The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지
DOI QR코드

DOI QR Code

New Pre-charging Method for Modular Multi-level Converter Operated in Nearest Level Control Modulation

근사 계단 제어 변조로 동작하는 모듈형 멀티 레벨 컨버터를 위한 새로운 초기 충전 기법

  • Kim, Kyo-Min (Dept. of Electrical Engineering, Myongji University) ;
  • Kim, Jae-Hyuk (Dept. of Electrical Engineering, Myongji University) ;
  • Kim, Do-Hyun (Dept. of Electrical Engineering, Myongji University) ;
  • Han, Byung-Moon (Dept. of Electrical Engineering, Myongji University)
  • Received : 2016.06.22
  • Accepted : 2016.09.07
  • Published : 2016.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

Recently the researches on Modular Multi-level Converter (MMC) are being highlighted because high quality and efficient power transmission are key issues in the High Voltage Direct Current (HVDC) transmission system. This paper proposes an improved pre-charging method for the sub-module capacitors in MMC that operates in Nearest Level Control (NLC) modulation. The proposed method does not require additional circuits or Pulse Width Modulation (PWM) techniques. The feasibility of proposed method was verified through computer simulations for a scaled 3-phase 10kVA MMC with 12 sub-modules per each arm. Hardware experiments with a scaled prototype were performed in the lab to confirm the simulation results.

Keywords

References

  1. G. Bergna et al., "An Energy-Based Controller for HVDC Modular Multilevel Converter in Decoupled Double Synchronous Reference Frame for Voltage Oscillation Reduction," in IEEE Transactions on Industrial Electronics, vol. 60, no. 6, pp. 2360-2371, June 2013. https://doi.org/10.1109/TIE.2012.2225397
  2. E. Solas, G. Abad, J. A. Barrena, S. Aurtenetxea, A. Carcar and L. Zajac, "Modular Multilevel Converter With Different Submodule Concepts - Part II: Experimental Validation and Comparison for HVDC Application," in IEEE Transactions on Industrial Electronics, vol. 60, no. 10, pp. 4536-4545, Oct. 2013. https://doi.org/10.1109/TIE.2012.2211431
  3. S. Rohner, S. Bernet, M. Hiller and R. Sommer, "Modulation, Losses, and Semiconductor Requirements of Modular Multilevel Converters," in IEEE Transactions on Industrial Electronics, vol. 57, no. 8, pp. 2633-2642, Aug. 2010. https://doi.org/10.1109/TIE.2009.2031187
  4. M. Saeedifard; R. Iravani; "Dynamic Performance of a Modular Multilevel Back-to-Back HVDC System" in IEEE Transactions on Power Delivery, vol. 25, no. 4, pp. 2903-2912, Oct. 2010. https://doi.org/10.1109/TPWRD.2010.2050787
  5. M. Glinka, "Prototype of multiphase modular- multilevelconverter with 2 MW power rating and 17-level- outputvoltage," Power Electronics Specialists Conference, 2004. PESC 04. 2004 IEEE 35th Annual, 2004, pp. 2572-2576, Vol. 4.
  6. M. Hagiwara and H. Akagi, "PWM control and experiment of modular multilevel converters," 2008 IEEE Power Electronics Specialists Conference, Rhodes, 2008, pp. 154-161.
  7. A. Lesnicar and R. Marquardt, "An innovative modular multilevel converter topology suitable for a wide power range," Power Tech Conference Proceedings, 2003 IEEE Bologna, 2003, pp. 6 pp. Vol. 3.
  8. S. Allebrod, R. Hamerski and R. Marquardt, "New transformerless, scalable Modular Multilevel Converters for HVDC-transmission," 2008 IEEE Power Electronics Specialists Conference, Rhodes, 2008, pp. 174-179.
  9. A. Antonopoulos, L. Angquist and H. P. Nee, "On dynamics and voltage control of the Modular Multilevel Converter," Power Electronics and Applications, 2009. EPE '09. 13th European Conference on, Barcelona, 2009, pp. 1-10.
  10. K. Ilves, A. Antonopoulos, S. Norrga and H. P. Nee, "A new modulation method for the modular multilevel converter allowing fundamental switching frequency," Power Electronics and ECCE Asia (ICPE & ECCE), 2011 IEEE 8th International Conference on, Jeju, 2011, pp. 991-998
  11. Q. Tu; Z. Xu; L. Xu; "Reduced Switching-Frequency Modulation and Circulating Current Suppression for Modular Multilevel Converters" in IEEE Transactions on Power Delivery, vol. 26, no. 3, pp. 2009-2017, July 2011. https://doi.org/10.1109/TPWRD.2011.2115258
  12. H. Saad, X. Guillaud, J. Mahseredjian, S. Dennetiere and S. Nguefeu, "MMC capacitor voltage decoupling and balancing controls," 2015 IEEE Power & Energy Society General Meeting, Denver, CO, 2015, pp. 1-1.
  13. Z. Wang, A. Zhang, H. Zhang, C. Zhang and Y. Bai, "Control strategy for modular multilevel converters in submodule fault state," Industrial Electronics and Applications (ICIEA), 2015 IEEE 10th Conference on, Auckland, 2015, pp. 369-374.
  14. R. Marquardt; A. Lesnicar, "New concept for high voltage-modular multilevel converter" in Proc. IEEE PESC, Aachen, Germany, 2004, pp. 1-5
  15. A. Lesnicar; R. Marquardt "An innovative modular multilevel converter topology suitable for a wide power range" in Proc. IEEE bologna Power Tech Cong., 2003, pp. 1-6
  16. J. Xu; C. Zhao; B. Zhang; L. Lu, "New precharge and submodule capacitor voltage balancing topologies of modular multilevel converter for VSC-HVDC application" in Proc. Asia-Pac. Power Energy Eng. Conf., 2011, pp. 1-4.
  17. A. Das; H. Nademi; L.Norum; "A method for charging and discharging capacitors in modular multilevel converter" in Proc. Annu. Conf. IEEE Ind. Electron. Soc., 2011, pp. 1058-1062
  18. K. Shi; F. Shen; D. Lv; P. Lin; M. Chen; D. Xu; "A novel start-up scheme for modular multilevel converter" in IEEE ECCE, 2012, pp. 4180-4187.
  19. P. Hu; D. Jiang; "A Level-Increased Nearest Level Modulation Method for Modular Multilevel Converters" in IEEE Transactions on Power Electronics, vol. 30, no. 4, pp. 1836-1842, April 2015. https://doi.org/10.1109/TPEL.2014.2325875