Journal of Power Electronics

  • 제22권8호
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  • Pages.1265-1278
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  • 2022
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  • 1598-2092(pISSN)
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  • 2093-4718(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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DOI QR코드

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Capacitor-less modular multilevel converter with sliding mode control for MV adjustable-speed motor drives

  • 투고 : 2021.12.07
  • 심사 : 2022.06.09
  • 발행 : 2022.08.20
⟨ 이전 논문 다음 논문 ⟩

초록

Medium-voltage (MV) motor drives have become an appealing application for modular multilevel converters (MMCs). Starting and operation at low speeds result in wide fluctuations of the low-frequency ripple components in the sub-module (SM) capacitors DC link voltages, which can adversely affect system performance and system lifetime. A solution for this problem is to replace the low-frequency (LF) SM capacitor with a power decoupling circuit (PDC) that is independent from the converter line frequency. In this paper, a power decoupling approach based on the flux cancelation method is proposed. A three-winding high-frequency transformer (HFT) is employed to magnetically couple and cancel the three-phase symmetrical ripple power. However, this approach has two main challenges. (1) The ripple powers through the HFT are a function of the value of the leakage inductances. (2) Different leakage inductances and ripple power unbalance between phases cause unequal ripple voltages. As a result, phase-shift ripple rejection control is needed. Conventional liner controllers have several problems, such as bandwidth limitations, stability margins, and slow dynamics near-zero-speed operation. In addition, linear controllers are designed for a specific ripple frequency. In this paper, a frequency-independent ripple rejection sliding mode controller (SMC) is proposed to overcome the limitations of linear controllers. The SMC is applied to pass the SM capacitor voltage ripple into the HFT. Thus, the ripple is canceled out in the HFT magnetic core regardless of the converter line frequency. The proposed control is suitable for adjustable-speed applications. The performance of the proposed scheme is verified via simulation and experimental tests.

키워드

과제정보

This work was supported by the National Research Foundation of Korean (NRF) grant funded by the Korea government (MIST) (No. 2020R1F1A1069426).

