Skip to main content
Article thumbnail
Location of Repository

Analytical methods for assessing paper degradation In transformers

By Stavros Christofidis

Abstract

Power transformers are essential equipments for distributing electricity. However, maintenance of these equipments is necessary to ensure long working life and to avoid catastrophic incidents. Insulation of the instrument is essential, and mainly consists of mineral oil and cellulosic paper. This research work investigates and examines in a series of different experiments the compounds produced from the degradation of the cellulosic paper, known as furanic compounds. Five furanic derivatives (5-HMF, 2-FAL, 2-ACF, 5-MEF and FOL) were examined, and it was established throughout this work that these furanic compounds degradate faster in aqueous solution, under a controlled environment, than in an organic, it is possible to produce from one furanic compound other derivatives, and finally each furanic compound distributes differently in an oil water environment, affecting the recovery of each individual. The knowledge obtained from this research work can be used for the development of the existing method of analysis of furanic compounds, and help to provide a better diagnosis of the insulation state of the transformer

Publisher: Cranfield University
Year: 2006
OAI identifier: oai:dspace.lib.cranfield.ac.uk:1826/2737
Provided by: Cranfield CERES

Suggested articles

Citations

  1. (1960). Application to transformers”. doi
  2. (2006). Cellulose Insulation in Oil-Filled Power Transformers: Part II doi
  3. (1994). Chemical Degradation of Cellulosic Insulation Paper for Power Transformers” doi
  4. (1982). Correlation of Strength and Thermal Degradation of Paper Made from Cellulose Fibres”,
  5. (1970). Criteria for Characterising the Degradation of Paper-Based Insulation”,
  6. (1990). Degradation of Cellulosic Insulation in Power Transformers. Part 1: Factors Affecting the Measurement of the Average Viscometric Degree of Polymerisation of New and Aged Electrical Papers”, doi
  7. (2000). Degradation of Cellulosic Insulation in Power Transformers. Part 3: Effects of Oxygen and Water on Ageing in Oil”, doi
  8. (1997). Degradation of transformers insulation” CIGRE,
  9. (1981). Diagnosis of Ageing Deterioration of Insulating Paper”,
  10. (1997). Furanic compounds analysis: a tool for predictive maintenance of oil filled electrical equipment”
  11. (2001). Insulating Paper Ageing and Furfural Formation” doi
  12. (2000). Low Temperature Thermal Degradation of Cellulosic Insulating Paper in Air and Transformer oil”, doi
  13. (1998). M.Avidano and W.Tumiatti, doi
  14. (1999). Principles and Practice of Analytical Chemistry”, Stanley Thornes (Publishers) Ltd, 4 th Edition,
  15. (1968). Principles of Organic Synthesis” doi
  16. (1994). Review of Chemical Indicators of Degradation of cellulosic Electrical Paper Insulation in Oil-Filled Transformers”, doi
  17. (1970). Synthesis of Work Carried out at LCIE on Paper Degradation”,
  18. (1987). Teranishi,”Degradation of Insulating Materials of Transformers”, doi
  19. (1992). Transformer Condition Monitoring-Realizing an Intergrated Adaptive Analysis System”,
  20. (2001). Transformer Maintenance Guide”, Transformer Maintenance Institute, p 192,
  21. (2004). Transformer Oil Handbook”,
  22. (1998). Uttamchandani and O.Farish, “Infrared Detection of Transformer Insulation Degradation Due to Accelerated Thermal Aging”, doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.