Transformer oil analysis

Analysis of transformer oil, which is in operation, is quite important. In addition to information on the current state of the insulating oil, it also allows you to detect other problems: aging of paper insulation, the presence of partial discharges, etc. Depending on the amount of tests performed, a complete and abbreviated analysis of transformer oil is distinguished.


The process of transformer maintenance has been developing intensively over the past 20 years. This was a consequence of the need for high reliability of energy transmission through power grids, reduction of failures of oil-filled equipment and reduction of costs for repairs. The high price of new transformers does not allow for the replacement of equipment every time it fails. Therefore, maintenance is exactly the tool that increases the life span of power transformers.


For example, monitoring the current status of transformer oil can detect developing defects, which in the future may lead to unplanned outages. If the maintenance approach correctly, then you can determine when it is better to bring the power equipment in for repair.


Note that some of the components of the test of power transformers do not pose great difficulties in their implementation. We are talking about checking the operation of the gas relay, the on-load tap-changer, as well as checking the leakage. To determine the condition of the paper insulation, it is necessary to analyze the transformer oil.


Transformer oil performs several functions. One of the most important is the provision of electrical insulation. If the moisture content in the oil exceeds the normalized value, then this leads to a sharp deterioration in the insulating properties, which ultimately result in dielectric breakdown.


Moisture can get into the oil, for example, with a sharp temperature drop. Not only oil suffers from it, but also cellulose insulation, which, when moistened, wears out more intensively.


Installations of the type CMM-R of the GlobeCore trademark are designed to extend the service life of transformers by the method of restoring dielectric strength and chemical composition of insulating oils.


In the process of oil recovery, decomposition products and acidic components are removed from it, clarification occurs, oxidation resistance increases, and the ability to dissolve gases decreases.


The uniqueness of the CMM-R transformer oil processing plants lies in their ability to work in tandem with degassing plants or installations for oil drying. This allows the recovery of insulating liquids directly in the transformer.

Regeneration of oil at the place of operation of the transformer allows you to dissolve the sediment from the insulation of the windings and remove it using a sorbent.


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