Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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New Strategy for Eliminating Zero-sequence Circulating Current between Parallel Operating Three-level NPC Voltage Source Inverters

  • Li, Kai (School of Automation Engineering, University of Electronic Science and Technology of China) ;
  • Dong, Zhenhua (School of Automation Engineering, University of Electronic Science and Technology of China) ;
  • Wang, Xiaodong (School of Automation Engineering, University of Electronic Science and Technology of China) ;
  • Peng, Chao (School of Automation Engineering, University of Electronic Science and Technology of China) ;
  • Deng, Fujin (School of Electrical Engineering, Southeast University) ;
  • Guerrero, Josep (Department of Energy Technology, Aalborg University) ;
  • Vasquez, Juan (Department of Energy Technology, Aalborg University)
  • Received : 2017.06.07
  • Accepted : 2017.09.27
  • Published : 2018.01.20
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Abstract

A novel strategy based on a zero common mode voltage pulse-width modulation (ZCMV-PWM) technique and zero-sequence circulating current (ZSCC) feedback control is proposed in this study to eliminate ZSCCs between three-level neutral point clamped (NPC) voltage source inverters, with common AC and DC buses, that are operating in parallel. First, an equivalent model of ZSCC in a three-phase three-level NPC inverter paralleled system is developed. Second, on the basis of the analysis of the excitation source of ZSCCs, i.e., the difference in common mode voltages (CMVs) between paralleled inverters, the ZCMV-PWM method is presented to reduce CMVs, and a simple electric circuit is adopted to control ZSCCs and neutral point potential. Finally, simulation and experiment are conducted to illustrate effectiveness of the proposed strategy. Results show that ZSCCs between paralleled inverters can be eliminated effectively under steady and dynamic states. Moreover, the proposed strategy exhibits the advantage of not requiring carrier synchronization. It can be utilized in inverters with different types of filter.

