Method for Reducing Sediment Formation in Transformer Oil

The leading position among liquid dielectrics used in high-voltage equipment is occupied by transformer oil. Over 130 years of using insulating oil, a lot of valuable information has been obtained, in particular: about the condition of the oil during its operation; about methods for restoring its characteristics; known methods of protection against active oxidation; and methods for monitoring oil parameters and assessing the condition of the insulation system of oil-filled equipment have been developed. Despite the fact that mineral oils cope quite well with their functions-insulation and heat removal, there are a number of properties that do not meet the requirements of modern energy. Thus, in terms of fire resistance, chemical stability, and biodegradability, transformer oils are significantly inferior to ester dielectric fluids, which are quite widely used by foreign energy companies. In addition, transformer oils, during their prolonged use in electrical equipment, are capable of forming sediments of various consistencies. For efficient and reliable operation of the insulation system, such precipitation is extremely undesirable. This article proposes a method for optimizing the properties of transformer oil (aromatic and paraffin) to stabilize the sedimentation process by mixing the oil with a synthetic ester in a certain ratio.