Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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A New Control Strategy for Input Voltage Sharing in Input Series Output Independent Modular DC-DC Converters

  • Yang, Wei (School of Electrical Engineering and Automation, Harbin Institute of Technology) ;
  • Zhang, Zhijie (School of Electrical Engineering and Automation, Harbin Institute of Technology) ;
  • Yang, Shiyan (School of Electrical Engineering and Automation, Harbin Institute of Technology)
  • Received : 2016.11.12
  • Accepted : 2017.01.29
  • Published : 2017.05.20
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Abstract

Input series output independent (ISOI) dc-dc converter systems are suitable for high voltage input and multiple output applications with low voltage rating switches. This paper proposes a novel control strategy consisting of one output voltage regulating (OVR) control loop and n-1 (n is the number of modules in the ISOI system) input voltage sharing (IVS) control loops. An ISOI system with the proposed control strategy can be applied to applications where the output loads of each module are the same. Under these conditions, IVS can be achieved and output voltages copying can be realized in an ISOI system. In this control strategy there is only one controller for each module and the design process of the control loops is simple. Since no central controller is needed in the system, modularity of the system is improved. The operation principle of the new control strategy is introduced and the control effect is simulated. Then the output power and voltage characteristics of an ISOI system under this new control strategy are analyzed. The stability of the proposed control strategy is explored base on a Hurwitz criterion, and the design guide line of the control strategy is given. A two module ISOI system prototype is fabricated and tested in the laboratory. Experimental results verify the effectiveness of the proposed control strategy.

