Study and Application on the Method of Washing Away the Expiring Old Oil in Large Transformer

This article introduced the development of the oil residue flushing vehicle,it can help change the foreign products of extra-high voltage main-transformer oil with domestic products;by simulating the absorbing process of the new oil and measuring the change of the T501 content,found XD? absorbent basically did not absorb T501 antioxidant,and the components of the hydrocarbon oil did not change;the absorption after oil-change further refreshed the oil residue in the coil;analysed the change of dielectric loss of the transformer before and after changing oil,drew the conclusion that by using the oil residue flushing vehicle plus the XD? absorbent could keep the stability of all performances of transformer oil after oil-change..