Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
권호 표지
DOI QR코드

DOI QR Code

Improved model predictive control scheme for AC/DC matrix converters by considering input filter power ripple under imbalanced grid voltage conditions

  • Received : 2020.05.25
  • Accepted : 2020.08.23
  • Published : 2020.11.20
⟨ Previous Next ⟩

Abstract

The power ripple in the input filter is normally ignored in the conventional model predictive control scheme (MPC) of an AC/DC matrix converter under imbalanced grid voltage conditions. Unfortunately, this power ripple causes output power and current ripples. Some methods compensate this power ripple to obtain a ripple-free output current. However, these methods are generally complicated due to the increased computational and control burden or the use of a digital filter to estimate the power ripple. Moreover, the compensation of power ripple results in current distortion on the grid side, which has yet to be fully addressed. This paper presents an improved MPC scheme to simultaneously compensate input filter power ripple and reduce grid current distortion under imbalanced grid voltage conditions. The power ripple is calculated based on the grid voltage and its 90 electrical degrees delay signal, which makes the implementation simple without grid voltage components extraction or digital filter design. Furthermore, a closed-loop current controller is proposed to reduce the harmonic distortion of the grid current. The feasibility of the proposed MPC scheme is confirmed by both simulation and experimental results.

Keywords

Acknowledgement

This work was supported in part by the NRF of Korea Grant under Grant NRF-2018R1D1A1A09081779 and in part by the KETEP and the MOTIE under Grant 20194030202310.

