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Energies, Vol. 11, Pages 1465: Impact of Low Molecular Weight Acids on Oil Impregnated Paper Insulation Degradation

Energies, Vol. 11, Pages 1465: Impact of Low Molecular Weight Acids on Oil Impregnated Paper Insulation Degradation

Energies doi: 10.3390/en11061465

Authors: Kakou D. Kouassi Issouf Fofana Ladji Cissé Yazid Hadjadj Kouba M. Lucia Yapi K. Ambroise Diby

Aging of a power transformer’s insulation system produces carboxylic acids. These acids—acetic, formic and levulinic—are absorbed by the paper insulating material, thus accelerating the degradation of the whole insulation system. In this contribution, the effect of these acids on the aging of oil-impregnated paper insulation used in power transformer is reported. A laboratory aging experiment considering different concentrations of these three acids was performed to assess their effect on the insulation system’s degradation. Each acid was individually mixed with virgin oil, and a mixture of acids was also blended with oil. The paper’s degradation was assessed by the degree of polymerization (DPv). It was found that the DPv of paper aged with formic acid decreased much faster in comparison to the other acids.

Authors:   Kouassi, Kakou D.; Fofana, Issouf ; Cissé, Ladji ; Hadjadj, Yazid ; Yapi, Kouba M. Lucia; Diby, K. Ambroise
Journal:   Energies
Volume:   11
edition:   6
Year:   2018
Pages:   1465
DOI:   10.3390/en11061465
Publication date:   06-Jun-2018
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