Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart Planning, IMDC-SDSP 2020, Cyperspace, 28-30 June 2020

Research Article

Damping the Inrush Current for Current Transformer

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  • @INPROCEEDINGS{10.4108/eai.28-6-2020.2298154,
        author={Yousif Alyounus and Omar Ghazal and Enaam Albanna Albanna and Nabeel Zuhair Tawfeeq Abdulnabi},
        title={Damping the Inrush Current for Current Transformer},
        proceedings={Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart Planning, IMDC-SDSP 2020, Cyperspace, 28-30 June 2020},
        publisher={EAI},
        proceedings_a={IMDC-SDSP},
        year={2020},
        month={9},
        keywords={inrush current damping the inrush current mal operation of ct transformer},
        doi={10.4108/eai.28-6-2020.2298154}
    }
    
  • Yousif Alyounus
    Omar Ghazal
    Enaam Albanna Albanna
    Nabeel Zuhair Tawfeeq Abdulnabi
    Year: 2020
    Damping the Inrush Current for Current Transformer
    IMDC-SDSP
    EAI
    DOI: 10.4108/eai.28-6-2020.2298154
Yousif Alyounus1,*, Omar Ghazal2, Enaam Albanna Albanna3, Nabeel Zuhair Tawfeeq Abdulnabi1
  • 1: Electrical Eng. Dept. Engineering College, Mosul University
  • 2: Environmental Sciences &Technology College
  • 3: Mosul University
*Contact email: doctor1969yousifyounes@gmail.com

Abstract

The inrush current is a highly asymmetric transient magnetizing current resulting from saturation of the core of the transformer caused by excessive growth of magnetic flux in one direction only. The suggested strategy to damp the inrush current is adding an inductor in parallel with the circuit breaker (C.B., which has a very low resistance when it is closed) at different values of the adding inductor to determine the suitable values of the inductor to damp the probable inrush current. This strategy differs from other strategies because the damping inductor is connected in parallel with the C.B. only at closing the C.B. for a few cycles, The damping inductor prevents the excessive growth for the flux in the core of the CT which lead to saturating the core of CT and then, prevents the excessive growth for the inrush current for specific situations of switching. Finally, the MATLAB program is used to simulate the suggesting strategy.