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Influence of Insulating Material Properties on Partial Discharges at DC Voltage

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  • Marek Florkowski

    (Department of Electrical and Power Engineering, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland)

Abstract

Understanding a partial discharge mechanism at direct current (DC) is an actual research topic that requires both modeling, simulations and measurements. This paper describes an influence of insulating material properties on partial discharges at DC voltage. Modifications of the traditional model reflecting the conditions of partial discharges (PD) inception and post discharge processes at DC voltage have been proposed. The aim was to show the partial discharge mechanisms and draw attention to the role of parameters of insulation materials adjacent to the cavity at DC voltage. The investigations were performed on two kinds of dielectric material used in power cables. Various combinations of specimens were designed to reveal the effect of the material resistivity on the PD activity. Key observations referred to the impact of the void adjacent material resistance on the partial discharge inception voltage threshold at DC voltage. The modified PD model was applied to analyze both inception and post discharge recovery stage. The role of dielectric properties of material adjacent to the void was investigated, highlighting its impact during static inception stage and in charging stage. Despite many simplifications introduced in the model, measurement results have confirmed the role of the dielectric material surrounding the void on partial discharge dynamics. The average time interval between PD pulses revealed a systematic relationship with respect to the applied voltage and specimen resistivity. This value can be considered in the future research for diagnostic indicator at DC voltage.

Suggested Citation

  • Marek Florkowski, 2020. "Influence of Insulating Material Properties on Partial Discharges at DC Voltage," Energies, MDPI, vol. 13(17), pages 1-17, August.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:17:p:4305-:d:401260
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    References listed on IDEAS

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    1. Marek Florkowski & Dariusz Krześniak & Maciej Kuniewski & Paweł Zydroń, 2020. "Partial Discharge Imaging Correlated with Phase-Resolved Patterns in Non-Uniform Electric Fields with Various Dielectric Barrier Materials," Energies, MDPI, vol. 13(11), pages 1-15, May.
    2. 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.
    3. Aditya Shekhar & Xianyong Feng & Angelo Gattozzi & Robert Hebner & Douglas Wardell & Shannon Strank & Armando Rodrigo-Mor & Laura Ramírez-Elizondo & Pavol Bauer, 2017. "Impact of DC Voltage Enhancement on Partial Discharges in Medium Voltage Cables—An Empirical Study with Defects at Semicon-Dielectric Interface," Energies, MDPI, vol. 10(12), pages 1-18, November.
    4. Thomas Götz & Hannah Kirchner & Karsten Backhaus, 2020. "Partial Discharge Behaviour of a Protrusion in Gas-Insulated Systems under DC Voltage Stress," Energies, MDPI, vol. 13(12), pages 1-21, June.
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    Citations

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    Cited by:

    1. Marek Florkowski & Maciej Kuniewski, 2023. "Analysis of Space Charge Signal Spatial Resolution Determined with PEA Method in Flat Samples including Attenuation Effects," Energies, MDPI, vol. 16(8), pages 1-16, April.
    2. Marek Florkowski & Maciej Kuniewski, 2023. "Partial Discharge-Originated Deterioration of Insulating Material Investigated by Surface-Resistance and Potential Mapping," Energies, MDPI, vol. 16(16), pages 1-17, August.
    3. Alexander S. Karandaev & Igor M. Yachikov & Andrey A. Radionov & Ivan V. Liubimov & Nikolay N. Druzhinin & Ekaterina A. Khramshina, 2022. "Fuzzy Algorithms for Diagnosis of Furnace Transformer Insulation Condition," Energies, MDPI, vol. 15(10), pages 1-21, May.

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