The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Boris I. Katorgin - One of the best experts on this subject based on the ideXlab platform.
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new 30 m flexible hybrid energy transfer line with liquid hydrogen and Superconducting hbox mgb _ 2 Cable development and test results
IEEE Transactions on Applied Superconductivity, 2015Co-Authors: V.s. Vysotsky, Evegny V. Blagov, Valery V. Kostyuk, Alexander A. Nosov, Sergey S. Fetisov, Sergey Yu. Zanegin, Ilya V. Antyukhov, Valery P. Firsov, Grigory G. Svalov, Boris I. KatorginAbstract:In the framework of the second stage of the Russian R&D program for the development of hybrid energy transfer lines (HETLs), the new 30-m $\hbox{MgB}_{2}$ Superconducting Cable with high voltage insulation has been developed and tested. The Superconducting Cable was inserted into a newly developed flexible 30-m hydrogen cryogenic line that has three sections with different types of thermal insulation in each section. High-voltage current leads were also developed. The Superconducting Cable, cryostat, and current leads have been tested in October 2013. Cable critical current was $\sim$ 3500 A at $\sim$ 21 K. Cable and current leads passed a high voltage test with 50-kV dc at liquid hydrogen temperature. The tests were performed at temperatures from 20 to 26 K, hydrogen flow from 70 to 450 g/s, and pressure from 0.25 to 0.5 MPa. It was found that the active evaporating cryostatting system as a thermal insulation practically eliminated heat transfer from room temperature to liquid hydrogen. The flexible 30-m HETL developed is able to deliver $\sim$ up to 60 MW of chemical power and $\sim$ 75 MW of electrical power, i.e., $\sim$ 135 MW in total. $\hbox{MgB}_{2}$ Cable design and test results of hybrid energy transfer lines are presented and discussed.
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New 30-m Flexible Hybrid Energy Transfer Line With Liquid Hydrogen and Superconducting $\hbox{MgB}_{2}$ Cable—Development and Test Results
IEEE Transactions on Applied Superconductivity, 2015Co-Authors: Vitaly S. Vysotsky, Evegny V. Blagov, Valery V. Kostyuk, Alexander A. Nosov, Sergey S. Fetisov, Sergey Yu. Zanegin, Ilya V. Antyukhov, Valery P. Firsov, Grigory G. Svalov, Boris I. KatorginAbstract:In the framework of the second stage of the Russian R&D program for the development of hybrid energy transfer lines (HETLs), the new 30-m MgB2 Superconducting Cable with high voltage insulation has been developed and tested. The Superconducting Cable was inserted into a newly developed flexible 30-m hydrogen cryogenic line that has three sections with different types of thermal insulation in each section. High-voltage current leads were also developed. The Superconducting Cable, cryostat, and current leads have been tested in October 2013. Cable critical current was ~3500 A at ~21 K. Cable and current leads passed a high voltage test with 50-kV dc at liquid hydrogen temperature. The tests were performed at temperatures from 20 to 26 K, hydrogen flow from 70 to 450 g/s, and pressure from 0.25 to 0.5 MPa. It was found that the active evaporating cryostatting system as a thermal insulation practically eliminated heat transfer from room temperature to liquid hydrogen. The flexible 30-m HETL developed is able to deliver ~ up to 60 MW of chemical power and ~75 MW of electrical power, i.e., ~135 MW in total. MgB2 Cable design and test results of hybrid energy transfer lines are presented and discussed.
Masaru Tomita - One of the best experts on this subject based on the ideXlab platform.
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FCL Effect of DC Superconducting Cables in Unsteady State
IEEE Transactions on Applied Superconductivity, 2017Co-Authors: Taichi Nishihara, Tsutomo Hoshino, Masaru TomitaAbstract:DC Superconducting Cables for railway systems connected between substations have been developed. If the length of the Superconducting Cable is long enough, the Superconducting Cable is expected to have an effect of a resistive type fault current limiter (FCL) by the transition of the Superconducting state and the normal state due to overcurrent than the critical current. Therefore, the simulation model of a direct current system with Superconducting Cables was constructed and the behavior of a Superconducting Cable was analyzed. And, there is a possibility of deterioration of critical current in a Superconducting Cable due to the aging and unexpected stresses since a Superconducting Cable is assumed to operate for long term. Then, the behavior of a deteriorated Superconducting Cable in the unsteady state was also analyzed. The analyzed results suggest that the 3000-m-long Superconducting Cable has the FCL effect and the temperature distribution assuming operation at liquid nitrogen does not affect the FCL effect. Furthermore, influence of the local deterioration, which has a potential to damage a Superconducting Cable in the unsteady state, could be estimated using this constructed model.
