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Controlled Operation of the Islanded Portion of the International Council on Large Electric Systems (CIGRE) Low Voltage Distribution Network

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  • Ghullam Mustafa Bhutto

    (Department of Electrical Engineering, Quaid-E-Awam University of Engineering, Sciences and Technology (QUEST), Nawabshah 67480, Pakistan
    Department of Energy Technology, Aalborg University, Aalborg 9200, Denmark)

  • Claus Leth Bak

    (Department of Energy Technology, Aalborg University, Aalborg 9200, Denmark)

  • Ehsan Ali

    (Department of Electronic Engineering, Quaid-E-Awam University of Engineering, Sciences and Technology (QUEST), Nawabshah 67480, Pakistan)

Abstract

In islanding, a portion of the power network, comprised of the loads and distributed generation (DG) units, is isolated from the rest of the power grid and forms a micro grid (MG). In this condition, it becomes essential for the islanded MG to operate in a stable and controlled manner by providing ancillary services. When the MG is cut off from the main grid, the islanding must be detected by the DG units. In this condition it is essential that one of the controllers should be switched to the voltage-frequency (VF) control mode. In islanding, the network loses it slack reference and this reference is established by a VF controller. The voltage and the frequency of the islanded MG deviate when disconnected from the transmission grid and these deviations are caused by the load-generation imbalance. The voltage and the frequency of the islanded MG can be restored to the permissible limits if the desired/exceeded amount of active and reactive power is injected/absorbed by the locally available sources in islanded MG. This paper proposes a control strategy which can compensate the voltage and the frequency deviations in the islanded portion of the International Council on Large Electric Systems (CIGRE) low voltage distribution network by using advanced power electronics devices such as STATCOMs) for Photovoltaic (PV) Units and Battery Energy Storage Systems (BESS) STATCOMs (for battery units). The selection of the VF controller for the most suitable DG unit of this test network is also presented in this paper, and the effectiveness of the controllers is verified by presenting simulation results using DIgSILENT (DIgSILENT GmbH, Gomaringen, Germany) power factory software version 15.0.

Suggested Citation

  • Ghullam Mustafa Bhutto & Claus Leth Bak & Ehsan Ali, 2017. "Controlled Operation of the Islanded Portion of the International Council on Large Electric Systems (CIGRE) Low Voltage Distribution Network," Energies, MDPI, vol. 10(7), pages 1-13, July.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:7:p:1021-:d:105019
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    References listed on IDEAS

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    1. Chowdhury, S.P. & Chowdhury, S. & Crossley, P.A. & Gaunt, C.T., 2009. "RETRACTED: UK scenario of islanded operation of active distribution networks with renewable distributed generators," Renewable Energy, Elsevier, vol. 34(12), pages 2585-2591.
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