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Impedance Matching Based Control for the Resonance Damping of Microgrids with Multiple Grid Connected Converters

  • Tan, Shulong (Department of Automation, Tsinghua University) ;
  • Geng, Hua (Department of Automation, Tsinghua University) ;
  • Yang, Geng (Department of Automation, Tsinghua University)
  • Received : 2016.05.18
  • Accepted : 2016.08.10
  • Published : 2016.11.20

Abstract

This paper presents an impedance-matching-based control scheme for the harmonic resonance damping of multiple grid-connected-converters (GCCs) with LCL filters. As indicated in this paper, harmonic resonance occurs if a GCC possesses an output impedance that is not matched with the rest of the network in some specific frequency bands. It is also revealed that the resonance frequency is associated with the number of GCCs, the grid impedance and even the capacitive loads. By controlling the grid-side current instead of the converter-side current, the critical LCL filter is restricted as an internal component. Thus, the closed-loop output impedance of the GCC within the filter can be configured. The proposed scheme actively regulates the output impedance of the GCC to match the impedance of the external network, based on the detected resonance frequency. As a result, the resonance risk of multiple GCCs can be avoided, which is beneficial for the plug-and-play property of the GCCs in microgrids. Simulation and experimental results validate the effectiveness of the proposed method.

Keywords

References

  1. F. Blaabjerg, R. Teodorescu, M. Liserre, and A. V. Timbus, "Overview of control and grid synchronization for distributed power generation systems," IEEE Trans. Ind. Electron., Vol. 53, No. 5, pp. 1398-1409, Oct. 2006. https://doi.org/10.1109/TIE.2006.881997
  2. F. Wang, J. L. Duarte, and M. A. M. Hendrix, "Grid-interfacing converter systems with enhanced voltage quality for microgrid application-concept and implementation," IEEE Trans. Power Electron., Vol. 26, No. 12, pp. 3501-3513, Dec. 2011. https://doi.org/10.1109/TPEL.2011.2147334
  3. J. M. Guerrero, J. C. Vasquez, J. Matas, L.-D. Vicuna, and M. Castilla, "Hierarchical control of droop-controlled AC and DC microgrids - A general approach toward standardization," IEEE Trans. Ind. Electron., Vol. 58, No. 1, pp. 158-172, Jan. 2011. https://doi.org/10.1109/TIE.2010.2066534
  4. J. Rocabert, A. Luna, F. Blaabjerg, and P. RodriGuez, "Control of power converters in AC microgrids," IEEE Trans. Power Electron., Vol. 27,No. 11, pp. 4734-4749, Nov. 2012. https://doi.org/10.1109/TPEL.2012.2199334
  5. W. Li, X. Ruan, D. Pan, and X. Wang, "Full-feed forward schemes of grid voltages for a three-phase LCL-type grid-connected inverter," IEEE Trans. Ind. Electron., Vol. 60, No. 6, pp. 2237-2250, Jun. 2013. https://doi.org/10.1109/TIE.2012.2193864
  6. Z. Bai, H. Ma, D. Xu, B. Wu, and Y. Fang, "Resonance damping and harmonic suppression for grid-connected current-source converter," IEEE Trans. Power Electron., Vol. 61, No. 7, pp. 3146-3154, Jul. 2014.
  7. J. He, Y. W. Li, D. Bosnjak, and B. Harris, "Investigation and active damping of multiple resonances in a parallel-inverter-based microgrid," IEEE Trans. Power Electron., Vol. 28, No. 1, pp. 234-246, Jan. 2013. https://doi.org/10.1109/TPEL.2012.2195032
  8. X. Wang, F. Blaabjerg, and W. Wu, "Modeling and analysis of harmonic stability in an AC power-electronics-based power system," IEEE Trans. Power Electron., Vol. 29, No. 12, pp. 6421-6432, Dec. 2014. https://doi.org/10.1109/TPEL.2014.2306432
  9. P. C. Loh, "Analysis of multiloop control strategies for LC/CL/LCL-filtered voltage-source and current-source inverters," IEEE Trans. Ind. Appl., Vol. 41, No. 2, pp. 644-654, Mar./Apr. 2005. https://doi.org/10.1109/TIA.2005.844860
  10. M. Malinowski and S. Bernet, "A simple voltage sensorless active damping scheme for three-phase PWM converters with an LCL filter," IEEE Trans. Ind. Electron., Vol. 55, No. 4, pp. 1876-1880, Apr. 2008. https://doi.org/10.1109/TIE.2008.917066
