Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Three-level boost inverter with capacitor voltage self-balancing and high conversion efficiency for low DC voltage systems

  • Bihua Hu (School of Automation and Electronic Information, Xiangtan University) ;
  • Zhaohong Tang (School of Automation and Electronic Information, Xiangtan University) ;
  • Zhi Zhang (College of Electronic Engineering, Dongguan University of Technology) ;
  • Jinqing Linghu (School of Mechanical and Electrical Engineering, Guizhou Normal University) ;
  • Jihong Qian (Weisheng Energy Industry Technology Co., Ltd.) ;
  • Xiangyun Qin (School of Automation and Electronic Information, Xiangtan University) ;
  • Bumin Meng (School of Automation and Electronic Information, Xiangtan University) ;
  • Rong Han (TBEA Hengyang Transformer Co., Ltd.)
  • Received : 2023.02.10
  • Accepted : 2023.06.26
  • Published : 2023.12.20
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Abstract

Currently, Z-source networks are widely employed to extend the output-voltage range of inverters operating at a low voltage DC source. However, these inverters are troubled by low power-conversion efficiency and an obvious current distortion due to the copper losses and core losses of the inductors. In addition, they have limited voltage levels. In this paper, a novel boost network composed of two power switches, two capacitors, and two diodes is proposed to overcome these shortcomings. Meanwhile, a corresponding modulation strategy is also set forth to achieve capacitor voltage self-balancing and to regulate the output AC voltage. Moreover, by adding more switched-capacitor cells, the range of the output voltage can be further improved, and the max DC/AC-voltage conversion ratio of the inverter with n cells is √3(n+1)/3. At last, an inverter prototype with a 1 kW power rating is built, and the obtained results demonstrate that this inverter possesses the following superiorities: a wider range of output voltage, automatic balancing of the capacitor voltage, less current distortion, and high-efficiency power conversion.

Keywords

Acknowledgement

This work was supported in part by the Innovation Platform and Talent Program of Hunan Province under Grant 2021RC2095, in part by Natural Science Foundation of China under Grant 62003288, in part by the Guangdong Basic and Applied Basic Research Foundation under Grant 2022A1515140009, in part by Science and Technology Research Project of Guizhou Province under Grant Qiankehe Basic-ZK[2022]General 17, and in part by the Science and Technology Innovation Program of Hunan Province under Grant 2022GK2050.

References

  1. Wang, A., Zhang, H., Jiang, J., et al.: Predictive direct torque control of permanent magnet synchronous motors using deadbeat torque and flux control. J. Power Electron. 23, 264-273 (2023) https://doi.org/10.1007/s43236-022-00542-7
  2. Zhong, Y., Li, W., Zhou, L., et al.: Modulation method of parallel interleaved three-level inverter considering neutral point potential and phase current balance. J. Power Electron. 23, 241-251 (2023) https://doi.org/10.1007/s43236-022-00568-x
  3. Gupta, M., Venkataraman, G.: A DC-to-three-phase boost-buck inverter with stored energy modulation and a tiny DC-link capacitor. IEEE Trans. Ind. Appl. 53, 1280-1288 (2017) https://doi.org/10.1109/TIA.2016.2640198
  4. Kan, S., Ruan, X., Huang, X., Dang, H.: Second harmonic current reduction for flying capacitor clamped boost three-level converter in photovoltaic grid-connected inverter. IEEE Trans. Power Electron. 36, 1669-1679 (2021) https://doi.org/10.1109/TPEL.2020.3007806
  5. Yang, F., Ge, H., Yu, Z., Li, Y., Wu, H.: Topology and control of four-quadrant dual-DC-port dual-buck inverters for semi-two-stage DC-AC power conversion. IEEE Trans Ind. Electron. 68, 10718-10729 (2021) https://doi.org/10.1109/TIE.2020.3034866
  6. Peng, F.Z.: Z-source inverter. IEEE Trạns. Ind. Appl. 39, 504-510 (2003) https://doi.org/10.1109/TIA.2003.808920
  7. Siwakoti, Y.P., Blaabjerg, F., Galigekere, V.P., Ayachit, A., Kazimierczuk, M., K.: A Y-source impedance network. IEEE Trans. Power Electron. 31, 8081-8087 (2014)
  8. Mo, W., Loh, P.C., Blaabjerg, F.: Asymmetrical Γ-source inverters. IEEE Trans. Ind. Electron. 61, 637-647 (2014) https://doi.org/10.1109/TIE.2013.2253066
  9. Jena, K., Panigrahi, C.K., Gupta, K.K., et al.: Generalized switched-capacitor multilevel inverter topology with self-balancing capacitors. J. Power Electron. 22, 1617-1626 (2022) https://doi.org/10.1007/s43236-022-00456-4
  10. Siddique, M.D., Mekhilef, S., Shah, N.M., et al.: New switched-capacitor-based boost inverter topology with reduced switch count. J. Power Electron. 20, 926-937 (2020) https://doi.org/10.1007/s43236-020-00102-x
  11. Janabi, A., Wang, B.: Switched-capacitor voltage boost converter for electric and hybrid electric vehicle drives. IEEE Trans. Power Electron. 35, 5615-5624 (2020)
  12. Tran, T.T., Nguyen, M.K., Duong, T.D., Choi, J.H., Lim, Y.C., Zare, F.: A switched-capacitor-voltage-doubler based boost inverter for common-mode voltage reduction. IEEE Access 7, 98618-98629 (2019) https://doi.org/10.1109/ACCESS.2019.2930122
  13. Nguyen, M.K., Duong, T.D., Lim, Y.C., Choi, J.H.: High voltage gain quasi-switched boost inverters with low input current ripple. IEEE Trans Ind. Imformat. 15, 4857-4866 (2019) https://doi.org/10.1109/TII.2018.2806933
  14. Nguyen, M.K., Duong, T.D., Lim, Y.C., Kim, Y.G.: Switched-capacitor quasi-switched boost inverters. IEEE Trans. Ind. Electron. 65, 5105-5113 (2018) https://doi.org/10.1109/TIE.2017.2772179
  15. Wang, W., Wang, P., Li, B., et al.: A bidirectional DC-DC converter with high voltage conversion ratio and zero ripple current for battery energy storage system. IEEE Trans. Power Electron. 36, 8012-8027 (2021) https://doi.org/10.1109/TPEL.2020.3048043
  16. Erickson, R., Erickson, W., Maksimovic, D.: Fundamental of power electronic. Springer, Boston (2001)
  17. Rashid, M.H.: Power Electronics Handbook. Butterworth-Heinemann, Oxford (2018)