Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Strategy for the Seamless Mode Transfer of an Inverter in a Master-Slave Control Independent Microgrid

  • Wang, Yi (National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering) ;
  • Jiang, Hanhong (National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering) ;
  • Xing, Pengxiang (School of Electrical Engineering, Wuhan University)
  • Received : 2017.06.22
  • Accepted : 2017.09.27
  • Published : 2018.01.20
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Abstract

To enable a master-slave control independent microgrid system (MSCIMGS) to supply electricity continuously, the microgrid inverter should perform mode transfer between grid-connected and islanding operations. Transient oscillations should be reduced during transfer to effectively conduct a seamless mode transfer. This study uses a typical MSCIMGS as an example and improves the mode transfer strategy in three aspects: (1) adopts a status-tracking algorithm to improve the switching strategy of the outer loop, (2) uses the voltage magnitude and phase pre-synchronization algorithm to reduce transient shock at the time of grid connection, and (3) applies the hybrid-sensitivity $H_{\infty}$ robust controller instead of the current inner loop to improve the robustness of the controller. Simulations and experiments show that the proposed strategy is more practical than the traditional proportional-derivative control mode transfer and effective in reducing voltage and current oscillations during the transfer period.

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References

  1. F. H. Cai, D. Lu, Q. B. Lin, and W. Wang, “Control strategy design of grid-connected and stand-alone single-phase inverter for distributed generation,” J. Power Electron., Vol. 16, No. 5, pp. 1813-1820, Sep. 2016. https://doi.org/10.6113/JPE.2016.16.5.1813
  2. Y. Chen, J. B. Zhao, K. Q. Qu, and F. Li, “PQ control of micro grid inverters with axial voltage regulators,” J. Power Electron., Vol. 15, No. 6, pp. 1601-1608, Nov. 2015. https://doi.org/10.6113/JPE.2015.15.6.1601
  3. J. Xiang, F. F. Ji, H. Nian, J. M. Zhang, and H. Q. Deng, “Seamless transfer of single-phase utility interactive inverters with a synchronized output regulation strategy,” J. Power Electron., Vol. 16, No. 5, pp. 1821- 1832, Sep. 2016. https://doi.org/10.6113/JPE.2016.16.5.1821
  4. M. N. Arafat, S. Palle, Y. Sozer, and I. Husain, “Transition control strategy between standalone and grid-connected operations of voltage-source inverters,” IEEE Trans. Ind. Appl., Vol. 48, No. 5, pp. 1516-1525, Sep./Oct. 2012. https://doi.org/10.1109/TIA.2012.2210013
  5. K. Naheem, Y.-S. Choi, F. Mwasilu, H. H. Choi, and J.-W. Jung, “Design and stability analysis of a fuzzy adaptive SMC system for three-phase UPS inverter,” J. Power Electron., Vol. 14, No. 4, pp. 704-711, Jul. 2014. https://doi.org/10.6113/JPE.2014.14.4.704
  6. J. Kwon, S. Yoon, and S. Choi, "Indirect current control for seamless transfer of three-phase utility interactive inverters," IEEE Trans. Power Electron., Vol. 27, No. 2, pp. 773-781, Feb. 2012. https://doi.org/10.1109/TPEL.2011.2161335
  7. I. J. Balaguer, Q. Lei, S. Yang, U. Supatti, and F. Z. Peng, "Control for grid-connected and intentional islanding operations of distributed power generation," IEEE Trans. Ind. Electron., Vol. 58, No. 1, pp. 147-157, Jan. 2011. https://doi.org/10.1109/TIE.2010.2049709
  8. T.-V. Tran, T.-W. Chun, H.-H. Lee, H.-G. Kim, and E.-C. Nho, "PLL-based seamless transfer control between grid-connected and islanding modes in grid-connected inverters," IEEE Trans. Power Electron, Vol. 29, No.10, pp. 5218-5228, Oct. 2014. https://doi.org/10.1109/TPEL.2013.2290059
  9. R. M. S. Filho, P. F. Seixas, P. C. Cortizo, L. A. B. Torres, and A. F. Souza, "Comparison of three single-phase PLL algorithms for UPS applications," IEEE Trans. Ind. Electron., Vol. 55, No. 8, pp. 2923-2932, Aug. 2008. https://doi.org/10.1109/TIE.2008.924205
