A New Transformerless DC-DC Converter for Renewable Energy Applications

Document Type : Research paper

Authors

1 Department of Electrical Power Techniques Engineering, Technical College of AL-Mausaib, Iraq

2 Department of Power Engineering, Al-Furat Al-Awsat TechnicalUniversity, Babylon, Iraq

Abstract

In this paper, a novel high step-up voltage switching cell formed by four passive elements and three diodes is proposed. The proposed cell can be integrated into a family of boost converters to obtain substantial dc gain as required by an electrical grid supplied such as solar or fuel cell. It is integrated into a boost converter; a new converter is obtained. The features of a new converter are significant dc gain without extreme duty cycle which enables the use of lower voltage and R${}_{Ds-on}$ MOSFET switch so as to reduce cost, the low-stress voltage on the switch and diodes, non-pulsating input current, easiness design and operation, single switch which means easiness of transistor driving, and line-load common ground. In addition, the low-voltage stress across diode allows using Schottky rectifiers to eliminate the reverse recovery current which leads to more reduction in conduction and switching losses. The equations of voltage and current in "continuous conduction mode (CCM) and discontinuous mode (DCM)" are extracted. Moreover, the voltage and current stresses on elements and switch are calculated. Finally, the performance of the proposed converter is validated by simulation results and experimental results to confirm theoretical calculation.

Keywords

References

  1. Tewari, V. T. Sreedevi, “A novel single switch dc-dc converter with high voltage gain capability for solar PV based power generation systems”, Sol. Energy, vol. 3, pp. 466-477, 2018.
  2. M. Shahir, E. Babaei, M. Farsadi, "Extended topology for a boost dc–dc converter", IEEE Trans. Power Electron., vol. 34, no. 3, pp. 2375-2384, 2019.
  3. Babaei et al., "Extendable Nonisolated High Gain DC–DC Converter Based on Active–Passive Inductor Cells," IEEE Trans. Ind. Electron., vol. 65, no. 12, pp. 9478-9487, 2018.
  4. Axelrod, Y. Berkovich, A. Ioinovici, "SwitchedCapacitor/Switched-Inductor Structures for Getting Transformerless Hybrid DC–DC PWM Converters", EEE Trans. Circuits Syst. I Regul. Pap., vol. 55, no. 2, pp. 687-696, 2008.
  5. Zhu, T. Wang, F. L. Luo, "Analysis of voltage-lift-type boost converters", In 2012 7th IEEE Conf. Ind. Electron. Applica. (ICIEA), pp. 214-219, 2012.
  6. Li, Y. Hu, A. Ioinovici, "Generation of the Large DC Gain Step-Up Nonisolated Converters in Conjunction
  1. With Renewable Energy Sources Starting From a Proposed Geometric Structure", IEEE Trans. Power Electro., vol. 32, no. 7, pp. 5323-5340, 2017.
  1. Axelrod, Y. Berkovich, A. Ioinovici, "Transformerless DC-DC converters with a very high DC line-to-load voltage ratio", J. Circuits, Syst., Computers. vol. 13, no. 3, pp. 467-75, 2004.
  2. L. Luo, H. Ye, "Positive output super-lift converters", IEEE Trans. Power Electron., vol. 18, no. 1, pp. 105-113, 2003.
  3. Li, Y. Hu, A. Ioinovici, "A new switching cell for a family of large DC gain non-isolated converters", IECON 2015-41st Annual Conf. IEEE Ind. Electron. Society, pp. 000719-000724, 2015.
  4. Zhu, F. L. Luo, Y. He, "Remaining Inductor Current Phenomena of Complex DC–DC Converters in Discontinuous Conduction Mode: General Concepts and Case Study", IEEE Trans. Power Electron., vol. 23, no. 2, pp. 1014-1019, 2008.
  5. Chen et al., "Hybrid switched-capacitor quadratic boost converters with very high DC gain and low voltage stress on their semiconductor devices", 2016 IEEE Energy Convers. Cong. Exposition (ECCE), pp. 1-8, 2016.
  6. Yang, T. Liang, J. Chen, "Transformerless DC–DC Converters With High Step-Up Voltage Gain", IEEE Trans. Ind. Electron., vol. 56, no. 8, pp. 3144-3152, 2009.
  7. I. Hwu, C. F. Chuang, W. C. Tu, "High VoltageBoosting Converters Based on Bootstrap Capacitors and Boost Inductors", IEEE Trans. Ind. Electron., vol. 60, no. 6, pp. 2178-2193, 2013.
  8. Berkovich et al., "Improved Luo converter modifications with increasing voltage ratio", IET Power Electron., vol. 8, no. 2, pp. 202-212, 2015.
  9. Jiao, F. L. Luo, B. K. Bose, "Voltage-lift split-inductor-type boost converters", IET Power Electron., vol. 4, no. 4, pp. 353-362, 2011.
  10. Kuma, P. Sensarma, "Ripple-Free Input Current High Voltage Gain DC–DC Converters With Coupled Inductors", IEEE Trans. Power Electron., vol. 34, no. 4, pp. 3418-3428, 2019.
  11. Lee, H. Do, "Zero-Ripple Input-Current High-Step-Up Boost–SEPIC DC–DC Converter With Reduced Switch-Voltage Stress", IEEE Trans. Power Electron., vol. 32, no. 8, pp. 6170-6177, 2017.
  12. Sri Revathi, P. Mahalingam, "Non-isolated high gain DC–DC converter with low device stress and input current ripple", IET Power Electron., vol. 11, no. 15, pp. 2553-2562, 2018.
  13. Maheri et al., "High Step-Up DC–DC Converter With Minimum Output Voltage Ripple," IEEE Trans. Ind. Electron., vol. 64, no. 5, pp. 3568-3575, 2017.
  14. Luo, H. Ye, "Essential DC/DC Converters. CRC Press, 2018.
  15. L. Luo, "Luo-Converters, a series of new DC-DC stepup (boost) conversion circuits", Proc. 2st Int. Conf. Power Electron. Drive Syst., vol. 2, pp. 882-888, 1997.
  16. M. Shahir, E. Babaei, M. Farsadi, "Analysis and design of voltage-lift technique-based non-isolated boost dc–dc converter", IET Power Electron., vol. 11, no. 6, pp. 1083-1091, 2018.
  17. I. Hwu, C. F. Chuang, W. C. Tu, "High VoltageBoosting Converters Based on Bootstrap Capacitors and Boost Inductors", IEEE Trans. Ind. Electron., vol. 60, no. 6, pp. 2178-2193, 2013.
  18. Berkovich et al., "Improved Luo converter modifications with increasing voltage ratio", IET Power Electron., vol. 8, no. 2, pp. 202-212, 2015.
  19. M. Shahir et al., “A new dc-dc converter based on voltage lift technique”, Int. Trans. Elec. Energy Syst. (ETEP), vol. 26, pp. 1260-1286, 2016.
  20. M. Maheri et al., "High Step-Up DC–DC Converter With Minimum Output Voltage Ripple", IEEE Trans. Ind. Electron., vol. 64, no. 5, pp. 3568-3575, 2017.
  21. Yang, T. Liang, J. Chen, "Transformerless DC–DC Converters With High Step-Up Voltage Gain", IEEE Trans. Ind. Electron., vol. 56, no. 8, pp. 3144-3152, 2009.
Journal of Operation and Automation in Power Engineering
Volume 12, Issue 1
January 2024
Pages 35-41

Files

History

  • Receive Date: 28 March 2022
  • Revise Date: 21 April 2022
  • Accept Date: 05 May 2022

Share

How to cite

Statistics