Download or read book Impulse Breakdown of Liquids written by Vasily Y. Ushakov and published by Springer Science & Business Media. This book was released on 2007-09-21 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book describes the main physical processes and phenomena in pulsed electric breakdown. The knowledge and the control of the electric breakdown of liquids is important not only for the insulation inside power systems but it is also used for the creation and information of high voltage and high current pulses. Such high-voltage micro- and nanosecond pulses find wide application in experimental physics, electro discharge technology, physics of dielectrics, radar detection and ranging, high-speed photography.
Download or read book Electrical Breakdown of Liquid Dielectrics A Review written by I. E. Balygin and published by . This book was released on 1972 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The review is a comparison of different test data on liquid dielectric breakdown. It supports the assertion that only in certain particular cases is the liquid breakdown mechanism similar to the mechanism of gas. This mechanism is largely determined by the physical and chemical nature of the substance and by certain external factors, such as the form and material of the electrodes, the form of the applied voltage, and a few others. From this it follows that no unitary mechanism for the breakdown of liquid dielectrics exists, and therefore one can scarcely look for the creation of a breakdown theory which will be generally valid for all liquid dielectrics, regardless of their physical and chemical nature.
Download or read book Liquid Dielectrics in an Inhomogeneous Pulsed Electric Field written by Mikhail N. Shneider and published by IOP Publishing Limited. This book was released on 2019-11-29 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by leading experts in the field, the first edition of this textbook was the first of its kind to address numerous potential applications such as the technology of high-voltage insulation in pulsed inhomogeneous fields, and applications related to cavitation development in liquid dielectrics, treatment of different materials and plasma medicine. This second edition addresses the development of the theory over the past few years and features extensive revisions, as well as some expanded chapters. A new inclusion is an explanation of how the critical pressure at which cavitation is initiated is determined according to the surface tension coefficient at the boundary of small nanovoids and microbubbles. Discussion of the quantum mechanical nature of the cavitation inception in liquid helium is also provided, along with the derived values of critical negative pressure for the appearance of cavitation, and its characteristics at low temperatures.
Download or read book Electric Breakdown of Liquid Dielectrics written by K. C. Kao and published by . This book was released on 1957 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Alternative Liquid Dielectrics for High Voltage Transformer Insulation Systems written by U. Mohan Rao and published by John Wiley & Sons. This book was released on 2021-12-01 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive reference and guide on the usage of the alternative dielectric fluids for transformer insulation systems Liquid-filled transformers are one of the most important and expensive components involved in the transmission and distribution of power to industrial and domestic loads. Although petroleum-based insulating oils have been used in transformers for decades, recent environmental concerns, health and safety considerations, and various technical factors have increased the need for new alternative and biodegradable liquids. Alternative Liquid Dielectrics for High Voltage Transformer Insulation Systems is an up-to-date reference and guide on natural and synthetic ester-based biodegradable insulating liquids. Covering the operational behavior, performance analysis, and maintenance of transformers filled with biodegradable insulating liquids, this comprehensive resource helps researchers and utility engineers expand their knowledge of the benefits, challenges, and application of ester-filled transformers. In-depth chapters written by experienced researchers addresses critical topics including transformer condition monitoring, high voltage insulation testing, biodegradable insulating material processing and evaluation, and more. A unique and significant contribution to existing literature on the subject, this authoritative volume: • Covers condition monitoring, diagnostic testing, applications, maintenance, and in-service experiences • Explores current challenges and future prospects of ester-filled transformers • Discusses significant research progress and identifies the topics in need of further emphasis • Compares the differences and similarities between mineral oils and ester liquids • Includes in-depth behavioral observations and performance analysis of ester-based insulating liquids Alternative Liquid Dielectrics for High Voltage Transformer Insulation Systems: Performance Analysis and Applications is a must-have reference for utility engineers, electrical power utilities, transformer owners, manufacturers, and researchers.