  10. O. Husev, A. Chub, E. Romero-Cadaval, C. Roncero- Clemente, and D. Vinnikov, “Voltage distortion approach for output filter design for off-grid and grid-connected pwm inverters,” J. Power Electron., Vol. 15, No. 1, pp. 278-287, Jan. 2015. https://doi.org/10.6113/JPE.2015.15.1.278
  11. X. T. Xu, H. Q. Wen, L. Jiang, and Y. H. Hu, “Hybrid control and protection scheme for inverter dominated microgrids,” J. Power Electron., Vol. 17, No. 3, pp. 744-755, May 2017. https://doi.org/10.6113/JPE.2017.17.3.744
  12. T. S. Hwang and S. Y. Park, "A seamless control strategy of a distributed generation inverter for the critical load safety under strict grid disturbances," IEEE Trans. Power Electron., Vol. 28, No. 10, pp. 4780-4790, Oct. 2013. https://doi.org/10.1109/TPEL.2012.2236578
  13. Z. W. Li, C. Z. Zang, P. Zeng, H. B. Yu, S. Li, and J. Bian, "Control of a grid-forming inverter based on sliding mode and mixed $H_2H_{\infty}$ control," IEEE Trans. Ind. Electron., Vol. 64, No. 5, pp. 3862-3872, May 2017. https://doi.org/10.1109/TIE.2016.2636798
  14. M. Dehghani, M. H. Khooban, T. Niknam, and S. M. R. Rafiei, “Time-varying sliding mode control strategy for multibus low-voltage microgrids with parallel connected renewable power sources in islanding mode,” J. Energy Eng., Vol. 142, No. 4, pp. 05016002, Dec. 2016. https://doi.org/10.1061/(ASCE)EY.1943-7897.0000344
  15. O. N. Almasi, V. Fereshtehpoor, M. H. Khooban, and F. Blaabjerg, "Analysis, control and design of a non-inverting buck-boost converter: A bump-less two-level T-S fuzzy PI control," ISA Transactions., Vol. 67, pp. 515-527, Mar. 2017. https://doi.org/10.1016/j.isatra.2016.11.009
  16. M. H. Khooban, T. Niknam, F. Blaabjerg, and T. Dragicevicb, "A new load frequency control strategy for micro-grids with considering electrical vehicles," Electric Power Systems Research., Vol. 143, pp. 585-598, Feb. 2017. https://doi.org/10.1016/j.epsr.2016.10.057
  17. M. R. Tavana, M.-H. Khooban, and T. Niknam, "Adaptive PI controller to voltage regulation in power systems: STATCOM as a case study," ISA Transactions., Vol. 66, pp. 325-334, Jan. 2017. https://doi.org/10.1016/j.isatra.2016.09.027
  18. M. A. Mahmud, M. J. Hossain, H. R. Pota, and A. M. T. Oo "Robust nonlinear distributed controller design for active and reactive power sharing in islanded microgrids," IEEE Trans. Energy Convers., Vol. 29, No. 4, pp. 893-903, Dec. 2014. https://doi.org/10.1109/TEC.2014.2362763
  19. S. T. Yang, Q. Lei, F. Z. Peng, and Z. M. Qian, "A robust control scheme for grid-connected voltage source inverters," IEEE Trans. Ind. Electron., Vol. 58, No. 1, pp. 202-212, Jan. 2011. https://doi.org/10.1109/TIE.2010.2045998
  20. X. T. Li, M. J. Chen, H. Shinohara, and T. Yoshihara, "Design of a low-order sensorless controller by robust $H_{\infty}$ control for boost converters," J. Power Electron., Vol. 16, No. 3, pp. 1025-1035, May 2016. https://doi.org/10.6113/JPE.2016.16.3.1025
  21. Y.-X. Dai, H. Wang, and G.-Q. Zeng, "Double closed-loop PI control of three-phase inverters by binary-coded extremal optimization," IEEE Access., Vol. 4, pp. 7621-7632, Oct. 2016. https://doi.org/10.1109/ACCESS.2016.2619691
  22. Y. A. R. I. Mohamed and A. A. Radwan, "Hierarchical control system for robust microgrid operation and seamless mode transfer in active distribution systems," IEEE Trans. Smart Grid, Vol. 2, No. 2, pp. 352-362, Jun. 2011. https://doi.org/10.1109/TSG.2011.2136362
  23. C. Wang, P. Yang, C. Ye, Y. W. Wang, and Z. R. Xu "Voltage control strategy for three/single phase hybrid multi-microgrid," IEEE Trans. Energy Convers., Vol. 31, No. 4, pp. 1498-1509, Dec. 2016. https://doi.org/10.1109/TEC.2016.2595860
  24. M. A. Mahmud, H. R. Pota, M. J. Hossain, and N. K. Roy, "Robust partial feedback linearizing stabilization scheme for three-phase grid-connected photovoltaic systems," IEEE J. Photovolt., Vol. 4, No. 1, pp. 423-431, Jan. 2014. https://doi.org/10.1109/JPHOTOV.2013.2281721
  25. T. Goya, T. Senjyu, E. Omine, A. Yona, N. Urasaki, and T. Funabashi, "Robust observer design for an isolated power system with model uncertainty using $H_{\infty}$norm," J. Power Electron., Vol. 10, No. 5, pp. 498-504, May 2010. https://doi.org/10.6113/JPE.2010.10.5.498