductor components, while its DC voltage gain is higher than in traditional current-fed converters due to the utilization of the circulating energy for the input voltage step-up. As a result, it does not suffer from short intervals of energy transfer from the input side to the output side since at least half of the switching period is dedicated for this. Moreover, it does not require any clamping circuits, since the novel control algorithm features natural clamping of the switches at the current-fed side. Despite a relatively high number of semiconductor components, it shows the peak efficiency of 96.3%, which does not depend on the energy transfer direction for the corresponding operating point. Soft-switching operation with continuous current at the current fed side makes the converter proposed suitable for residential battery energy storage systems. Further research will be directed towards experimental verification of the converter performance with a lithium iron phosphate battery. REFERENCES: [1] F. Blaabjerg, and D.M. Ionel, "Renewable Energy Devices and Systems – State-of-the-Art Technology, Research and Development, Challenges and Future Trends," Electric Power Components and Systems, vol.43, no.12, pp.1319-1328, 2015. [2] C, Heymans, S, B. Walker, S. B. Young, M. Fowler, "Economic analysis of second use electric vehicle batteries for residential energy storage and load-levelling," Energy Policy, vol. 71, pp. 22-30, Aug. 2014. [3] J. Weniger, T. Tjaden, V. Quaschning, "Sizing of Residential PV Battery Systems," Energy Procedia, vol. 46, pp. 78-87,2014. [4] S. J. Chiang, K. T. Chang and C. Y. Yen, "Residential photovoltaic energy storage system," IEEE Trans. Ind. Electron., vol. 45, no. 3, pp. 385-394, Jun 1998. [5] S. X. Chen, H. B. Gooi and M. Q. Wang, "Sizing of Energy Storage for Microgrids," IEEE Trans. Smart Grid, vol. 3, no. 1, pp. 142-151, 2012. For Simulation Results of the project Contact Us Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245

  5. ELECTRICAL PROJECTS USING MATLAB/SIMULINK ELECTRICAL PROJECTS USING MATLAB/SIMULINK Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245 For Simulation Results of the project Contact Us Gmail:asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in 0-9347143789/9949240245

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