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Stable Integration of Power Electronics-Based DG Links to the Utility Grid with Interfacing Impedance Uncertainties

  • S. Kazem Hoseini
  • Edris Pouresmaeil
  • Jafar Adabi
  • João P. S. CatalãoEmail author
Conference paper
Part of the IFIP Advances in Information and Communication Technology book series (IFIPAICT, volume 450)

Abstract

For the integration of distributed generation (DG) units to the utility grid, voltage source converter (VSC) is the key technology. In order to realize high quality power injection, different control techniques have been adopted. However, the converter-based DG interface is subject to inevitable uncertainties, which adversely influence the performance of the controller. The interfacing impedance seen by the VSC may considerably vary in real distribution networks. It can be observed that the stability of the DG interface is highly sensitive to the impacts of interfacing impedance changes so that the controller cannot inject appropriate currents. To deal with the instability problem, this paper proposes an enhanced fractional order active sliding mode control scheme for integration of DG units to the utility grid, which is much less sensitive to interfacing impedance variations. A fractional sliding surface which demonstrates the desired dynamics of the system is developed and then the controller is designed in two phases: sliding phase and reaching phase to keep the control loop stable. The proposed controller takes a role to provide high quality power injection and ensures precise current tracking and fast response despite uncertainties. Theoretical analyses and simulation results are verified to study the performance and feasibility of the proposed control scheme.

Keywords

Voltage source converter Distributed generation Interfacing impedance Fractional order control Active sliding mode control 

References

  1. 1.
    Akorede, M.F., Hizam, H., Pouresmaeil, E.: Distributed energy resources and benefits to the environment. Renewable Sustainable Energy Rev. 14(2), 724–734 (2010)CrossRefGoogle Scholar
  2. 2.
    Blaabjerg, F., Teodorescu, R., Liserre, M., Timbus, V.A.: Overview of control and grid synchronization for distributed power generation systems. IEEE Trans. Ind. Electron. 53(5), 1398–1409 (2006)CrossRefGoogle Scholar
  3. 3.
    Liserre, M., Theodorescu, R., Blaabjerg, F.: Stability of photovoltaic and wind turbine grid-connected inverters for a large set of grid impedance values. IEEE Trans. Power Electron. 21(1), 263–272 (2006)CrossRefGoogle Scholar
  4. 4.
    Mohamed, Y.A.I., El-Saadany, E.F., Salama, M.M.A.: Adaptive grid-voltage sensorless control scheme for inverter-based distribution generation. IEEE Trans. Energy Convers. 24(3), 683–694 (2009)CrossRefGoogle Scholar
  5. 5.
    Mao, X., Ayyanar, R.: An adaptive controller for inverter-interfaced DGs connected to grids with a wide range of unknown impedances. In: Energy Conversion Congress and Exposition (ECCE), pp. 2871–2877(2010)Google Scholar
  6. 6.
    Sun, J.: Impedance-based stability criterion for grid-connected inverters. IEEE Trans. Power Electron. 20(11), 3075–3078 (2011)CrossRefGoogle Scholar
  7. 7.
    Yang, S., Lei, Q., Peng, F.Z., Qian, Z.: A robust control scheme for grid-connected voltage-source inverters. IEEE Trans. Ind. Electron. 58(1), 202–212 (2011)CrossRefGoogle Scholar
  8. 8.
    Podlubny, I.: Fractional-order systems and PIλDµ controllers. IEEE Trans. Autom. Control 41(1), 208–213 (1999)CrossRefMathSciNetGoogle Scholar
  9. 9.
    Valerio, D.: Fractional robust system control. Technical Univ. Lisbon, Ph.D. thesis (2005)Google Scholar
  10. 10.
    Agrawal, O.P.: A general formulation and solution scheme for fractional optimal control problems. Nonlinear Dynamics 38(1–4), 323–337 (2006)Google Scholar
  11. 11.
    Jelicic, Z.D., Petrovacki, N.: Optimality conditions and a solution scheme for fractional optimal control problems. Struct. Multidiscip. Opti. 38(6), 571–581 (2009)CrossRefzbMATHMathSciNetGoogle Scholar
  12. 12.
    Bartolini, G., Fridman, L., Pisano, A., Usai, E., (Eds.).: Modern sliding mode control theory: new perspectives and applications. Springer, Berlin (2008)Google Scholar
  13. 13.
    Edwards, C., Fossas, Colet. E., Fridman, L., (Eds.).: Advances in variable structure and sliding mode control. Springer, Berlin (2006)Google Scholar
  14. 14.
    Hosseinnia, S.H., Tejado, I., Vinagre, B.M., Sierociuk, D.: Boolean-based fractional order SMC for switching systems: application to a DC-DC buck converter. Signal Image and Video Processing 6(3), 445–451 (2012)CrossRefGoogle Scholar
  15. 15.
    Pisano, A., Rapaic, M.R., Jelicic, Z.D., Usai, E.: Sliding mode control approaches to the robust regulation of linear multivariable fractional-order systems. Int. J. Robust Nonlinear Control 20(18), 2045–2056 (2010)CrossRefzbMATHMathSciNetGoogle Scholar
  16. 16.
    Efe, M.O.: Fractional order sliding mode control with reaching law approach. Turk J Electr Eng. Comput Sci. 18(5), 731–747 (2010)Google Scholar
  17. 17.
    IEEE standard for interconnecting distributed resources with electric power systems, IEEE standard 1547-2003 (July 2003)Google Scholar

Copyright information

© IFIP International Federation for Information Processing 2015

Authors and Affiliations

  • S. Kazem Hoseini
    • 1
  • Edris Pouresmaeil
    • 2
  • Jafar Adabi
    • 1
  • João P. S. Catalão
    • 3
    Email author
  1. 1.Faculty of Electrical and Computer EngineeringBabol (Noshirvani) University of TechnologyBabolIran
  2. 2.Centre for Energy InformaticsUniversity of Southern Denmark (SDU)OdenseDenmark
  3. 3.University Beira Interior, CovilhãINESC-ID and IST, University LisbonLisbonPortugal

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