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Development of a Simple Experimental Setup for the Study of the Formation of Dry Bands on Composite Insulators

Author

Listed:
  • Marc-Alain Andoh

    (International Research Center on Atmospheric Icing and Electrical Network Engineering, University of Quebec at Chicoutimi, 555 Boulevard de l’Université, Chicoutimi, QC G7H 2B1, Canada)

  • Kone Gbah

    (Institut National Polytechnique, Houphouët-Boigny, Yamoussoukro BP 1093, Côte d’Ivoire)

  • Christophe Volat

    (International Research Center on Atmospheric Icing and Electrical Network Engineering, University of Quebec at Chicoutimi, 555 Boulevard de l’Université, Chicoutimi, QC G7H 2B1, Canada)

Abstract

This paper introduces a new geometry for the study of dry band formation. Firstly, a thermoelectric simulation of a 69 kV uniformly polluted composite insulator was performed. The results obtained show that thermal stress is greater at the rod surface where current density is maximum. In order to experimentally reproduce the constriction of current density lines on the insulator rod surface, which is the cause of dry band formation, the development of a new simple geometric setup, which was then tested experimentally, was proposed. For this purpose, an ESDD value corresponding to a high level of pollution was used for each polluted sample, and the samples were placed in a climate chamber at constant 90% relative humidity and a constant ambient temperature of 20 °C. Low-voltage tests permitted the determination of the wetting duration, which corresponds to the maximum surface conductance of the polluted layer. The values obtained agree with the 10–40 min duration recommended in IEC 60507. Moreover, the tests performed at a higher voltage demonstrated the efficiency of the proposed setup to simulate the complex process of dry band formation in a reproducible way in terms of leakage current and temperature behavior. The proposed setup is a new and simple method that can be easily used by the electrical industry to develop new material for the next generation of overhead line composite insulators without requiring costly HV equipment.

Suggested Citation

  • Marc-Alain Andoh & Kone Gbah & Christophe Volat, 2022. "Development of a Simple Experimental Setup for the Study of the Formation of Dry Bands on Composite Insulators," Energies, MDPI, vol. 15(14), pages 1-17, July.
  • Handle: RePEc:gam:jeners:v:15:y:2022:i:14:p:5108-:d:861679
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    References listed on IDEAS

    as
    1. Mohammed El Amine Slama & Maurizio Albano & Abderrahmane Manu Haddad & Ronald T. Waters & Oliver Cwikowski & Ibrahim Iddrissu & Jon Knapper & Oliver Scopes, 2021. "Monitoring of Dry Bands and Discharge Activities at the Surface of Textured Insulators with AC Clean Fog Test Conditions," Energies, MDPI, vol. 14(10), pages 1-17, May.
    2. Qing Yang & Rui Wang & Wenxia Sima & Chilong Jiang & Xing Lan & Markus Zahn, 2012. "Electrical Circuit Flashover Model of Polluted Insulators under AC Voltage Based on the Arc Root Voltage Gradient Criterion," Energies, MDPI, vol. 5(3), pages 1-18, March.
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    Cited by:

    1. Jinpeng Hao & Jinzhu Huang & Ziyi Fang & Xiao He & Qiang Wu & Xiaolong Gu & Yu Wang & Hong Wu, 2023. "Suppression Measures of Partial Discharge at Rod–Plate Connection in Composite Tower," Energies, MDPI, vol. 16(9), pages 1-17, April.

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