Abstract
The article provides a technical solution to improve the reliability of power transformers diagnosing in conditions of seasonal temperature changes. A feature of the railway transport power supply system is the location of traction substations along the railway track. Operation of power transformers is carried out in open conditions. It is shown that for diagnosing power transformers, it is advisable to use portable systems based on acoustic monitoring of partial discharges due to their high mobility and relative ease of installation. To improve the reliability of diagnostics in conditions of seasonal temperature changes, it is proposed to use a defect simulator and a differential method for measuring the parameters of partial discharges. A scheme for carrying out experiments and a structural diagram of a defect simulator are proposed. Expressions are given that describe the propagation of acoustic waves with a change in the temperature, and, accordingly, the properties of transformer oil. The data of diagnostics obtained on power transformers of the railway power supply system are presented showing possible cases of defects and their identification when using the proposed defect simulator.
Keywords
Power transformers, acoustic control, partial discharges, temperature changes, oil properties, wave propagation, reliability enhancement, defect simulator.
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