Abstract:
In high voltage oil-filled equipment, mineral insulating oil has two main functions—to remove heat from heated parts and to insulate conductors. Regardless of the tempera...Show MoreMetadata
Abstract:
In high voltage oil-filled equipment, mineral insulating oil has two main functions—to remove heat from heated parts and to insulate conductors. Regardless of the temperature, transformer oil must always provide reliable insulation of high-voltage equipment elements. The primary indicator characterizing the electrical insulating properties of mineral oil is its electrical strength. This work presents the results of the study, which reflect the change in the value of the breakdown voltage of the oil during its cooling from +60 °C to −20 °C. Modeling shows that when the cell is cooled, together with its contents, conditions are realized on the electrodes for the predominant formation of water in the form of drops or ice particles. Such an experiment and simulation shows the processes occurring in the insulation of a power transformer during its forced commissioning and decommissioning at negative temperatures. Experimental data on the nature of changes in the breakdown voltage of a liquid dielectric depending on the cooling method and the degree of oil oxidation are presented. Ice crystals form in the oil as it cools, the shape of which is different. It was found that in the process of oil cooling in the interelectrode gap, an “ice cloud” or “ice bridge” is formed. During thawing, emulsion water is formed from ice inclusions, which are concentrated on the electrodes of the measuring cell. It was experimentally determined that under high voltage action in small gaps of the measuring cell, water droplets are drawn out, forming a “water bridge” between the electrodes.
Published in: IEEE Transactions on Dielectrics and Electrical Insulation ( Volume: 29, Issue: 6, December 2022)
Funding Agency:
Industrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia
Marina N. Lyutikova was born in Tyumen, Russia, in 1983. She received the M.Sc. degree from the University of Tyumen, Tyumen, in 2006, and the Ph.D. degree in chemical science from the Russian Academy of Sciences, Moscow, Russia, in 2013.
She is currently a Lecturer with the Indusrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia. At the same time, she works as a Leading Chemical Engineer i...Show More
Marina N. Lyutikova was born in Tyumen, Russia, in 1983. She received the M.Sc. degree from the University of Tyumen, Tyumen, in 2006, and the Ph.D. degree in chemical science from the Russian Academy of Sciences, Moscow, Russia, in 2013.
She is currently a Lecturer with the Indusrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia. At the same time, she works as a Leading Chemical Engineer i...View more
Industrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia
Sergey M. Korobeynikov (Member, IEEE) was born in Lesnaya Pristan, East Kazakhstan, Russia, in 1950. He received the M.Sc. degree from the Novosibirsk State University, Novosibirsk, Russia, in 1973, the Ph.D. degree from the Siberian Research Institute of Power Engineering, Novosibirsk, in 1983, and the D.Sc. degree from the Research Institute of High Current Electronics, Tomsk, Russia, in 1998.
He is currently a Professor...Show More
Sergey M. Korobeynikov (Member, IEEE) was born in Lesnaya Pristan, East Kazakhstan, Russia, in 1950. He received the M.Sc. degree from the Novosibirsk State University, Novosibirsk, Russia, in 1973, the Ph.D. degree from the Siberian Research Institute of Power Engineering, Novosibirsk, in 1983, and the D.Sc. degree from the Research Institute of High Current Electronics, Tomsk, Russia, in 1998.
He is currently a Professor...View more
Industrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia
Alexander V. Ridel was born in Energetik, Orenburg, Russia, in 1993. He received the M.Sc. degree from Novosibirsk State Technical University, Novosibirsk, Russia, in 2017, where he is currently pursuing the Ph.D. degree in electrical engineering.
He is currently a Professor Assistant with Novosibirsk State Technical University. He has authored more than ten articles.
Alexander V. Ridel was born in Energetik, Orenburg, Russia, in 1993. He received the M.Sc. degree from Novosibirsk State Technical University, Novosibirsk, Russia, in 2017, where he is currently pursuing the Ph.D. degree in electrical engineering.
He is currently a Professor Assistant with Novosibirsk State Technical University. He has authored more than ten articles.View more
Industrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia
Denis V. Vagin was born in Yurga, Kemerovo, Russia, in 1985. He received the M.Sc. degree in applied mathematics and computer science and the Ph.D. degree in technical sciences from Novosibirsk State Technical University, Novosibirsk, Russia, in 2008 and 2012, respectively.
He is currently an Assistant Professor with the Department of Applied Mathematics, Novosibirsk State Technical University. He has authored or coauthore...Show More
Denis V. Vagin was born in Yurga, Kemerovo, Russia, in 1985. He received the M.Sc. degree in applied mathematics and computer science and the Ph.D. degree in technical sciences from Novosibirsk State Technical University, Novosibirsk, Russia, in 2008 and 2012, respectively.
He is currently an Assistant Professor with the Department of Applied Mathematics, Novosibirsk State Technical University. He has authored or coauthore...View more
Industrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia
Alexander A. Konovalov was born in Zhukovsky, Moscow, Russia, in 1983. He received the B.Sc. degree and the M.Sc. degree in engineering from the Moscow Power Engineering Institute, Moscow, in 2004 and 2006, respectively.
He is currently a Lecturer with the Indusrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia. At the same time, he is also a Deputy Head of the Substation Operation Departme...Show More
Alexander A. Konovalov was born in Zhukovsky, Moscow, Russia, in 1983. He received the B.Sc. degree and the M.Sc. degree in engineering from the Moscow Power Engineering Institute, Moscow, in 2004 and 2006, respectively.
