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)


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.


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


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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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