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Understanding the Impact of Corona Aging of Ester Oil Adopting Fluorescent Technique

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Abstract

Performance and life of any transformer depend entirely on the dielectric property of the insulation used. In recent times, ester oil is replacing the mineral oil. In this paper, effects of electrical aging on ester oil in the presence of pressboard as a barrier between high voltage and ground electrode is studied. Corona inception voltage has been used to understand the variation in the electrical characteristics of the oil with time. Corona aging induces degradation of ester oil resulting in the formation of carbonaceous particles. This leads an increase in oil concentration occurring due to particles suspension of different size. To analyze this variation, dynamic light scattering analysis is carried out with the oil samples. It was observed that ester oil is fluorescent in nature and formation of carbonaceous particles on aging leads to change in its fluorescence characteristics. To monitor and characterize the degradation, a fluorescence-based analysis is used to obtain the fluorescence data as 3D excitation emission matrix.

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Authors and Affiliations

  1. Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, 600 036, India

    Soumya Thakur & R. Sarathi

  2. Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India

    Swayam Prakash & A. K. Mishra

  3. Tohoku University of Community Service and Science, 3-5-1 Iimoriyama, Sakata, Yamagata, 998-8580, Japan

    Noboru Yoshimura

Authors
  1. Soumya Thakur
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  2. Swayam Prakash
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  3. A. K. Mishra
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  4. R. Sarathi
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  5. Noboru Yoshimura
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Correspondence to R. Sarathi.

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Thakur, S., Prakash, S., Mishra, A.K. et al. Understanding the Impact of Corona Aging of Ester Oil Adopting Fluorescent Technique. INAE Lett 3, 251–256 (2018). https://doi.org/10.1007/s41403-018-0056-x

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  • DOI: https://doi.org/10.1007/s41403-018-0056-x

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