Comprehensive inspection of power transformer damage: analysis of fault types and causative factors

Abstract

Relevance: by reducing the number of damages in power transformers, it is possible to extend their service life and at the same time increase the reliability of the electric power system. The time and manpower spent on repairing the power transformer would result in huge economic losses for the power supply company and the production company. To reduce this, by analyzing and reducing damage in power transformers, reducing the number of breakdowns and increasing the reliability of the power supply represents the relevance of the work.

Aim: Research of damage in power transformer, analytical review of types of damage and factors that cause them, identification of the factors most likely to cause power transformer failure, identification of diagnostic methods used in detection of damage in elements.

Methods: In the comprehensive examination of power transformer damage, analysis of failure types and factors causing them Scientific research works published in recent years in databases such as IEEE Xplore, Research Gate, Springer Link, Pro Quest, Elsevier, Google Scholar were used. The systematic analysis method was used to reveal the power transformer and the analysis of injuries in its elements. In the statistics part of power transformer damage the statistical analysis method was used.

Results: It was determined that short circuits in the network, the oil pollution, constraints in electricity supply were negative affect failure of power transformer it was concluded that short-circuit and aging of isolation were factor of damage of all elements of the power transformer. It was observed mechanically injured in all elements. In determining mechanical injuries in the winding, a high accuracy method was found to be frequency effects (FRA) method. Winding damage is the most common cause of power transformer failure and is more common at lower voltages than at higher voltages.