Investigation of Oil Temperature Effect on Aging Marker Content of Insulating Paper in Power Transformers, by Gas Chromatography Method

Articles in Press

Document Type : Research Paper

Authors

1 Chemistry and Process Research Department, Niroo Research Institute, Tehran, 1466-5517 Iran

2 Chemistry and Process Research Department, Niroo Research Institute, Tehran, Iran

Abstract

Insulating paper aging of power transformers, which is a reliability factor for this equipment, can be evaluated by non-destructive methods such as measuring chemical markers’ content in transformer oil. Since the sampling temperature of oil can affect the accuracy of laboratory measurements, in this study, the correlation between novel aging marker methanol and degree of polymerization (DP) of insulating paper has been studied. Temperature correction factors have been obtained for the markers (2-Fal, water and methanol) and the correlation formula has been improved by under load transformers’ data. To optimize the calculated estimation formula, sampling from real transformer has been carried out. Various experiments have been performed on them and their results have been analyzed. The real DP was also measured for the insulating papers, sampled at the overhaul stage. The optimized model for insulating paper DP calculation using temperature corrected concentration of methanol in insulating oil has been provided in this work.

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Journal of Chemical and Petroleum Engineering

Articles in Press, Accepted Manuscript
Available Online from 01 January 2025

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History

  • Receive Date: 30 August 2023
  • Revise Date: 21 October 2024
  • Accept Date: 28 October 2024

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