  11. I. J. Gabe, V. F. Montagner, and H. Pinheiro, "Design and implementation of a robust current controller for VSI connected to the grid through an LCL filter," IEEE Trans. Power Electron., Vol. 24, No. 6, pp. 1444-1452, Jun. 2009. https://doi.org/10.1109/TPEL.2009.2016097
  12. G. Shen, D. Xu, L. Cao, and X. Zhu, "An improved control strategy for grid-connected voltage source inverters with an LCL filter," IEEE Trans. Power Electron., Vol. 23, No. 4, pp. 1899-1906, Jul. 2008. https://doi.org/10.1109/TPEL.2008.924602
  13. J. Dannehl, F. W. Fuchs, S. Hansen, and P. B. Thogersen, "Investigation of active damping approaches for PI-based current control of grid-connected pulse width modulation converters with LCL filters," IEEE Trans. Ind. Appl., Vol. 46, No. 4, pp. 1509-1517, Jul./Aug. 2010. https://doi.org/10.1109/TIA.2010.2049974
  14. F. Liu, Y. Zhou, S. Duan, J. Yin, and B. Liu, "Parameter design of a two-current-loop controller used in a grid-connected inverter system with LCL filter," IEEE Trans. Ind. Electron., Vol. 56, No. 11, pp. 4483-4491, Nov. 2009. https://doi.org/10.1109/TIE.2009.2021175
  15. J. He, and Y. W. Li, "Generalized closed-loop control schemes with embedded virtual impedances for voltage source converters with LC or LCL filters," IEEE Trans. Power Electron., Vol. 27, No. 4, pp. 1850-1861, Apr. 2012. https://doi.org/10.1109/TPEL.2011.2168427
  16. C. Bao, X. Ruan, X. Wang, W. Li, and D. Pan, "Step-by-step controller design for LCL-type grid-connected inverter with capacitor current-feedback active-damping," IEEE Trans. Power Electron., Vol. 29, No. 3, pp. 1239-1253, Mar. 2014. https://doi.org/10.1109/TPEL.2013.2262378
  17. J. Dannehl, F. W. Fuchs, and P. B. Thogersen, "PI state space current control of grid-connected PWM converters with LCL filters," IEEE Trans. Power Electron., Vol. 25, No. 9, pp. 2320-2330, Sep. 2010. https://doi.org/10.1109/TPEL.2010.2047408
  18. S. G. Parker, B. P. Mcgrath, and D. G. Holmes, "A general discrete time model to evaluate active damping of grid converters with LCL filters," in Proc. ECCE-ASIA, pp. 2019-2026, 2014.
  19. J. L. Agorreta, M. Borrega, J. Lopez, and L. Marroyo, "Modelling and control of N paralleled grid-connected inverters with LCL filter coupled due to grid impedance in PV plants," IEEE Trans. Power Electron., Vol. 26, No. 3, pp. 770-785, May 2011. https://doi.org/10.1109/TPEL.2010.2095429
  20. J. H. R. Enslin, and P. J. M. Heskes, "Harmonic interaction between a large number of distributed power inverters and the distribution network," IEEE Trans. Power Electron., Vol. 19, No. 6, pp. 1586-1593, Nov. 2004. https://doi.org/10.1109/TPEL.2004.836615
  21. X. Wang, F. Blaabjerg, M. Liserre, and Z. Chen, "An active damper for stabilizing power-electronics-based AC systems," IEEE Trans. Power Electron., Vol. 29, No. 7, pp. 3318-3329, Jul. 2014. https://doi.org/10.1109/TPEL.2013.2278716
  22. X. Sun, L. Yang, R. Wang, and R. Han, "A Novel Impedance Converter for Harmonic Damping in Loop Power Distribution Systems," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 4, No. 1, pp. 162-173, Mar. 2016. https://doi.org/10.1109/JESTPE.2015.2451691
  23. J. Sun, "Small-signal methods for AC distributed power systems - A review," IEEE Trans. Power Electron., Vol. 24, No. 12, pp. 2545-2554, Dec. 2009. https://doi.org/10.1109/TPEL.2009.2029859
  24. S. Zhang, S. Jiang, X. Lu, B. Ge, and F. Z. Peng, "Resonance issues and damping techniques for grid-connected inverters with long transmission cable," IEEE Trans. Power Electron., Vol. 29, No. 1, pp. 110-120, Jan. 2014. https://doi.org/10.1109/TPEL.2013.2253127
  25. E. Twining, and D. G. Holmes, "Grid current regulation of a three-phase voltage source inverter with an LCL input filter," IEEE Trans. Power Electron., Vol. 18, No. 3, pp. 888-895, May 2003.
  26. J. Sun, "Impedance-based stability criterion for grid-connected converters," IEEE Trans. Power Electron., Vol. 26, No. 11, pp. 3075-3078, Nov.2011. https://doi.org/10.1109/TPEL.2011.2136439

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