플라잉 커패시터 멀티-레벨 인버터의 커패시터 전압 균형을 이루기 위한 캐리어 비교방식의 대칭 기법

A Symmetric Carrier Technique of CRPWM for Voltage Balance Method of the Flying Capacitor Multi-level Inverter

  • 발행 : 2003.12.01

초록

This paper presents a simple carrier symmetric method for the voltage balance of flying capacitors in FCMLI(flying capacitor multi-level inverter). To achieve the voltage balance of flying capacitors, the utilization of each carrier must be balanced during a half-cycle of the switching period such as PSPWM(Phase-Shifted PWM). However, the CRPWM(Carrier Redistribution PWM) method causes the fluctuation of flying capacitor voltages because the balanced utilization of carriers is not achieved. Moreover, it does not consider that the load current change has an influence on flying capacitor voltages by assuming that the current flows into the load. To overcome the drawbacks of CRPWM, it is modified by the technique that carriers of each band are disposed symmetrically at every fundamental period. Firstly, the CRPWM method is reviewed and the theory on voltage balance of flying capacitors is analyzed. The proposed method is introduced and is verified through the experiment result.

키워드

참고문헌

  1. C. Hochgraf, R. Lasseter, D. Divan, T. Lipo, 'Comparision of multilevel inverters for static Var compensation,' in Proc. IEEE Ind. Applicat. Soc. Annu Conf., vol. 2, pp. 921-928, 1994 https://doi.org/10.1109/IAS.1994.377528
  2. T. A. Meynard, H. Foch, 'Multi-level conversion: High voltage choppers and voltage-source inverter,' in Proc. IEEE Power Electron. Spec. Conf., vol. 1, pp. 397-403, 1992 https://doi.org/10.1109/PESC.1992.254717
  3. J. Rodriguez, Jih-Sheng, Lai, Fang, Zheng, Peng, 'Multilevel inverter: a survey of topologies, controls, and applications,' IEEE Trans. on Industrial Electronics., vol. 49, pp.724-738, Aug. 2002 https://doi.org/10.1109/TIE.2002.801052
  4. A. Nabae, I. Takahashi and H. Akagi, 'A New Neutral-point-clamped PWM Inverter,' IEEE Trans. Ind. Applicat., vol. 17, No. 5, pp. 518-523, 1981 https://doi.org/10.1109/TIA.1981.4503992
  5. Gasulla-Fomer, M. Jordana-Barnils, J. Pallas-Areny, R. Torrents, J. M, 'The floating capacitor as a differential building block,' IEEE Trans. on instrumentation and measurement, vol. 47, Issue. 1, Feb. 1998 https://doi.org/10.1109/19.728783
  6. C. Newton, M. Summer, 'Multi-level converter a real solution to medium/high-voltage drives,' Power Engineering Journal, vol. 12, Issue. 1, Feb. 1998
  7. X. Yuan, H. Stemmler and I. Barbi, 'Investigation on the Clamping Voltage Self-Balancing of the Three-Level Capacitor Clamping Inverter,' in Proc. IEEE Power Enectron. Spec. Conf., pp.1059-1064, 1999 https://doi.org/10.1109/PESC.1999.785642
  8. S. G. Lee, D. W. Kang, Y. H. Lee and D. S. Hyun, 'The Carrier-Based PWM method for voltage Balancing of Flying Capacitor Multilevel Inverter', IEEE Power Electron. Spec. Conf., vol. 1, pp.126-131,2001 https://doi.org/10.1109/PESC.2001.954006
  9. D. W. Kang, Y. H. Lee, B. S. Suh, C. H. Choi and D. S. Hyun, 'An Improved Carrier-based SVPWM Method Using Leg Voltage Redundancies for Generalized Cascaded Multilevel Inverter Topology,' IEEE Trans. on Power Electronics., vol. 18, no. 1, pp. 180-187, Jan. 2003 https://doi.org/10.1109/TPEL.2002.807187
  10. Y. Liang, C. O. Nwankpa, 'A Power Line Conditioner Based on Flying capacitor multilevel Voltage Source Converter with Phase Shift SPWM,' IEEE Trans. on Industry Applications., vol. 36, Issue. 4, pp. 965-971, Aug. 2000 https://doi.org/10.1109/28.855948