전력전자학회논문지 (The Transactions of the Korean Institute of Power Electronics)

  • 제23권5호
  • /
  • Pages.336-344
  • /
  • 2018
  • /
  • 1229-2214(pISSN)
  • /
  • 2288-6281(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
권호 표지
DOI QR코드

DOI QR Code

양극성 DC 배전용 3상 3-레벨 컨버터의 누설전류 저감과 NP 전류 제어를 위한 공간벡터 PWM 방법

Space Vector PWM Method for Leakage Current Reduction and NP Current Control in 3-phase 3-level Converter used in Bipolar DC Distribution System

  • Lee, Eun-Chul (Division of Electrical Engineering, Hanyang University) ;
  • Choi, Nam-Sup (Division of Electrical, Electronic Communication & Computer Eng., Chonnam National University) ;
  • Kim, Hee-Jun (Division of Electrical Engineering, Hanyang University)
  • 투고 : 2018.07.15
  • 심사 : 2018.08.11
  • 발행 : 2018.10.20
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

This study proposes a new PWM method for leakage current reduction and neutral point (NP) current control in three-phase three-level converter employed in bipolar DC distribution systems. The proposed PWM method uses medium vectors only when there is no need to control the NP current. Thus, common mode voltages are held constant to realize zero leakage current. Some space vectors that produce low-frequency common mode voltages are employed to minimize leakage currents when the average NP current needs to be a positive or negative value. The proposed space vector PWM is implemented based on barycentric coordinate. The validity of the proposed PWM method is verified by simulations and experiments.

키워드

참고문헌

  1. D. Kumar, F. Zare, and A. Ghosh, "DC microgrid technology: System architectures, AC grid Interfaces, grounding schemes, power quality, communication networks, applications, and standardizations aspects," IEEE Access, Vol. 5, pp. 12230-12256, 2017. https://doi.org/10.1109/ACCESS.2017.2705914
  2. Z. Jin, M. Savaghebi, and J. C. Vasquez, "Maritime DC microgrids-a combination of microgrid technologies and maritime onboard power system for future ships," 2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia), Hefei, China, May 2016.
  3. S. D. Tavakoli, G. Kadkhodaei, M. Mahdavyfakhr, M. Hamzeh, and K. Sheshyekani, "Interlinking converters in application of bipolar dc microgrids," 2017 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC), pp. 37-42, Mashhad, Iran, Feb. 2017.
  4. A. L. Julian, G. Oriti, and T. A. Lipo, "Elimination of common-mode voltage in three-phase sinusoidal power converters," IEEE Trans. on Power Electronics, Vol. 14, No. 5, Sep. 1999.
  5. T. Kerekes, R. Teodorescu, and U. Borup, "Transformerless photovoltaic inverters connected to the grid," Conf. Record on APEC 2007, Anaheim, USA, pp. 1733-1737, Feb./Mar. 2007.
  6. J. S. Lee and K. B. Lee, "New modulation techniques for a leakage current reduction and a neutral-point voltage balance in transformerless photovoltaic systems using a three-level inverter," IEEE Trans. on Power Electronics, Vol. 29. No. 14, Apr. 2014.
  7. K. S. Ahn, N. S. Choi, E. C. Lee, and H. J. Kim, “A study on a carrier based PWM having constant common mode voltage and minimized switching frequency in three-level inverter,” Journal of Electrical Engineering & Technology, Vol. 11, No. 2, pp. 393-404, Mar. 2016. https://doi.org/10.5370/JEET.2016.11.2.393
  8. Tondeur, Barycentric Representation for the Incenter and Excenters of a Triangle, Amer. Math. Monthly 94 Vol. 10, pp. 975-976, 1987. https://doi.org/10.1080/00029890.1987.12000746
  9. N. S. Choi and E. C. Lee, "Simple Implementation of space vector PWM using barycentric coordinates," Conference Record on Korea Institute of Power Electronics 2015 Summer Conference, pp. 45-46, Jul. 2015.