The thesis discusses the role and operation of power transformers, which are key elements of the power system. The first part presents the transformer, its history, construction, and basic operating principles.
The following chapters provide a detailed overview of transformer monitoring systems, which enable continuous tracking of key operating parameters such as oil and winding temperature, bushing condition, gas content in the oil, the operation of the tap changer, the cooling system, and other auxiliary equipment. Monitoring is essential for the early detection of faults and for extending the service life of the transformer.
The thesis also addresses various types of transformer faults and protection systems designed to prevent damage and ensure the reliable operation of the power network. Overcurrent, residual, and differential protection, the Buchholz relay, and other protective devices are presented, all of which provide selective, fast, and reliable operation in the event of faults.
In the final part, a simulation of differential transformer protection is carried out, analyzing the response of parameters during phase-to-phase faults and at startup.
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