Keywords

References

  1. X. Hu and C. Gong, "A high gain input-parallel output-series DC/DC converter with dual coupled inductors," IEEE Trans. Power Electron., Vol. 30, No. 3, pp. 1306-1317, Apr. 2014. https://doi.org/10.1109/TPEL.2014.2315613
  2. Q. Du, B. Qi, T. Wang, T. Zhang, and X. Li, "A high-power input parallel output-series buck and half-bridge converter and control methods," IEEE Trans. Power Electron., Vol. 27, No. 6, pp. 2703-2715, Jun. 2012. https://doi.org/10.1109/TPEL.2011.2178268
  3. B. Choi, "Dynamics and control of switch mode power conversions in distributed power systems," Ph.D. Dissertation, Virginia Polytech. Inst. State Univ., Blacksburg, May 1992.
  4. Y. Panov and M. M. Jovanovic, "Stability and dynamic performance of current sharing control for paralleled voltage regulator modules," IEEE Trans. Power Electron., Vol. 17, No. 2, pp. 172-179, Mar. 2002. https://doi.org/10.1109/63.988827
  5. J. Kim, H. Choi, and B. H. Cho, "A novel droop method for converter parallel operation," IEEE Trans. Power Electron., Vol. 17, No. 1, pp. 25-32, Jan. 2002.
  6. B. T. Irving and M. M. Jovanovic, "Analysis, design, and performance evaluation of droop current-sharing method," in Proc. IEEE Appl. Power Electron. Conf. (APEC), 2000, pp. 235-241.
  7. J. W. Kim, J. S. You, and B. H. Cho, "Modeling, control, and design of input series output parallel connected converter for high speed train power system," IEEE Trans. Ind. Electron., Vol. 48, No. 3, pp. 536-544, Jun. 2001. https://doi.org/10.1109/41.925580
  8. V. Vorperian, "Synthesis of medium voltage dc-to-dc converters from low-voltage, high-frequency PWM switching converters," IEEE Trans. Power Electron., Vol. 22, No. 5, pp. 1619-1635, Sep. 2007. https://doi.org/10.1109/TPEL.2007.904170
  9. S. Inoue and H. Akagi, "A bidirectional isolated dc-dc converter as a core circuit of the next-generation medium-voltage power conversion system," IEEE Trans. Power Electron., Vol. 22, No. 2, pp. 535-542, Mar. 2007. https://doi.org/10.1109/TPEL.2006.889939
  10. R. Giri, V. Choudhary, R. Ayyanar, and N. Mohan, "Common duty ratio control of input-series connected modular dc-dc converters with active input voltage and load current sharing," IEEE Trans. Ind. Appl., Vol. 42, No. 4, pp. 1101-1111, Jul./Aug. 2006. https://doi.org/10.1109/TIA.2006.876064
  11. J. Shi, J. Luo, and X. He, "Common duty ratio control of input-series output-parallel connected phase-shift full-bridge dc-dc converter modules," IEEE Trans. Power Electron., Vol. 26, No. 11, pp. 3318-3329, Nov. 2011. https://doi.org/10.1109/TPEL.2011.2142325
  12. B. R. Lin and C. Chao, "Soft switching converter with two series half bridge legs to reduce voltage stress of active switches," IEEE Trans. Ind. Electron., Vol. 60, No. 6, pp. 2214-2224, Jun. 2013. https://doi.org/10.1109/TIE.2012.2191758
  13. H. Wu, P. Xu, W. Liu, and Y. Xing, "Series-input interleaved forward converter with a shared switching leg for wide input voltage range applications," IEEE Trans. Ind. Electron., Vol. 60, No. 11, pp. 5029-5039, Nov. 2013. https://doi.org/10.1109/TIE.2012.2221116
  14. J. Kim, J. You, and B. Cho, "Modeling, control, and design of input series output parallel connected converter for high-speed-train power system," IEEE Trans. Ind. Electron., Vol. 48, No. 3, pp. 536-544, Jun. 2001. https://doi.org/10.1109/41.925580
  15. K. Siri, M. Willhoff, and K. Conner, "Uniform voltage distribution control for series connected DC-DC converters," IEEE Trans. Power Electron., Vol. 22, No. 4, pp. 1269-1279, Jul. 2007. https://doi.org/10.1109/TPEL.2007.900555
  16. X. Ruan, W. Chen, L. Cheng, C. Tse, H. Yan, and T. Zhang, "Control strategy for input-series-output-parallel converters," IEEE Trans. Ind. Electron., Vol. 56, No. 4, pp. 1174-1185, Apr. 2009. https://doi.org/10.1109/TIE.2008.2007980
  17. R. Ayyanar, R. Giri, and N. Mohan, "Active input voltage and load current sharing in input series and output parallel connected modular dc-dc converters using dynamic input-voltage reference scheme," IEEE Trans. Power Electron., Vol. 19, No. 6, pp. 1462-1472, Nov. 2004. https://doi.org/10.1109/TPEL.2004.836671
  18. S. Yang, Y. Fang, X. Qiu, and C. Gong, "Voltage sharing control for interleaving series-parallel dual two-transistor forward converter," in Proc. IEEE IECON/IECON, pp. 1896-1900, 2007.
  19. D. Sha, Z. Guo, and X. Liao, "Cross feedback output-current-sharing control for input series output parallel modular DC-DC converters," IEEE Trans. Power Electron., Vol. 25, No. 11, pp. 2762-2771, Nov. 2010. https://doi.org/10.1109/TPEL.2010.2049504
  20. D. Sha, K. Deng, Z. Guo, and X. Liao, "Control strategy for input series output parallel high-frequency AC link inverters," IEEE Trans. Ind. Electron., Vol. 59, No. 11, pp. 4101-4111, Nov. 2012. https://doi.org/10.1109/TIE.2011.2174538
  21. W. Chen, G. Wang, X. Ruan, W. Jiang, and W. Gu, "Wireless input voltage sharing control strategy for input-series output parallel (ISOP) system based on positive output voltage gradient method," IEEE Trans. Ind. Electron., Vol. 61, No. 11, pp. 6022-6030, Nov. 2014. https://doi.org/10.1109/TIE.2014.2308147
  22. G. Xu, D. Sha, and X. Liao, "Decentralized inverse droop control for input series output parallel DC-DC converters," IEEE Trans. Power Electron., Vol. 30, No. 9, pp. 4621-4625, Sep. 2015. https://doi.org/10.1109/TPEL.2015.2396898
  23. R. Giri, R. Ayyanar, and E. Ledezma, "Input series and output series connected modular dc-dc converters with active input voltage and output voltage sharing," in Proc. IEEE APEC Expo., pp. 1751-1754, 2004.
  24. D. Sha, K. Deng, and X. Liao, "Duty cycle exchanging control for input-series-output-series connected two PS-FB dc-dc converters," IEEE Trans. Power Electron., Vol. 27, No. 3, pp. 1490-1501, Mar. 2012. https://doi.org/10.1109/TPEL.2011.2165084
  25. W. Chen and G. Wang, "Decentralized voltage-sharing control strategy for fully modular input-series-output-series system with improved voltage regulation," IEEE Trans. Ind. Electron., Vol. 62, No. 6, pp. 2777-2787, May 2015. https://doi.org/10.1109/TIE.2014.2365433
  26. Q. Hu and R. Zane, "LED driver circuit with series-input-connected converter cells operating in continuous conduction mode," IEEE Trans. Power Electron., Vol. 25, No. 3, pp. 574-582, Mar. 2010. https://doi.org/10.1109/TPEL.2009.2029337
  27. T. Meng, H. Ben, and G. Wei, "Input-series multiple-output auxiliary power supply scheme based on transformer-integration for high-input-voltage applications," Journal of Power Electronics, Vol. 12, No. 3, pp. 439-447, May 2012. https://doi.org/10.6113/JPE.2012.12.3.439
  28. T. Meng, C. Li, H. Ben, and J. Zhao, "An input-series flyback auxiliary power supply scheme based on transformer integration for high-input-voltage applications," IEEE Trans. Power Electron., Vol. 31, No. 9, pp. 6383-6393, Sep. 2016. https://doi.org/10.1109/TPEL.2015.2505322
  29. Y. Li and Y. Han, "Control of input-series and output independent power converter building block system based on buck converter topology," in Proc. IEEE Appl. Power Electron. Conf. (APEC), pp. 422-429, 2015.