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Analysis of Space Charge Signal Spatial Resolution Determined with PEA Method in Flat Samples including Attenuation Effects

Author

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  • Marek Florkowski

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

  • Maciej Kuniewski

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

Abstract

The constant development of the electrical engineering sector, especially in the transmission of electrical energy under high-voltage direct current (HVDC), requires research on new insulation materials and investigations of physical phenomena under ultrahigh electrical fields in solid dielectrics. One of the current problematic issues is the formation of space charge in HV insulation systems, which affects the operational electrical field distribution and can lead to faster insulation degradation. There are several problems that have to be considered before every space charge measurement, such as the attenuation and dispersion of sound waves in tested dielectric materials, reflections at the interfaces, and the spatial resolution of the measured charge profile. The spatial resolution is one of the most important technical factors of the PEA measurement stand. The spatial resolution, as it is assumed, depends on several factors, such as the width of the pulser and the pulse rise time, the thickness of the piezoelectric sensor, and the dispersion of the tested material. The article presents the laboratory measurement results of the impact of pulser parameters, such as pulse width and rise time, and sensor thickness on the equivalent thickness of the measured net charge layer corresponding to the resolution of the method. The dispersion in the tested LDPE material is also presented and analysed. The results show that with an increase in the pulser rise time, a higher resolution of the pea method can be achieved.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:8:p:3592-:d:1129247
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    References listed on IDEAS

    as
    1. Marek Florkowski & Jakub Furgał & Maciej Kuniewski, 2021. "Lightning Impulse Overvoltage Propagation in HVDC Meshed Grid," Energies, MDPI, vol. 14(11), pages 1-21, May.
    2. Antonino Imburgia & Pietro Romano & George Chen & Giuseppe Rizzo & Eleonora Riva Sanseverino & Fabio Viola & Guido Ala, 2019. "The Industrial Applicability of PEA Space Charge Measurements, for Performance Optimization of HVDC Power Cables," Energies, MDPI, vol. 12(21), pages 1-13, November.
    3. Antonino Imburgia & Pietro Romano & Giuseppe Rizzo & Fabio Viola & Guido Ala & George Chen, 2020. "Reliability of PEA Measurement in Presence of an Air Void Defect," Energies, MDPI, vol. 13(21), pages 1-14, October.
    4. Giuseppe Rizzo & Pietro Romano & Antonino Imburgia & Guido Ala, 2019. "Review of the PEA Method for Space Charge Measurements on HVDC Cables and Mini-Cables," Energies, MDPI, vol. 12(18), pages 1-23, September.
    5. Giovanni Mazzanti, 2021. "Issues and Challenges for HVDC Extruded Cable Systems," Energies, MDPI, vol. 14(15), pages 1-34, July.
    6. Marek Florkowski, 2020. "Influence of Insulating Material Properties on Partial Discharges at DC Voltage," Energies, MDPI, vol. 13(17), pages 1-17, August.
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