Advertisement

INAE Letters

, Volume 3, Issue 4, pp 251–256 | Cite as

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

  • Soumya Thakur
  • Swayam Prakash
  • A. K. Mishra
  • R. Sarathi
  • Noboru Yoshimura
Original Article
  • 56 Downloads

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.

Keywords

CIV Partial discharge UV analysis Viscosity Particle size analysis Fluorescence analysis EEM 

References

  1. Adler HA, Cosgrove MF (1965) Simulated service aging tests of insulating oils in transformers. IEEE Trans Power Appar Syst 84(8):657–666CrossRefGoogle Scholar
  2. Balasubramanian M, Ravi G, Dharmalingam V (2012) Interdependence of thermal and electrical stresses on initiating degradation of transformer insulation performances. In: IEEE—international conference on advances in engineering, science and management (ICAESM-2), pp 399–402Google Scholar
  3. Billig E (1946) Mechanical stresses in transformer windings. Electr Eng Part II Power Eng J Inst 93(33):227–243Google Scholar
  4. Choe E, Min DB (2007) Chemistry of deep-fat frying oils. J Food Sci 72(5):R77–R86CrossRefGoogle Scholar
  5. Coulibaly ML, Perrier C, Marugan M, Beroual A (2013) Aging behavior of cellulosic materials in presence of mineral oil and ester liquids under various conditions. IEEE Trans Dielectr Electr Insul 20(6):1971–1976CrossRefGoogle Scholar
  6. Deepa S, Sarathi R, Mishra AK (2006) Synchronous fluorescence and excitation emission characteristics of transformer oil ageing. Talanta 70(4):811–817CrossRefGoogle Scholar
  7. Devins JC, Rzad SJ, Schwabe RJ (1981) Breakdown and prebreakdown phenomena in liquids. J Appl Phys 52(7):4531–4545CrossRefGoogle Scholar
  8. Ganger B, Maier G (1974) On electrical aging of oil-impregnated high-voltage dielectrics. IEEE Trans Electr Insul 9(3):92–97CrossRefGoogle Scholar
  9. IEC 60270 (2001) High Voltage Test Tehniques- Partial Discharge Measurement. 3rd edn. Reference number IEC 60270:2000(E), Commission Electrotechnique Internationale, SwitzerlandGoogle Scholar
  10. Izeki N, Kurahashi A, Matsuura K (1971) Behavior of oil corona and damage of transformer insulation. IEEE Trans Power Appar Syst 90(5):2330–2338CrossRefGoogle Scholar
  11. Judd MD, Cleary GP, Bennoch CJ (2002) Applying UHF partial discharge detection to power transformers. IEEE Power Eng Rev 22(8):57–58CrossRefGoogle Scholar
  12. Kao S, Asanov AN, Oldham PB (1998) A comparison of fluorescence inner-filter effects for different cell configurations. Instrum Sci Technol 26(4):375–387CrossRefGoogle Scholar
  13. Lakowicz JR (2006) Principles of fluorescence spectroscopy. 3rd edn. SpringerGoogle Scholar
  14. Narasimha P, Chakrasali RL (2017) Distribution transformer failure in India root causes and remedies. In: International conference on innovative mechanisms for industry applications (ICIMIA), pp 106–110Google Scholar
  15. Neffer AG, Rodrigo A, Hector C II, Vargas IH III (2011) J Braz Chem Soc 22(12) (São Paulo) Google Scholar
  16. Oommen TV, Claiborne CC, Walsh EJ, Baker JP (2000) A new vegetable oil based transformer fluid: development and\nverification. In: 2000 annual report conference on electrical insulation and dielectric phenomena (Cat. No. 00CH37132), pp 308–312Google Scholar
  17. Panigrahi SK, Thakur S, Sarathi R, Mishra AK (2017) Understanding the physico-chemical properties of thermally aged natural ester oil adopting fluorescent technique. IEEE Trans Dielect Electr Insul 24(6):3460–3470CrossRefGoogle Scholar
  18. Sarathi R, Sheema IPM, Rajan JR, Danikas MG (2014) Influence of harmonic AC voltage on surface discharge formation in transformer insulation. IEEE Trans Dielectr Electr Insul 21(5):2383–2393CrossRefGoogle Scholar
  19. Thakur S, Sarathi R, Gautam R, Vinu R (2017) Thermal aging of cellulosic pressboard material and its surface discharge and chemical characterization. Cellulose 24(11):5197–5210CrossRefGoogle Scholar
  20. Valeur B, Berberan-Santos MN (2012) Molecular fluorescence: principles and applications. 2nd edn. WileyGoogle Scholar
  21. Yadav KS, Sarathi R (2015) Influence of thermally aged barrier on corona discharge activity in transformer oil under AC voltages. IEEE Trans Dielectr Electr Insul 22(5):2415–2423CrossRefGoogle Scholar
  22. Ziomek W (2012) Transformer electrical insulation. IEEE Trans Dielectr Electr Insul 19(6):1841–1842CrossRefGoogle Scholar

Copyright information

© Indian National Academy of Engineering 2018

Authors and Affiliations

  • Soumya Thakur
    • 1
  • Swayam Prakash
    • 2
  • A. K. Mishra
    • 2
  • R. Sarathi
    • 1
  • Noboru Yoshimura
    • 3
  1. 1.Department of Electrical EngineeringIndian Institute of Technology MadrasChennaiIndia
  2. 2.Department of ChemistryIndian Institute of Technology MadrasChennaiIndia
  3. 3.Tohoku University of Community Service and ScienceSakataJapan

Personalised recommendations