Download or read book Conduction and breakdown in dielectric liquids written by J.M. Goldschvartz and published by Springer. This book was released on 1975 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the 5th international conference on conduction and breakdown of dielectric liquids is the same as that of the preceding conferences, namely to have a forum where all experts in this vast field can meet, can present their latest results and can exchange their ideas. It comes within this framework that the subjects of this conference cover the whole field of conduction and breakdown of polar and non polar liquids, including cryogenic liquids. In comparison with many other international conferences this is a relatively small one. This fact has the great advantage that all participants can be lodged in the congress centre "De Leeuwenhorst" at Noordwijkerhout. The result is that everybody who wants to talk about a problem with a colleague can easily contact him and make an appointment. When the organizing committee, whose members are J.M. Goldschvartz, chairman, A.K. Niessen and W.Boone began their task, the first idea was to organize the conference in the Aula complex of the Delft University of Technology, since the conference is sponsored by the Department of Applied Physics of the university. Then the participants had to be lodged not only in Delft but also in surrounding towns as the number of hotel beds in Delft is very limited. Thus, the decision to move into "De Leeuwenhorst" was practical and wise.
Download or read book Electric Breakdown of Liquid Dielectrics written by Bahman Farazmand and published by . This book was released on 1959 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrical Insulating Liquids written by and published by ASTM International. This book was released on 1994 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Mechanism of Electric Breakdown in Liquid Dielectrics written by L. Inge and published by . This book was released on 1935 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Electrical Breakdown of Liquid Dielectrics written by and published by . This book was released on 1951 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrical Breakdown of Liquid Dielectrics written by Kenneth S. B. Lindsay and published by . This book was released on 1935 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on 1975 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Charge Transport and Breakdown Physics in Liquid solid Insulation Systems written by Jouya Jadidian and published by . This book was released on 2013 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid dielectrics provide superior electrical breakdown strength and heat transfer capability, especially when used in combination with liquid-immersed solid dielectrics. Over the past half-century, there has been extensive research characterizing "streamers" in order to prevent them, as they are the main origins of electrical breakdown in liquid dielectrics. Streamers are conductive structures that form in regions of liquid dielectrics that are over-stressed by intense electric fields. Streamers can transform to surface flashovers when they reach any liquid-immersed solid insulation. Surface flashovers usually propagate faster and further than streamers in similar electric field intensity. Charge generation and transport is crucially important in liquid dielectric breakdown, since without the presence of the electric charge and its ability to migrate in the liquid dielectric volume and on the interface of liquid/solid dielectrics, streamers and surface flashovers are unable to develop. In this thesis, we develop a finite element method transport model in one, two and threedimensional geometries to help understand the complicated dynamics of electric charge transport and streamer breakdown in liquid dielectrics. This electrohydrodynamic model clarifies many of the mechanisms behind streamer/surface flashover formation, propagation and branching in typical liquid/solid dielectric composite systems. Several key mechanisms have been identified and added to the transport model of streamers, such as effects of electric field intensity on the ionization potential of liquid dielectric molecules and electron velocity saturation, which make the modeling results more realistic. In addition to improving the understanding of electrical breakdown physics in liquid-based insulation systems, a significant effort is made throughout this thesis research to enhance the stability, convergence, speed and accuracy of the model, making it a convenient and reliable tool for designing high voltage components that contain pure liquid dielectrics, nanofluids and liquid immersed insulation systems. This model, for the first time, is able to treat any given electrode shape and gap distance as well as any applied voltage waveform with accurate results, which provides a convenient preliminary way to verify the performance of an insulation system in terms of breakdown voltage, time to breakdown, electric field intensity distribution and ionization level. The model precision is validated through experimental records, analytical solutions and alternative modeling approaches wherever available. Specifically, we verify our one-dimensional numerical results with exact analytical solutions, and our two and three-dimensional modeling results with experimental data found in the literature or provided by ABB Corporate Research, Sweden. The streamer initiation voltages, number of streamer branches, breakdown voltages and currents are in excellent agreement with the experimental data compared to the prior theoretical research on liquid breakdown physics. Identical results obtained using a finite volume method also confirm the correctness of the finite element approach used in this thesis. The presented model can be employed to search for novel configurations of liquid immersed insulation systems including nanofluids and liquid/solid composite systems.