참고문헌

  1. Le, D.D., Lee, D.-C.: Current stress reduction and voltage total harmonic distortion improvement of flying-capacitor modular multilevel converters for AC machine drive applications. IEEE Trans. Ind. Electron. 69(1), 90-100 (2022) https://doi.org/10.1109/TIE.2021.3050394
  2. Perez, M.A., Ceballos, S., Konstantinou, G., Pou, J., Aguilera, R.P.: Modular multilevel converters: recent achievements and challenges. IEEE Open J. Ind. Electron. Soc. 2, 224-239 (2021) https://doi.org/10.1109/OJIES.2021.3060791
  3. Ali, S., Ling, Z., Tian, K., Huang, Z.: Recent advancements in submodule topologies and applications of MMC. IEEE J. Emerg. Select. Top. Power Electron. 9(3), 3407-3435 (2021) https://doi.org/10.1109/JESTPE.2020.2990689
  4. Ke, Z., et al.: Capacitor voltage ripple estimation and optimal sizing of modular multi-level converters for variable-speed drives. IEEE Trans. Power Electron. 35(11), 12544-12554 (2020) https://doi.org/10.1109/tpel.2020.2988403
  5. Du, S., Wu, B., Tian, K., Zargari, N.R., Cheng, Z.: An active cross connected modular multilevel converter (AC-MMC) for a medium voltage motor drive. IEEE Trans. Ind. Electron. 63(8), 4707-4717 (2016) https://doi.org/10.1109/TIE.2016.2547875
  6. Du, S., Wu, B., Zargari, N., Cheng, Z.: A fying-capacitor modular multilevel converter (FC-MMC) for medium-voltage motor drive. IEEE Trans. Power Electron. 32(3), 2081-2089 (2017) https://doi.org/10.1109/TPEL.2016.2565510
  7. Kong, Z., Huang, X., Wang, Z., Xiong, J., Zhang, K.: Active power decoupling for submodules of modular multilevel converter. IEEE Trans. Power Electron. 33(1), 125-136 (2018) https://doi.org/10.1109/TPEL.2017.2661539
  8. Tang, Y., Chen, M., Ran, L.: A compact MMC submodule structure with reduced capacitor size using the stacked switched capacitor architecture. IEEE Trans. Power Electron. 31(10), 6920-6936 (2016) https://doi.org/10.1109/TPEL.2015.2511189
  9. Diab, M.S., Massoud, A.M., Ahmed, S., Williams, B.W.: A dual modular multilevel converter with high-frequency magnetic links between submodules for MV open-end stator winding machine drives. IEEE Trans. Power Electron. 33(6), 5142-5159 (2018) https://doi.org/10.1109/tpel.2017.2735195
  10. Diab, M.S., Massoud, A.M., Ahmed, S., Williams, B.W.: A modular multilevel converter with ripple-power decoupling channels for three-phase MV adjustable-speed drives. IEEE Trans. Power Electron. 34(5), 4048-4063 (2019) https://doi.org/10.1109/tpel.2018.2858003
  11. P.J. Hu, A. Ahmed, M.S. Irfan, Multi-phase inverter using independent-type multi H-bridge, Korean Patent, 1018625170000, May, 05.2018 available at database of http://engpat.kipris.or.kr/engpat/searchLogina.do?next=MainSearch.
  12. C. Liu, J.S. Lai, Low frequency current ripple reduction technique with active control in a fuel cell power system with inverter load. In: 2005 IEEE 36th Power Electronics Specialists Conference, pp. 2905-2911. IEEE, 2005.
  13. Wang, J., Ji, B., Lu, X., Deng, X., Zhang, F., Gong, C.: Steady-state and dynamic input current low-frequency ripple evaluation and reduction in two-stage single-phase inverters with back current gain model. IEEE Trans. Power Electron. 39(8), 4247-4260 (2014)
  14. Zhang, L., Ren, X., Ruan, X.: A bandpass filter incorporated into the inductor current feedback path for improving dynamic performance of the front-end DC-DC converter in two-stage inverter. IEEE Trans. Ind. Elect. 61(5), 2316-2325 (2014) https://doi.org/10.1109/TIE.2013.2267704
  15. Cao, L., Loo, K.H., Lai, Y.M.: Systematic derivation of a family of output-impedance shaping methods for power converters-A case study using fuel cell-battery-powered single-phase inverter system. IEEE Trans. Power Electron. 30(10), 5854-5869 (2015) https://doi.org/10.1109/TPEL.2014.2369573
  16. Cao, L., Loo, K.H., Lai, Y.M.: Output-impedance shaping of bidirectional DAB DC-DC converter using double-proportional-integral feedback for near-ripple-free DC bus voltage regulation in renewable energy systems. IEEE Trans. Power Electron. 31(3), 2187-2199 (2016) https://doi.org/10.1109/TPEL.2015.2433535
  17. Kousalya, V., Rai, R., Singh, B.: Sliding model-based predictive torque control of induction motor for electric vehicle. IEEE Trans. Ind. Appl. 58(1), 742-752 (2022) https://doi.org/10.1109/TIA.2021.3131973
  18. Chakraborty, R., Samantaray, J., Dey, A., Chakrabarty, S.: Capacitor voltage estimation of MMC using a discrete-time sliding mode observer based on discrete model approach. IEEE Trans. Ind. Appl. 58(1), 494-504 (2022) https://doi.org/10.1109/TIA.2021.3124982
  19. Mohanty, P.R., Panda, A.K.: Fixed-frequency sliding-mode control scheme based on current control manifold for improved dynamic performance of boost PFC converter. IEEE J. Emerg. Sel. Top Power Electron. 5(1), 576-586 (2017) https://doi.org/10.1109/JESTPE.2016.2585587
  20. Chincholkar, S.H., Chan, C.-Y.: Design of fixed-frequency pulse width-modulation-based sliding-mode controllers for the quadratic boost converter. IEEE Trans. Circuits Syst. II Express Briefs 64(1), 51-55 (2017) https://doi.org/10.1109/TCSII.2016.2546902
  21. Deivasundari, P., Uma, G., Poovizhi, R.: Analysis and experimental verification of Hopf bifurcation in a solar photovoltaic powered hysteresis current-controlled cascaded-boost converter. IET Power Electron 6(4), 763-773 (2013) https://doi.org/10.1049/iet-pel.2012.0437
  22. Fu, D., Zhao, X., Zhu, J.: A novel robust super-twisting nonsingular terminal sliding mode controller for permanent magnet linear synchronous motors. IEEE Trans. Power Electron. 37(3), 2936-2945 (2022) https://doi.org/10.1109/TPEL.2021.3119029
  23. Ahmed, A., Ganeshkumar, P., Park, J.-H., Lee, H.: FPGA-based centralized controller for multiple PV generators tied to the DC bus. J. Power Electron. 14(4), 733-741 (2014) https://doi.org/10.6113/JPE.2014.14.4.733
  24. Ahmed, A., Li, R.: Precise detection and elimination of grid injected DC from single phase inverters. Int. J. Precis. Eng. Manuf. 13(8), 1341-1347 (2012) https://doi.org/10.1007/s12541-012-0177-1
  25. Tawfk, M.A., Ahmed, A., Park, J.-H.: Double boost power-decoupling topology suitable for low-voltage photovoltaic residential applications using sliding-mode impedance-shaping controller. J. Power Electron. 19(4), 881-893 (2019) https://doi.org/10.6113/JPE.2019.19.4.881
  26. Yazdani, A., Iravani, R.: Voltage-Sourced Converters in Power Systems, vol. 34. Wiley, Hoboken (2010)
  27. Trabelsi, R., Khedher, A., Mimouni, M.F., M'sahli, F.: Backstepping control for an induction motor using an adaptive sliding rotor-fux observer. Electr. Power Syst. Res. 93, 1-15 (2012) https://doi.org/10.1016/j.epsr.2012.06.004
  28. https://www.tdk-electronics.tdk.com/inf/20/50/ds/B2562_.pdf
  29. https://www.cde.com/resources/catalogs/944U.pdf
  30. Hurley, W.G., Woelfe, W.H.: Transformers and Inductors for Power Electronics-Theory, Design, and Applications. Wiley, New York (2013)