Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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ZSCC suppression method for parallel three-level inverters based on model predictive control with virtual location vector

  • Ling Mao (School of Electric Power Engineering, Shanghai University of Electric Power) ;
  • Yuankai Li (School of Electric Power Engineering, Shanghai University of Electric Power) ;
  • Chao Pan (School of Electric Power Engineering, Shanghai University of Electric Power) ;
  • Jianlin Yang (State Power Investment Corporation Limited Wind Power Innovation Center) ;
  • Qin Hu (School of Electric Power Engineering, Shanghai University of Electric Power) ;
  • Yuncong Zheng (School of Electric Power Engineering, Shanghai University of Electric Power) ;
  • Jinbin Zhao (School of Electric Power Engineering, Shanghai University of Electric Power)
  • Received : 2023.05.25
  • Accepted : 2023.11.24
  • Published : 2024.04.20
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Abstract

Parallel three-level neutral point clamped (3L-NPC) inverters are widely used in power conversion applications, such as new energy generation and high voltage inverters. However, the zero-sequence circulating current (ZSCC) between two inverters degrades the whole performance of the system. To suppress the ZSCC in parallel inverters and improve the quality of output current, this study proposes an MPC strategy based on the virtual location vector. First, to reduce the computational burden of MPC, the virtual location vector is constructed by the output current of two inverters so that the control of the parallel inverters is similar to that of a single inverter. Then, the virtual location vector is obtained by using the direct power control method. Finally, the sets of candidate voltage vectors for MPC are determined on the basis of this reference voltage vector and the magnitude of ZSCC. Moreover, the optimal vectors calculated by MPC are assigned to the two inverters. Compared with the traditional MPC strategy, the MPC strategy proposed in this study has better steady state and transient performance with less computational burden. The proposed method is validated in simulation and experimental platforms.

Keywords

Acknowledgement

This work was supported in part by the National Natural Science Foundation of China under Grant 52177184 and in part by the State Power Investment Corporation Limited Wind Power Innovation Center under Grant KYTC2021FD04.

