Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Neutral-Point Voltage Balancing Method for Three-Level Inverter Systems with a Time-Offset Estimation Scheme

  • Choi, Ui-Min (Dept. of Electrical and Computer Eng., Ajou University) ;
  • Lee, Kyo-Beum (Dept. of Electrical and Computer Eng., Ajou University)
  • Received : 2012.07.31
  • Published : 2013.03.20
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Abstract

This paper presents a neutral-point voltage balancing method for three-level inverter systems using a time-offset estimation scheme. The neutral-point voltage is balanced by adding a time-offset to the turn-on time of the switches. If an inaccurate time-offset is added, the neutral-point deviation still remains. An accurate time-offset is obtained through the proposed time-offset estimation scheme. This method is implemented without additional hardware, complex calculations, or analysis. The effectiveness of the proposed method is verified by experiments.

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References

  1. J. Bueno, S. Cobreces, J. Rodriguez, A. Hernandez, and F. Espinosa, "Design of a back-to-back NPC converter interface for wind turbines with squirrel-cage induction generator," IEEE Trans. Energy Convers., Vol. 23, No. 3, pp. 932-945, Sep. 2008. https://doi.org/10.1109/TEC.2008.918651
  2. J. Rodriguez, S. Bernet, P. K. Steimer, and I. E. Lizama, "A survey on neutral-point-clamped inverters," IEEE Trans. Ind. Electron., Vol. 57, No. 7, pp. 2219-2230, Jul. 2009.
  3. L. G. Franquelo, J. Rodríguez, J. I. León, S. Kouro, R. Portillo, and M. M. Prats "The age of multilevel converters arrives," IEEE Trans. Ind. Electron. Mag., Vol. 2, No. 2, pp. 28-39, June 2008. https://doi.org/10.1109/MIE.2008.923519
  4. K. Park and K. B. Lee, "Hardware simulator development for a 3-parallel grid-connected PMSG wind power system," Journal of Power Electronics, Vol. 10, No. 5, pp. 555-562, Sep. 2010. https://doi.org/10.6113/JPE.2010.10.5.555
  5. Y. J. Ko and K. B. Lee, "Fault diagnosis of a voltage-fed PWM inverter for a three-parallel power conversion system in a wind turbine," Journal of Power Electronics, Vol. 10, No. 6, pp. 686-693, Nov. 2010. https://doi.org/10.6113/JPE.2010.10.6.686
  6. H. G. Jeong, K. B. Lee, S. Choi, and W. Choi, "Performance improvement of LCL-filter based grid connected-inverters using PQR power transformations," IEEE Trans. Power Electron., Vol. 25, No. 5, pp. 1320-1330, May 2010. https://doi.org/10.1109/TPEL.2009.2037225
  7. U. M. Choi, H. G. Jeong, K. B. Lee, and F. Blaabjerg, "Method for detecting an open-switch fault in a grid-connected NPC inverter system," IEEE Trans. Power Electron., Vol. 27, No. 6, pp. 2726-2739, Jun. 2012. https://doi.org/10.1109/TPEL.2011.2178435
  8. B. Wu, High-Power Converters and AC Drives, New Jersey: John Wiley & Sons Inc, 2006.
  9. A. Lewicki, Z. Krzeminski, and H. Abu-Rub, "Space-vector pulsewidth modulation for three-level npc converter with the neutral point voltage control," IEEE Trans. Ind. Electron., Vol. 58, No. 11, pp. 5076-5086, Nov. 2011. https://doi.org/10.1109/TIE.2011.2119453
  10. S. B. Monge, S. Somavilla, and J. Bordonau, and D. Boroyevich, "Capacitor voltage balance for the neutral-point-clamped converter using the virtual space vector concept with optimized spectral performance," IEEE Trans. Power Electron., Vol. 22, No. 4, pp. 1128-1135, Jul. 2007. https://doi.org/10.1109/TPEL.2007.900547
  11. B. Ashish, V. Giri, R. Don, and S. Vijay, "Modeling and design of a neutral-point voltage regulator for a three-level diode-clamped inverter using multiple-carrier modulation," IEEE Trans. Ind. Electron., Vol. 53, No. 3, pp. 718-726, Jun. 2006. https://doi.org/10.1109/TIE.2006.874424
  12. R. Maheshwari, S. Munk-Nielsen, and S. Busquets-Monge, "Design of neutral-point voltage controller of a three-level npc inverter with small dc-link capacitors," IEEE Trans. Ind. Electron., unpublished.
  13. S. Srikanthan and M. K. Mishra, "DC capacitor voltage equalization in neutral clamped inverters for DSTATCOM application," IEEE Trans. Ind. Electron., Vol. 57, No. 8, pp. 2768-2775, Aug. 2010.
  14. K. K. Tan, G. Feng, P. C. Loh, and F. Blaabjerg, "Enhanced buck-boost neutral-point-clamped inverters with simple capacitive-voltage balancing," IEEE Trans. Ind. Appl., Vol. 46, No. 3, pp. 1021-1033, May/Jun. 2010. https://doi.org/10.1109/TIA.2010.2045215
  15. J. Holtz and N. Oikonomou, "Neutral point potential balancing algorithm at low modulation index for three-level inverter medium-voltage drives," IEEE Trans. Ind. Appl., Vol. 43, No. 3, pp. 761-768, May/Jun. 2007. https://doi.org/10.1109/TIA.2007.895767
  16. L. Ben-Brahim and S. Tadakuma, "A novel multilevel carrier-based PWM-control method for GTO inverter in low modulation region," IEEE Trans. Ind. Appl., Vol. 42, No. 1, pp. 121-127, Jan./Feb. 2006. https://doi.org/10.1109/TIA.2005.861321
  17. S. R. Pulikanti, M. S. A. Dahidah, and V. G. Agelidis, "Voltage balancing control of three-level active NPC converter using SHE-PWM," IEEE Trans. Power Del., Vol. 26, No. 1, pp. 258-267, Jan. 2011. https://doi.org/10.1109/TPWRD.2010.2063718

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