What specific properties of transformer oil are most affected by oxidation, and how does this impact the transformer's lifespan and performance?
Oxidation is a chemical reaction where transformer oil reacts with oxygen, leading to degradation of the oil's properties. Several specific properties of transformer oil are most significantly affected by oxidation. Acidity increases as oxidation produces organic acids. Increased acidity corrodes the transformer's internal components, such as windings and core, and accelerates the degradation of the paper insulation. Interfacial tension (IFT) decreases. IFT is a measure of the surface tension between the oil and water. As oil oxidizes, it forms polar compounds that reduce IFT, indicating the presence of contaminants and degradation products. Color da....
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Naeem Ahmed
“Oxidation is a chemical reaction where transformer oil reacts with oxygen , leadind to degradtion of the oil's properties. Several specific properties of transformer oil are most significantly affected by oxidation. Acidity increase as oxidation produces organic acids. Increasesd acidity corrodes the transormer;s internakl components, such as windings and core, and accelerates the degratio of the paper insulation. interfacial tension decreases. IFT is a measure of the surface tension between the oil and water. As oil oxidizes, it forms polar compounds the reduce IFT, indicating the presence of contaminants and degradation products. Color darkens, oxidation causes the oil tp become darker, which is a visual indicator of degradation . Dielectric strength decreases. Oxidation products reduce the oil's ability to withstand electrical stress, incresing the risk of electrical breakdown and flashovers. Viscosity increases. Oxidation products reduce the oil.s thicker, which reduces oys ability to circulate and cool the transformer effectively. Sludge formation occurs. Oxidation leads to the formation of sludge, which is a thick, insoluble susbstance that can deposit on the transformer's winding and core, impeding heat transfer and reducing cooling efficency. The dissoled gas analysis (DGA) results are also impacted. Oxidation can affect the generation rates of certained dissolved gases, complicating fault diagnosis, These changes due to oxidation significantly impact the transformer lifespan's and of the paper insulation. Decreased dielectric strength increases the risk of eletrical failure. Corrosion caused by increased acidity damage the transformer internalcomponents, and a hiher risk of catastrophic failure. Monitoring oil properties and implementing mitigation measures, such as oil reclamation or replacement, are essentail to minmize the impact of oxidation and extend the transformer's service life.”
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