Keywords

References

  1. K. Xing, Modeling, analysis, and design of distributed power electronics system based on building block concept, Ph.D. dissertation, Virginia Polytechnic Institute and State University, 1999.
  2. Z. Ye, K. Xing, S. Mazumder, D. Borojevic, and F. C. Lee, "Modeling and control of parallel three-phase PWM boost rectifiers in PEBB-based DC distributed power systems," in Thirteenth Annual Applied Power Electronics Conference and Exposition (APEC), pp. 1126-1132, Feb. 1998.
  3. J. M. Guerrero, J. C. Vasquez, J. Matas, L. G. de Vicuna, and M. Castilla, "Hierarchical control of droop-controlled AC and DC microgrids - A general approach toward standardization," IEEE Trans. Ind. Electron., Vol. 58, No. 1, pp. 158-172, Jan. 2011. https://doi.org/10.1109/TIE.2010.2066534
  4. Z. Ye, Modeling and control of parallel three-phase PWM converters, Ph.D. dissertation, Virginia Polytechnic Institute and State University, 2000.
  5. K. Matsui, Y. Murai, M. Watanabe, M. Kaneko, and F. Ueda, “A pulsewidth-modulated inverter with parallel connected transistors using current-sharing reactors,” IEEE Trans. Power Electron., Vol. 8, No. 2, pp. 186-191, Apr. 1993. https://doi.org/10.1109/63.223970
  6. S. Fukuda and K. Matsushita, "A control method for parallel-connected multiple inverter systems," in Seventh International Conference on Power Electronics and Variable Speed Drive, pp. 175-180, Sep. 1998.
  7. Z. Ye, D. Boroyevich, J. Y. Choi, and F. C. Lee, “Control of circulating current in two parallel three-phase boost rectifiers,” IEEE Trans. Power Electron., Vol. 17, No. 5, pp. 609-615, Sep. 2002.
  8. X. Zhang, W. Zhang, J. Chen, and D. Xu, “Deadbeat control strategy of circulating currents in parallel connection system of three-phase PWM converter,” IEEE Trans. Energy Convers., Vol. 29, No. 2, pp. 406-417, Jun. 2014. https://doi.org/10.1109/TEC.2014.2297994
  9. K. Li, H. Zheng, L. Ma, T. Han, and Z. Liang, “Zero sequence circulating current inhibition of paralleled inverters based on Active Zero State PWM and PR control,” Automation of Electric Power Systems, Vol. 39, No. 15, pp. 126-131, Aug. 2015.
  10. X. Zhang, J. Chen, Y. Ma, Y. Wang, and D. Xu "Bandwidth expansion method for circulating current control in parallel three-phase PWM converter connection system," IEEE Trans. Power Electron., Vol. 29, No. 12, pp. 6847-6856, Dec. 2014. https://doi.org/10.1109/TPEL.2014.2311046
  11. R. Maheshwari, L. Bede, S. Munk-Nielsen, and G. Gohil, “Analysis and modelling of circulating current in two parallel-connected inverters,” IET Power Electronics, Vol. 8, No. 7, pp. 1273-1283, Jul. 2015. https://doi.org/10.1049/iet-pel.2014.0656
  12. D. Zhang, F. F. Wang, R. Burgos, and D. Boroyevich, “Common-mode circulating current control of paralleled interleaved three-phase two-level voltage-source converters with discontinuous space-vector modulation,” IEEE Trans. Power Electron., Vol. 26, No. 12, pp. 3925-3935, Dec. 2011. https://doi.org/10.1109/TPEL.2011.2131681
  13. J. Ewanchuk and J. Salmon, “Three-limb coupled inductor operation for paralleled multi-level three-phase voltage sourced inverters,” IEEE Trans. Ind. Electron., Vol. 60, No. 5, pp. 1979-1988, May 2013. https://doi.org/10.1109/TIE.2012.2221112
  14. T. P. Chen, “Circulating zero-sequence current control of parallel three-phase inverters,” IEE Proceedings - Electric Power Applications, Vol. 153, No. 2, pp. 282-288, Mar. 2006. https://doi.org/10.1049/ip-epa:20050231
  15. M. Narimani and G. Moschopoulos, “Three-phase multimodule VSIs using SHE-PWM to reduce zero-sequence circulating current,” IEEE Trans. Ind. Electron., Vol. 61, No. 4, pp. 1659-1668, Apr. 2014. https://doi.org/10.1109/TIE.2013.2267706
  16. T. P. Chen, “Dual-modulator compensation technique for parallel inverters using space-vector modulation,” IEEE Trans. Ind. Electron., Vol. 56, No. 8, pp. 3004-3012, Aug. 2009. https://doi.org/10.1109/TIE.2009.2022515
  17. C.-C. Hou, “A multicarrier PWM for parallel three-phase active front-end converters,” IEEE Trans. Power Electron., Vol. 28, No. 6, pp. 2753-2759, Jun. 2013. https://doi.org/10.1109/TPEL.2012.2220860
  18. X. Zhang, Z. Shao, F. Wang, P. Liu, and K. Ren, “Zero-sequence circulating current reduction for three-phase three-level modular photovoltaic grid-connected systems,” Proceedings of the CSEE, Vol. 33, No. 9, pp. 17-24, Mar. 2013.
  19. Z. Shao, X. Zhang, F. Wang, and R. Cao, “Modeling and elimination of zero-sequence circulating currents in parallel three-level t-type grid-connected inverters,” IEEE Trans. Power Electron., Vol. 30, No. 2, pp. 1050-1063, Feb. 2015. https://doi.org/10.1109/TPEL.2014.2309634
  20. K. Li, X. D. Wang, Z. Dong, X. Z. Wang, J. M. Guerrero, and J. C. Vasquez, "Elimination of zero sequence circulating current between parallel operating three-level inverters," in 42nd Annual Conference of the IEEE Industrial Electronics Society (IECON2016), Oct. 2016.
  21. F. Wang, “Sine-triangle versus space-vector modulation for three-level PWM voltage-source inverters,” IEEE Trans. Ind. Appl., Vol. 38, No. 2, pp. 500-506, Mar./Apr. 2002. https://doi.org/10.1109/28.993172
  22. H. Zhang, A. Von Jouanne, S. Dai, A. K. Wallace, and F. Wang, “Multilevel inverter modulation schemes to eliminate common-mode voltages,” IEEE Trans. Ind. Appl., Vol. 36, No. 6, pp. 1645-1653, Nov./Dec. 2000. https://doi.org/10.1109/28.887217
  23. M. R. Baiju, K. K. Mohapatra, R. S. Kanchan, and K. Gopakumar, “A dual two-level inverter scheme with common mode voltage elimination for an induction motor drive,” IEEE Trans. Power Electron., Vol. 19, No. 3, pp. 794-805, May 2004. https://doi.org/10.1109/TPEL.2004.826514
  24. K. Li, J. Zhao, W. Wu, M. Li, L. Ma, and G. Zhang, "Performance analysis of zero common mode voltage PWM techniques for three-level inverters," IET Power Electron., DOI: 10.1049/iet-pel.2016.0009.
  25. A. Pressman, Switching power supply design, 3rd ed. McGraw-Hill, Inc., 2009.