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  • Protection of Inverter-based Distributed Generation with Series Dynamic Braking Resistor: A Variable Duty Control Approach

    Author(s)
    Alam, M Shafiul
    Hossain, Md Ismail
    Hossain, Md Alamgir
    Choudhory, Md Shamimul Haque
    Uddin, Muhammad Athar
    Griffith University Author(s)
    Hossain, Md. Alamgir
    Year published
    2018
    Metadata
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    Abstract
    Fault current level in inverter based distributed generation (IBDG) integrated grid system increases manifold due to high level of IBDG penetration. Nevertheless, for having less detrimental effect of fault in the system fault current must be kept within specified limit as per new grid code. This paper proposes series dynamic braking resistor (SDBR) based protection scheme for IBDG with variable duty control strategy. SDBR is connected with the AC side of the IDBG to insert variable resistance during contingencies depending on the level of fault current. Current at the point of common coupling is employed to detect system ...
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    Fault current level in inverter based distributed generation (IBDG) integrated grid system increases manifold due to high level of IBDG penetration. Nevertheless, for having less detrimental effect of fault in the system fault current must be kept within specified limit as per new grid code. This paper proposes series dynamic braking resistor (SDBR) based protection scheme for IBDG with variable duty control strategy. SDBR is connected with the AC side of the IDBG to insert variable resistance during contingencies depending on the level of fault current. Current at the point of common coupling is employed to detect system disturbances. Feedback control strategy is developed for the control of DC link voltage such that the net power exchange with the DC capacitor is zero. Direct axis inner current control strategy is adopted to transfer IBDG power to grid. Symmetrical three phase to ground and unsymmetrical double line to ground faults are applied in the system to show the efficacy the proposed variable duty based SDBR control technique. The proposed variable duty based SDBR control scheme have been found as an effective solution to limit the fault current for IBDG system as evident from the simulation results.
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    Conference Title
    2018 10th International Conference on Electrical and Computer Engineering (ICECE)
    DOI
    https://doi.org/10.1109/ICECE.2018.8636781
    Subject
    Electrical engineering
    Science & Technology
    Computer Science, Theory & Methods
    Engineering, Electrical & Electronic
    Publication URI
    http://hdl.handle.net/10072/404308
    Collection
    • Conference outputs

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