References

  1. Zeng, H.C., Chen, D.L.: A voltage-fed single-stage multi-input inverter for hybrid wind/photovoltaic power generation system. J. Power Electron. 22(4), 593-602 (2022) https://doi.org/10.1007/s43236-022-00399-w
  2. Mathew, E.C., Das, A.: A new scheme for direct integration of offshore wind farms to MVDC rid with fault bypass feature. IEEE Trans. Ind. Appl. 58(5), 6496-6505 (2022) https://doi.org/10.1109/TIA.2022.3183563
  3. Zhong, Y., Li, W.C., Zhou, L., Deng, C., Han, J.: Modulation method of parallel interleaved three-level inverter considering neutral point potential and phase current balance. J. Power Electron. 23(2), 241-251 (2022)
  4. Shahin, A., Moussa, H., Forrisi, I., Martin, J.-P., Nahid-Mobarakeh, B., Pierfederici, S.: Reliability improvement approach based on fatness control of parallel-connected inverters. IEEE Trans. Power Electron. 32(1), 681-692 (2017) https://doi.org/10.1109/TPEL.2016.2527778
  5. Zhang, H.S., Zhu, S.J., Jin, D., Wang, A., Jiang, J.J., Yu, L.L.: Unified coordinated control strategy for two parallel inverters tpow-pmsm system. J. Power Electron. 22(2), 243-253 (2021)
  6. Ge, B.M., Lu, X., Yu, X.H., Zhang, M.S., Peng, F.Z.: Multiphase-leg coupling current balancer for parallel operation of multiple mw power modules. IEEE Trans. Ind. Electron. 61(3), 1147-1157 (2014) https://doi.org/10.1109/TIE.2013.2258307
  7. Dissanayake, A.M., Ekneligoda, N.C.: Transient optimization of parallel connected inverters in islanded ac microgrids. IEEE Trans. Smart Grid. 10(5), 4951-4961 (2019) https://doi.org/10.1109/TSG.2018.2871413
  8. Hamza, D., Qiu, M., Jain, P.K.: Application and stability analysis of a novel digital active emi filter used in a grid-tied pv micro-inverter module. IEEE Trans. Power Electron. 28(6), 2867-2874 (2013) https://doi.org/10.1109/TPEL.2012.2219074
  9. Li, Q., Jiang, D., Liu, Z.C., Shen, Z.W., Zhang, Y.C.: A phase-shifted zero-cm pwm for circulating current reduction in two paralleled inverters with coupled inductors. IEEE Trans. Transp. Electrif. 6(1), 95-104 (2020) https://doi.org/10.1109/TTE.2019.2960160
  10. Jin, X.L., Liu, S.F., Shi, W., Yang, H., Zhao, R.X.: Novel space vector-based pwm strategy with minimal circulating current and line-current ripple for two parallel interleaved inverters. J. Power Electron. 21(2), 308-320 (2020)
  11. Jiang, C.P., Quan, Z.Y., Zhou, D.H., Li, Y.W.: A centralized CB-MPC to suppress low-frequency zscc in modular parallel converters. IEEE Trans. Ind. Electron. 68(4), 2760-2771 (2021) https://doi.org/10.1109/TIE.2020.2982111
  12. Shao, Z.P., Zhang, X., Wang, F.S., Cao, R.X.: Modeling and elimination of zero-sequence circulating currents in parallel three-level t-type grid-connected inverters. IEEE Trans. Power Electron. 30(2), 1050-1063 (2015) https://doi.org/10.1109/TPEL.2014.2309634
  13. Liu, X., Liu, T., Chen, A., Xing, X.Y., Zhang, C.H.: Circulating current suppression for paralleled three-level t-type inverters with online inductance identification. IEEE Trans. Ind. Appl. 57(5), 5052-5062 (2021) https://doi.org/10.1109/TIA.2021.3089115
  14. Qin, C.W., Zhang, C.H., Chen, A., Xing, X.Y., Zhang, G.X.: Circulating current suppression for parallel three-level inverters under unbalanced operating conditions. IEEE J. Emerg. Sel. Top. Power Electron. 7(1), 480-492 (2019) https://doi.org/10.1109/JESTPE.2018.2813390
  15. Liang, Z.G., Lin, X.C., Qiao, X.S., Kang, Y., Gao, B.F.: A coordinated strategy providing zero-sequence circulating current suppression and neutral-point potential balancing in two parallel three-level converters. IEEE J. Emerg Sel. Top. Power Electron. 6(1), 363-376 (2018) https://doi.org/10.1109/JESTPE.2017.2722005
  16. Zhang, C.H., Zhang, R., Xing, X.Y., Li, X.Y.: Circulating current mitigation and harmonic current compensation for multifunction parallel three-level four-leg converters. IEEE J. Emerg. Sel. Top. Power Electron. 10(3), 2805-2818 (2022) https://doi.org/10.1109/JESTPE.2021.3072437
