DOI QR코드

DOI QR Code

양극성 직류 배전망에 적용 가능한 3포트 NPC 기반의 DAB 컨버터에 대한 연구

A Study of the Three Port NPC based DAB Converter for the Bipolar DC Grid

  • Yun, Hyeok-Jin (Power Conversion and Control Research Center, HVDC Research Division, KERI) ;
  • Kim, Myoungho (Power Conversion and Control Research Center, HVDC Research Division, KERI) ;
  • Baek, Ju-Won (Power Conversion and Control Research Center, HVDC Research Division, KERI) ;
  • Kim, Ju-Yong (Smart Power Distribution Lab. Power Distribution ICT Group. KEPCO) ;
  • Kim, Hee-Je (Dept. of Electrical Eng., Pusan Nat'l University)
  • 투고 : 2017.02.12
  • 심사 : 2017.04.28
  • 발행 : 2017.08.20

초록

This paper presents the three-port DC-DC converter modeling and controller design procedure, which is part of the solid-state transformer (SST) to interface medium voltage AC grid to bipolar DC distribution network. Due to the high primary side DC link voltage, the proposed converter employs the three-level neutral point clamped (NPC) topology at the primary side and 2-two level half bridge circuits for each DC distribution network. For the proposed converter particular structure, this paper conducts modeling the three winding transformer and the power transfer between each port. A decoupling method is adopted to simplify the power transfer model. The voltage controller design procedure is presented. In addition, the output current sharing controller is employed for current balancing between the parallel-connected secondary output ports. The proposed circuit and controller performance are verified by experimental results using a 30 kW prototype SST system.

키워드

참고문헌

  1. V. G. Agelidis, G. D. Demetriades, and N. Flourentzou, "Recent advances in high-voltage direct-current power transmission systems," 2006 IEEE International Conference on Industrial Technology, pp. 206-213, Dec. 2006.
  2. H. Wang and M. A. Redfern, "The advantages and disadvantages of using HVDC to interconnect AC networks," 45th International Universities Power Engineering Conference UPEC2010, pp. 1-5, Sep. 2010.
  3. W. A. Rodrigues, L. M. F. Morais, and T. R. Oliveira, "Analysis of solid state transformer based microgrid system," 2016 12th IEEE International Conference on Industry Applications, pp. 1-6, Nov. 2016.
  4. A. Q. Huang, M. L. Crow, G. T. Heydt, J. P. Zheng, and S. J. Dale, "The future renewable electric energy delivery and management (FREEDM) system: The energy internet," Proceedings of the IEEE, Vol. 99, No. 1, pp. 133-148, Jan. 2011. https://doi.org/10.1109/JPROC.2010.2081330
  5. X. Wang, J. Liu, S. Ouyang, T. Xu, F. Meng, and S. Song, "Control and experiment of an H-bridge-based three-phase three-stage modular power electronic transformer," IEEE Transactions on Power Electronics, Vol. 31, pp. 2002-2011, Mar. 2016. https://doi.org/10.1109/TPEL.2015.2434420
  6. Y. M. Park, J. Y. Yoo, and S. B. Lee, "Practical implementation of PWM synchronization and phase-shift method for cascaded H-bridge multilevel inverters based on a standard serial communication protocol," IEEE Transactions on Industry Applications, Vol. 44, pp. 634-643, Mar. 2008. https://doi.org/10.1109/TIA.2008.916742
  7. S. H. Baek, S. Roy, S. Bhattacharya, and S. M. Kim, "Power flow analysis for 3-port 3-phase dual active bridge dc/dc converter and design validation using high frequency planar transformer," 2013 IEEE Energy Conversion Congress and Exposition, pp. 388-395, Sep. 2013.
  8. B. Fan, K. Wang, Y. Li, L. Xu, and Z. Zheng, "Capacitor voltage balancing control of a flying capacitor based n-level DC-DC converter," 2015 17th European Conference on Power Electronics and Applications, pp. 1-8, Sep. 2015.
  9. R. W. Erickson and D. Maksimovic, "A multiple-winding magnetics model having directly measurable parameters," in Power Electronics Specialists Conference, PESC 98 Record. 29th Annual IEEE, pp. 1472-1478, 1998.
  10. R. W. D. Doncker, D. M. Divan, and M. Kheraluwala, "A three-phase soft-switched high-power-density dc /dc converter for high-power applications," IEEE Transactions on Industry Applications, Vol. 27, pp. 63-73, Jan. 1991. https://doi.org/10.1109/28.67533
  11. E. Gagnon, A. Pomerleau, and A. Desbiens, "Simplified, ideal or inverted decoupling?," ISA Transactions, Vol. 37, pp. 265-276, 1998. https://doi.org/10.1016/S0019-0578(98)00023-8