He is currently a Lecturer with the Indusrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia. At the same time, he is also a Deputy Head of the Substation Operation Departme...View more
Contents Industrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia
Marina N. Lyutikova was born in Tyumen, Russia, in 1983. She received the M.Sc. degree from the University of Tyumen, Tyumen, in 2006, and the Ph.D. degree in chemical science from the Russian Academy of Sciences, Moscow, Russia, in 2013.
She is currently a Lecturer with the Indusrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia. At the same time, she works as a Leading Chemical Engineer in a laboratory belonging to the Unified Energy System Federal Grid Company, Moscow. She works on issues related to the diagnosis of oil-filled high-voltage equipment; in particular, its topics are insulating oils and physicochemical methods of analysis, as well as on new, more effective preventive diagnostic methods. She has authored or coauthored more than 40 articles.
Marina N. Lyutikova was born in Tyumen, Russia, in 1983. She received the M.Sc. degree from the University of Tyumen, Tyumen, in 2006, and the Ph.D. degree in chemical science from the Russian Academy of Sciences, Moscow, Russia, in 2013.
She is currently a Lecturer with the Indusrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia. At the same time, she works as a Leading Chemical Engineer in a laboratory belonging to the Unified Energy System Federal Grid Company, Moscow. She works on issues related to the diagnosis of oil-filled high-voltage equipment; in particular, its topics are insulating oils and physicochemical methods of analysis, as well as on new, more effective preventive diagnostic methods. She has authored or coauthored more than 40 articles.View more
Industrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia
Sergey M. Korobeynikov (Member, IEEE) was born in Lesnaya Pristan, East Kazakhstan, Russia, in 1950. He received the M.Sc. degree from the Novosibirsk State University, Novosibirsk, Russia, in 1973, the Ph.D. degree from the Siberian Research Institute of Power Engineering, Novosibirsk, in 1983, and the D.Sc. degree from the Research Institute of High Current Electronics, Tomsk, Russia, in 1998.
He is currently a Professor and the Director of Industrial Safety Department, Novosibirsk State Technical University. He has authored more than 100 articles and four monographs [“Impulse Breakdown of Liquids” (Springer Verlag, 2007)].
Dr. Korobeynikov a member of DEIS IEEE.
Sergey M. Korobeynikov (Member, IEEE) was born in Lesnaya Pristan, East Kazakhstan, Russia, in 1950. He received the M.Sc. degree from the Novosibirsk State University, Novosibirsk, Russia, in 1973, the Ph.D. degree from the Siberian Research Institute of Power Engineering, Novosibirsk, in 1983, and the D.Sc. degree from the Research Institute of High Current Electronics, Tomsk, Russia, in 1998.
He is currently a Professor and the Director of Industrial Safety Department, Novosibirsk State Technical University. He has authored more than 100 articles and four monographs [“Impulse Breakdown of Liquids” (Springer Verlag, 2007)].
Dr. Korobeynikov a member of DEIS IEEE.View more
Industrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia
Alexander V. Ridel was born in Energetik, Orenburg, Russia, in 1993. He received the M.Sc. degree from Novosibirsk State Technical University, Novosibirsk, Russia, in 2017, where he is currently pursuing the Ph.D. degree in electrical engineering.
He is currently a Professor Assistant with Novosibirsk State Technical University. He has authored more than ten articles.
Alexander V. Ridel was born in Energetik, Orenburg, Russia, in 1993. He received the M.Sc. degree from Novosibirsk State Technical University, Novosibirsk, Russia, in 2017, where he is currently pursuing the Ph.D. degree in electrical engineering.
He is currently a Professor Assistant with Novosibirsk State Technical University. He has authored more than ten articles.View more
Industrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia
Denis V. Vagin was born in Yurga, Kemerovo, Russia, in 1985. He received the M.Sc. degree in applied mathematics and computer science and the Ph.D. degree in technical sciences from Novosibirsk State Technical University, Novosibirsk, Russia, in 2008 and 2012, respectively.
He is currently an Assistant Professor with the Department of Applied Mathematics, Novosibirsk State Technical University. He has authored or coauthored more than 30 scientific articles.
Denis V. Vagin was born in Yurga, Kemerovo, Russia, in 1985. He received the M.Sc. degree in applied mathematics and computer science and the Ph.D. degree in technical sciences from Novosibirsk State Technical University, Novosibirsk, Russia, in 2008 and 2012, respectively.
He is currently an Assistant Professor with the Department of Applied Mathematics, Novosibirsk State Technical University. He has authored or coauthored more than 30 scientific articles.View more
Industrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia
Alexander A. Konovalov was born in Zhukovsky, Moscow, Russia, in 1983. He received the B.Sc. degree and the M.Sc. degree in engineering from the Moscow Power Engineering Institute, Moscow, in 2004 and 2006, respectively.
He is currently a Lecturer with the Indusrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia. At the same time, he is also a Deputy Head of the Substation Operation Department, Public Joint Stock Company Rosseti/Rosseti Federal Grid Company of Unified Energy System, Moscow. He has authored or coauthored of more than ten articles.
Alexander A. Konovalov was born in Zhukovsky, Moscow, Russia, in 1983. He received the B.Sc. degree and the M.Sc. degree in engineering from the Moscow Power Engineering Institute, Moscow, in 2004 and 2006, respectively.
He is currently a Lecturer with the Indusrial Safety Department, Novosibirsk State Technical University, Novosibirsk, Russia. At the same time, he is also a Deputy Head of the Substation Operation Department, Public Joint Stock Company Rosseti/Rosseti Federal Grid Company of Unified Energy System, Moscow. He has authored or coauthored of more than ten articles.View more
