Abstract
In this paper, we analyze the methods of diagnosis and control the functional state of power oil transformers in electrical substations. Oil transformers are the most efficient converters of electrical energy, which is reflected in a higher efficiency in comparison with dry transformers. Oil transformers are designed to work with power grids in large industrial complexes where energy conversion is required to protect equipment from sudden voltage surges. The high loads associated with this work require timely diagnosis and maintenance of transformers. The article discusses the most commonly used methods for diagnosing deviations of the technical parameters of electrical substations in the process of their operation. The authors proposed a method of impedance series-parallel identification, which allows not only to determine the equivalent circuit of the power oil transformer, but also to diagnose possible malfunctions. Functional circuits of the device for impedance series-parallel identification of faults in power oil transformers have been developed.
Highlights
As known, heating a power transformer during its operation is due to the presence of active losses in the windings and core
When the quality of transformer oil deteriorates, active losses increase and the efficiency of the power device decreases, which negatively affects the process of converting electrical energy
It is worth noting that for the diagnosis and control of electrical systems of electrical substations they do not use a comprehensive analysis of many physical processes and construction of equivalent circuits, as well as existing approaches do not allow predicting the state of electrical systems, which would improve the efficiency and reliability of electrical substations in general
Summary
As known, heating a power transformer during its operation is due to the presence of active losses in the windings and core. With the high power of the transformers, impressive heat losses occur. To prevent overheating of the transformer and violation of the insulation of the coil windings, oil cooling systems are used. When the quality of transformer oil deteriorates, active losses increase and the efficiency of the power device decreases, which negatively affects the process of converting electrical energy. It can be concluded that the quality of the oil directly affects the durability of the power transformer. The most important functional elements, from the point of view of control, are transformer oil and the coil of the power device
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