Download or read book Liquid Dielectrics written by Andrew Gemant and published by . This book was released on 1933 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gaseous Dielectrics VI written by Loucas G. Christophorou and published by Springer. This book was released on 2012-10-21 with total page 651 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Sixth International Symposium on Gaseous Dielectrics was held in Knoxville, Tennessee, U.S.A., on September 23-27, 1990. The symposium continued the trans disciplinary character and comprehensive approach of the preceding five symposia. Gaseous Dielectrics VI is a detailed record of the symposium proceedings. It covers recent advances and developments in a wide range of basic, applied and industrial areas of gaseous dielectrics. It is hoped that Gaseous Dielectrics VI will aid future research and development in and encourage wider industrial use of gaseous dielectrics. The Organizing Committee of the Sixth International Symposium on Gaseous Dielectrics consisted of L. G. Christophorou (U.S.A.), F. Y. Chu (Canada), A. H. Cookson (U.S.A.), D. L. Damsky (U.S.A.), O. Farish (U.K.), I. Gallimberti (Italy), A. Garscadden (U.S.A.), E. Marode (France), T. Nitta (Japan), W. Pfeiffer (Germany), I. Sauers (U.S.A.), R. J. Van Brunt (U.S.A.), and W. Zaengl (Switzerland). The local arrangements committee consisted of members of the Health and Safety Research Division and personnel of the Conference Office of the Oak Ridge National Laboratory, and staff of the University of Tennessee (UTK). The contributions of each member of these committees, the work of the Session Chairmen, the interest of the participants, and the advice of innumerable colleagues are gratefully acknowledged.
Download or read book ICDL written by International Conference on Conduction and Breakdown in Dielectric Liquids and published by . This book was released on 1996 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Voltage and Electrical Insulation Engineering written by Ravindra Arora and published by John Wiley & Sons. This book was released on 2022-03-10 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: High Voltage and Electrical Insulation Engineering A comprehensive graduate-level textbook on high voltage insulation engineering, updated to reflect emerging trends and techniques in the field High Voltage and Electrical Insulation Engineering presents systematic coverage of the behavior of dielectric materials. This classic textbook opens with clear explanations of fundamental terminology, electric-field classification, and field estimation techniques. Subsequent chapters describe the field dependent performance of gaseous, vacuum, liquid, and solid dielectrics under different classified field conditions, and illustrate the monitoring of electrical insulation conditions by both single and continuous online methods. Throughout the text, numerous tables, figures, diagrams, and images are provided to strengthen understanding of all material. Fully revised to incorporate the most current technological application techniques, the second edition offers an entirely new section on condition monitoring of electrical insulation. Updated chapters discuss recent developments in gas-filled power apparatus, present-day trends in the use replacement of liquid insulating materials, the latest applications of new solid dielectrics in high voltage engineering, vacuum technology and liquid insulating materials, and more. This edition features a brand-new case study exploring the estimation of clearance requirements for 25 kV electric traction. Readers will also find the new edition: Provides new coverage of advances in the field, such as the application of polymer insulators and the use of SF6 gas and its mixtures in gas-insulated systems/substations (GIS) Uses a novel approach that explores the field dependent behavior of dielectrics Explains the “weakly nonuniform field,” a unique concept introduced both conceptually and analytically in Germany A separate chapter provides the new approach to the mechanism of lightning phenomenon, which also includes the phenomenon of “Ball Lightning” The dielectric properties of vacuum and the development in the application of vacuum technology in power circuit breakers is covered in an exclusive chapter In-depth coverage of the performance of the sulphur-hexafluoride gas and its mixtures applicable to the design of Gas Insulated Systems including dry power transformers High Voltage and Electrical Insulation Engineering, Second Edition, remains the perfect textbook for graduate students, teachers, academic researchers, and utility and power industry engineers and scientists involved in the field.