  17. Vazquez, S., Rodriguez, J., Rivera, M., Franquelo, L.G., Norambuena, M.: Model predictive control for power converters and drives: advances and trends. IEEE Trans. Ind. Electron. 64(2), 935-947 (2017) https://doi.org/10.1109/TIE.2016.2625238
  18. Geyer, T., Papafotiou, G., Morari, M.: Model predictive direct torque control-Part i: concept, algorithm, and analysis. IEEE Trans. Ind. Electron. 56(6), 1894-1905 (2009) https://doi.org/10.1109/TIE.2008.2007030
  19. Lin, H., Liu, J.X., Shen, X.N., Leon, J.I., Vazquez, S., Alcaide, A.M., Wu, L.G., Franquelo, L.G.: Fuzzy sliding-mode control for three-level npc afe rectifers: a chattering alleviation approach. IEEE Trans. Power Electron. 37(10), 11704-11715 (2022) https://doi.org/10.1109/TPEL.2022.3174064
  20. Yin, Y.F., Liu, J.X., Sanchez, J.A., Wu, L.G., Vazquez, S., Leon, J.I., Franquelo, L.G.: Observer-based adaptive sliding mode control of npc converters: an rbf neural network approach. IEEE Trans. Power Electron. 34(4), 3831-3841 (2019) https://doi.org/10.1109/TPEL.2018.2853093
  21. Wu, L.G., Liu, J.X., Vazquez, S., Mazumder, S.K.: Sliding mode control in power converters and drives: A review. IEEE/CAA J. Autom. Sin. 9(3), 392-406 (2022) https://doi.org/10.1109/JAS.2021.1004380
  22. Liu, J.X., Gao, Y.B., Su, X.J., Wack, M., Wu, L.G.: Disturbance-observer-based control for air management of pem fuel cell systems via sliding mode technique. IEEE Trans. Control Syst. Technol. 27(3), 1129-1138 (2019) https://doi.org/10.1109/TCST.2018.2802467
  23. Liu, J.X., Shen, X.N., Alcaide, A.M., Yin, Y.F., Leon, J.I., Vazquez, S., Wu, L.G., Franquelo, L.G.: Sliding mode control of grid-connected neutral-point-clamped converters via high-gain observer. IEEE Trans. Ind. Electron. 69(4), 4010-4021 (2022)
  24. Sun, X.D., Xue, M.Z., Cai, Y.F., Tian, X., Jin, Z.J., Chen, L.: Adaptive ecms based on ef optimization by model predictive control for plug-in hybrid electric buses. IEEE Trans. Transp. Electrif.. 9(2), 2153-2163 (2023) https://doi.org/10.1109/TTE.2022.3212866
  25. Xu, W., Elmorshedy, M.F., Liu, Y., Islam, M.R., Allam, S.M.: Finite-set model predictive control based thrust maximization of linear induction motors used in linear metros. IEEE Trans. Veh. Technol. 68(6), 5443-5458 (2019) https://doi.org/10.1109/TVT.2019.2909785
  26. Yuan, X., Zhang, S., Zhang, C.N.: Nonparametric predictive current control for pmsm. IEEE Trans. Power Electron. 35(9), 9332-9341 (2020) https://doi.org/10.1109/TPEL.2020.2970173
  27. Jin, T., Huang, Y.S., Lin, Y.Z., Daniel Legrand, M.-N.: Model predictive current control based on virtual VV method for parallel three-level inverters. IEEE J. Emerg. Sel. Top. Power Electron. 9(5), 6049-6058 (2021) https://doi.org/10.1109/JESTPE.2021.3061688
  28. Wang, X.D., Zou, J.X., Peng, Y., Xie, C., Li, K., Guerrero, Z.J.M.: Elimination of zero sequence circulating currents in paralleled three-level t-type inverters with a model predictive control strategy. IET Power Electron. 11(15), 2573-2581 (2018) https://doi.org/10.1049/iet-pel.2018.5324
  29. Liu, T., Chen, A., Huang, Y.P.: Multivector model predictive current control for paralleled three-level t-type inverters with circulating current elimination. IEEE Trans. Ind. Electron. 70(8), 8042-8052 (2023) https://doi.org/10.1109/TIE.2022.3208607
  30. Wang, F., Li, Z.J., Tong, X.R., Chen, L.: Modeling, analysis and evaluation of modified model predictive control method for parallel three-level simplified neutral point clamped inverters. IEEE Access 7, 185349-185359 (2019) https://doi.org/10.1109/ACCESS.2019.2961054
  31. Xing, X.Y., Chen, H.: A fast-processing predictive control strategy for common-mode voltage reduction in parallel three-level inverters. IEEE J. Emerg. Sel. Top. Power Electron. 9(1), 316-326 (2021) https://doi.org/10.1109/JESTPE.2019.2956315
  32. 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