This book is devoted to one of the main problems of modern electrical power engineeringpower transformer diagnostics. The first three chapters discuss the fundamentals: The first chapter presents the physical reasons for power transformers' failures and the technical and economic consequences of disruption of the normal operation. The second chapter reviews the standard technologies for monitoring the state of the high-voltage transformers. The third chapter tells about monitoring the condition of transformer windings based on the pulse method.

The fourth chapter presents the technologies for transformer windings condition controlled by means of nanosecond pulses. The stages of improving the pulsed method based on a short probing pulse of the nanosecond range, the results of experiments on identifying the radial and axial displacements of the winding, studies of the effect of the duration and shape of the probing pulse on the sensitivity of the diagnostic procedure, and the stages of developing a mathematical as well as physical model of a power transformer are consistently presented.

Tackles one of the main problems of modern electrical power engineering: transformers and their failure Reviews the standard technologies for monitoring the state of the high-voltage transformers Offers a new technology for transformer windings condition control by means of nanosecond pulses

Autorentext
Vasiliy Ya. Ushakov is Honored Worker of Science and Technology of the Russian Federation. Now he is Professor at the Energy Engineering School of Tomsk Polytechnic University. He has many years of experience teaching special disciplines ("High-voltage engineering", "Current state, problems and perspectives of Electrical engineering", "Energy saving ") in Russian and in English (including abroad - Ulsan University, South Korea) and the course "Professional English" for Russian-speaking students. He has published over 300 scientific articles and 24 monographs and textbooks (five of them in Springer Verlag) and received 38 invention certificates and patents. Under his leadership, 37 candidate and 7 doctoral dissertations were defended. In different years, he held the following positions: Head of High Voltage Department of the Tomsk Polytechnic University (TPU), Head of High Voltage Research Institute at TPU, Vice-Rector for Research of TPU, and Head of Regional Resources SavingCentre. He has several government awards. Alexey V. Mytnikov received the M.S. degree in Electrical Engineering from Tomsk Polytechnic University in 1988. He received the Ph.D. degree in 2001. He is Associate Professor of Power Engineering Institute, Tomsk Polytechnic University (Tomsk, Russia). His research interests focus on power transformer diagnostics, high-voltage technologies, and engineering pedagogics. Also, he provides full range of special courses for bachelor's and master's teaching specialization "High Voltage Power Engineering", including lectures, practices, and workshops. New technology of winding condition control, which is based on the nanosecond probing impulses, is the result of his experimental work. Simulations are a useful tool but as Hippocrates once said: "Clever man is not who knows a lot, but whose knowledge is useful". I follow this motto now. Alexey V. Mytnikov published more than 80 scientific articles. Ikromjon U.Rakhmonov is Doctor of Technical Sciences, Professor, and Head of the Department of Power Supply, Tashkent State Technical University. The scope of his scientific interests is increasing the efficiency and reliability of meeting the energy needs of industrial enterprises by predicting, standardizing of energy consumption, and monitoring the state of power-consuming equipment.He published about 200 scientific and educational works, including 4 monographs and 48 articles in journals from the SCOPUS database. His Hirsch Index is 10 (in the SCOPUS database). Under the scientific supervision of IU Rakhmonov, 2 doctoral dissertations were defended; currently, 2 doctoral students and 4 independent researchers are preparing their scientific qualification works (dissertations). During his pedagogical work, he published 7 textbooks, 5 manuals, and more than 20 guidelines.

Inhalt
Failure reasons of power transformers.- Traditional technologies for condition monitoring of high-voltage transformer.- Diagnostics of the condition of transformer windings by probing pulses of microsecond duration.- Diagnostics of the transformer winding condition by probing pulses of nanosecond duration.