References

  1. You, K., Xiao, D., Rahman, M.F., Uddin, M.N.: Applying reduced general direct space vector modulation approach of ac-ac matrix converter theory to achieve direct power factor controlled three-phase ac-dc matrix rectifier. IEEE Trans. Ind. Appl. 50(3), 2243-2257 (2014) https://doi.org/10.1109/TIA.2013.2285956
  2. Nguyen, T., Lee, H.: An enhanced control strategy for AC-DC matrix converters under unbalanced grid voltage. IEEE Trans. Ind. Electron 67(3), 1718-1727 (2020) https://doi.org/10.1109/tie.2019.2907452
  3. Sayed, M.A., Suzuki, K., Takeshita, T., Kitagawa, W.: PWM switching technique for three-phase bidirectional grid-tie DC-AC-AC converter with high-frequency isolation. IEEE Trans. Power Electron 33(1), 845-858 (2018) https://doi.org/10.1109/TPEL.2017.2668441
  4. Feng, B., Lin, H., Wang, X.: Modulation and control of ac/dc matrix converter for battery energy storage application. IET Power Electron 8(9), 1583-1594 (2015) https://doi.org/10.1049/iet-pel.2014.0426
  5. Varajao, D., Araujo, R.E., Miranda, L.M., Lopes, J.A.P.: Modulation strategy for a single-stage bidirectional and isolated AC-DC matrix converter for energy storage systems. IEEE Trans. Ind. Electron 65(4), 3458-3468 (2018) https://doi.org/10.1109/tie.2017.2752123
  6. Fang, F., Li, Y.W.: Modulation and control method for bidirectional isolated AC/DC matrix based converter in hybrid AC/DC microgrid. IEEE Energy Convers. Cong. Expos. (ECCE) 2017, 37-43 (2017)
  7. Su, M., Wang, H., Sun, Y., Yang, J., Xiong, W., Liu, Y.: AC/DC matrix converter with an optimized modulation strategy for V2G applications. IEEE Trans. Power Electron 28(12), 5736-5745 (2013) https://doi.org/10.1109/TPEL.2013.2250309
  8. Das, D., Weise, N., Basu, K., Baranwal, R., Mohan, N.: A bidirectional soft-switched DAB-based single-stage three-phase AC-DC converter for V2G application. IEEE Trans. Transp. Electrif. 5(1), 186-199 (2019) https://doi.org/10.1109/tte.2018.2886455
  9. Feng, B., Lin, H.: Finite control set model predictive control of AC/DC matrix converter for grid-connected battery energy storage application. J. Power Electron 15(4), 1006-1017 (2015) https://doi.org/10.6113/JPE.2015.15.4.1006
  10. Nguyen, T., Nguyen, H., Nguyen, T.D., Lee, H.: Simplified model predictive control for AC/DC matrix converters with fixed switching frequency," in 2019 10th international conference on power electronics and ECCE Asia (ICPE 2019-ECCE Asia). pp. 1-6. (2019)
  11. Fang, F. Tian, H., Li, Y.:Finite control set model predictive control for AC-DC matrix converter with virtual space vectors. IEEE J Emerg Sel Top Power Electron. p. 1 (2019)
  12. Rivera, M., Rojas, C., Rodriguez, J., Espinoza, J.: Methods of source current reference generation for predictive control in a direct matrix converter. IET Power Electron 6(5), 894-901 (2013) https://doi.org/10.1049/iet-pel.2012.0357
  13. Rivera, M., Uribe, C., Tarisciotti, L., Wheeler, P., Zanchetta, P: Predictive control of an indirect matrix converter operating at fixed switching frequency and unbalanced AC-supply. In 2015 IEEE international symposium on predictive control of electrical drives and power electronics (PRECEDE). pp. 38-43 (2015)
  14. Rojas, C., et al.: Predictive control of a direct matrix converter operating under an unbalanced AC source. In 2010 IEEE international symposium on industrial electronics. pp. 3159-3164. (2010)
  15. Nguyen, T., Lee, H.: Simplified model predictive control for AC/DC matrix converters with active damping function under unbalanced grid voltage. IEEE J. Emerg. Sel. Top. Power Electron. p. 1. (2019)
  16. Zhang, Y., Liu, J., Yang, H., Gao, J.: Direct power control of pulsewidth modulated rectifiers without DC voltage oscillations under unbalanced grid conditions. IEEE Trans. Ind. Electron. 65(10), 7900-7910 (2018) https://doi.org/10.1109/tie.2018.2807421
  17. Zhang, Y., Jiao, J., Liu, J.: Direct power control of PWM rectifiers with online inductance identifcation under unbalanced and distorted network conditions. IEEE Trans. Power Electron. 34(12), 12524-12537 (2019) https://doi.org/10.1109/tpel.2019.2908908
  18. Zhang, Y., Jiao, J., Liu, J., Gao, J.: Direct power control of PWM rectifier with feedforward compensation of DC-bus voltage ripple under unbalanced grid conditions. IEEE Trans. Ind. Appl. 55(3), 2890-2901 (2019) https://doi.org/10.1109/tia.2019.2896063
  19. Wang, Z., Wu, B., Xu, D., Cheng, M., Xu, L.: DC-link current ripple mitigation for current-source grid-connected converters under unbalanced grid conditions. IEEE Trans. Ind. Electron. 63(8), 4967-4977 (2016) https://doi.org/10.1109/TIE.2016.2554080
  20. Feng, S., Lei, J., Zhao, J., Chen, W., Deng, F.: Improved reference generation of active and reactive power for matrix converter with model predictive control under input disturbances. IEEE Access 7, 97001-97012 (2019) https://doi.org/10.1109/access.2019.2929792
  21. Nguyen, T. L., Nguyen, T. D., Lee, H. H.: Resonant compensators to suppress input current harmonics for AC/DC matrix converters under unbalanced input voltages. In IECON 2017-43rd annual conference of the IEEE industrial electronics society. pp. 7354-7359. (2017)
  22. Guo, X., Liu, W., Lu, Z.: Flexible power regulation and currentlimited control of the grid-connected inverter under unbalanced grid voltage faults. IEEE Trans. Ind. Electron. 64(9), 7425-7432 (2017) https://doi.org/10.1109/TIE.2017.2669018
  23. Jin, N., Gan, C., Guo, L.: Predictive control of bidirectional voltage source converter with reduced current harmonics and flexible power regulation under unbalanced grid. IEEE Trans. Energy Convers. 33(3), 1118-1131 (2018) https://doi.org/10.1109/tec.2017.2781692
  24. Cortes, P., Rodriguez, J., Silva, C., Flores, A.: Delay compensation in model predictive current control of a three-phase inverter. IEEE Trans. Ind. Electron. 59(2), 1323-1325 (2012) https://doi.org/10.1109/TIE.2011.2157284
  25. "IEEE Recommended Practice and Requirements for Harmonic Control in Electric Power Systems. IEEE Std 519-2014 (Revision IEEE Std 519-1992), pp. 1-29. 2014