Cellulose chemical markers in transformer oil insulation Part 1: Temperature correction factors

• Published in: IEEE transactions on dielectrics and electrical insulation Vol. 20; no. 6; pp. 2287 - 2291
• Main Authors: Jalbert, Jocelyn, Lessard, Marie-Claude, Ryadi, Mohamed
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-12-2013; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: 2-furfural; 2-furfuraldehyde; Aging; asset management; Cellulose; Cellulose degradation; Chemicals; correction factor; degree of polymerization; ethanol; insulating paper; methanol; Oil insulation; Power transformer insulation; residual life; Temperature; transformer
• ISSN: 1070-9878; 1558-4135
• DOI: 10.1109/TDEI.2013.6678881

The concentrations of cellulose chemical markers, in oil, are influenced by various parameters due to the partition between the oil and the cellulose insulation. One major parameter is the oil temperature which is a function of the transformer load, ambient temperature and the type of cooling. To accurately follow the chemical markers concentration trends during all the transformer life, it is crucial to normalize the concentrations at a specific temperature. In this paper, we propose equations for the normalization of methanol, ethanol and 2-furfural at 20 °C. The proposed equations have been validated on some real power transformers.