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The Effect of DC Voltage Pre-Stress on the Breakdown Voltage of Air under Composite DC and LI Voltage and Test Circuit: Design and Application

Author

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  • Mehmet Murat Ispirli

    (Group for Lightning and Surge Protection, Technische Universität Ilmenau, 98693 Ilmenau, Germany
    Electrical Engineering Department, Istanbul Technical University, 34469 Istanbul, Turkey
    Electrical-Electronic Engineering Department, Marmara University, 34722 Istanbul, Turkey)

  • Özcan Kalenderli

    (Electrical Engineering Department, Istanbul Technical University, 34469 Istanbul, Turkey)

  • Florian Seifert

    (Research Unit High-Voltage Technologies, Technische Universität Ilmenau, 98693 Ilmenau, Germany)

  • Michael Rock

    (Group for Lightning and Surge Protection, Technische Universität Ilmenau, 98693 Ilmenau, Germany)

  • Bülent Oral

    (Electrical-Electronic Engineering Department, Marmara University, 34722 Istanbul, Turkey)

Abstract

The use of HVDC systems is increasing in number due to technological innovations, increasing power capacity and increasing customer demand. The characteristics of insulation systems under composite DC and LI voltage must be examined and clarified. In this study, firstly, experimental circuits were designed to generate and measure composite DC and LI high voltage using a simulation program. The coupling elements used were chosen according to simulation results. Afterward, experimental circuits were established in the laboratory according to the simulation results of the designed experimental circuit. Then, breakdown voltages under composite DC and LI voltage for less uniform and non-uniform electric fields were measured with four different electrode systems for positive and negative DC voltage pre-stresses with different amplitudes. The 50% breakdown voltage was calculated using the least-squares method. Finally, 3D models were created for the electrode systems used in the experiments using the finite element method. The efficiency factors of electrode systems calculated with the FEM results were correlated with the experimental breakdown voltage results. Thus, the breakdown behavior of air under bipolar and unipolar composite voltages (CV) was investigated. In conclusion, the experimental results showed that very fast polarity change in bipolar CV causes higher electrical stress compared to unipolar CV.

Suggested Citation

  • Mehmet Murat Ispirli & Özcan Kalenderli & Florian Seifert & Michael Rock & Bülent Oral, 2022. "The Effect of DC Voltage Pre-Stress on the Breakdown Voltage of Air under Composite DC and LI Voltage and Test Circuit: Design and Application," Energies, MDPI, vol. 15(4), pages 1-23, February.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:4:p:1353-:d:748499
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    References listed on IDEAS

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    1. Mehrtash Azizian Fard & Mohamed Emad Farrag & Alistair Reid & Faris Al-Naemi, 2019. "Electrical Treeing in Power Cable Insulation under Harmonics Superimposed on Unfiltered HVDC Voltages," Energies, MDPI, vol. 12(16), pages 1-15, August.
    2. Ik-Soo Kwon & Sun-Jin Kim & Mansoor Asif & Bang-Wook Lee, 2019. "Evaluation of Electric Field and Space Charge Dynamics in Dielectric under DC Voltage with Superimposed Switching Impulse," Energies, MDPI, vol. 12(10), pages 1-15, May.
    3. Lewei Zhu & Boxue Du & Hongna Li & Kai Hou, 2019. "Effect of Polycyclic Compounds Fillers on Electrical Treeing Characteristics in XLPE with DC-Impulse Voltage," Energies, MDPI, vol. 12(14), pages 1-15, July.
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