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High Temperature Superconducting Cable for Railway System
Quarterly Report of Rtri, 2013Co-Authors: Masaru Tomita, Yusuke Fukumoto, Atsushi Ishihara, Kenji Suzuki, Tomoyuki Akasaka, Yusuke KobayashiAbstract:In this paper, the authors present their design for the first prototype DC Superconducting Cable for feeding railway overhead contact wire systems. The Superconducting Cables will reduce the high resistive losses generated in the feeding system. For the preliminary evaluation, 2 m Bi-2223 DC Cable is used. Results showed the maximum current flowing in the Cable cooled by liquid nitrogen to be 1720A in the inner sheet wire and 2430 in the outer sheet. Leakage of magnetic field was determined to be negligible, and the authors conclude that the developed DC Superconducting Cables are reliable for use in railway systems.
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next generation of prototype direct current Superconducting Cable for railway system
Journal of Applied Physics, 2011Co-Authors: Masaru Tomita, Yusuke Fukumoto, Atsushi Ishihara, Kenji Suzuki, Manapuram MuralidharAbstract:The authors design and develop a prototype DC Superconducting Cable for railways. For the preliminary evaluation 2 m Bi-2223 DC Cable is used. The maximum current flowing in the Cable cooled by liquid nitrogen was 1720 A in the inner sheet wire and 2430 A in the outer sheet. The experimental results and simulations led to the conclusion important for practical applications that the leakage of magnetic field was negligible. This result is of crucial importance, in particular for use in railway systems.
Manapuram Muralidhar - One of the best experts on this subject based on the ideXlab platform.
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next generation of prototype direct current Superconducting Cable for railway system
Journal of Applied Physics, 2011Co-Authors: Masaru Tomita, Yusuke Fukumoto, Atsushi Ishihara, Kenji Suzuki, Manapuram MuralidharAbstract:The authors design and develop a prototype DC Superconducting Cable for railways. For the preliminary evaluation 2 m Bi-2223 DC Cable is used. The maximum current flowing in the Cable cooled by liquid nitrogen was 1720 A in the inner sheet wire and 2430 A in the outer sheet. The experimental results and simulations led to the conclusion important for practical applications that the leakage of magnetic field was negligible. This result is of crucial importance, in particular for use in railway systems.
V.s. Vysotsky - One of the best experts on this subject based on the ideXlab platform.
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new 30 m flexible hybrid energy transfer line with liquid hydrogen and Superconducting hbox mgb _ 2 Cable development and test results
IEEE Transactions on Applied Superconductivity, 2015Co-Authors: V.s. Vysotsky, Evegny V. Blagov, Valery V. Kostyuk, Alexander A. Nosov, Sergey S. Fetisov, Sergey Yu. Zanegin, Ilya V. Antyukhov, Valery P. Firsov, Grigory G. Svalov, Boris I. KatorginAbstract:In the framework of the second stage of the Russian R&D program for the development of hybrid energy transfer lines (HETLs), the new 30-m $\hbox{MgB}_{2}$ Superconducting Cable with high voltage insulation has been developed and tested. The Superconducting Cable was inserted into a newly developed flexible 30-m hydrogen cryogenic line that has three sections with different types of thermal insulation in each section. High-voltage current leads were also developed. The Superconducting Cable, cryostat, and current leads have been tested in October 2013. Cable critical current was $\sim$ 3500 A at $\sim$ 21 K. Cable and current leads passed a high voltage test with 50-kV dc at liquid hydrogen temperature. The tests were performed at temperatures from 20 to 26 K, hydrogen flow from 70 to 450 g/s, and pressure from 0.25 to 0.5 MPa. It was found that the active evaporating cryostatting system as a thermal insulation practically eliminated heat transfer from room temperature to liquid hydrogen. The flexible 30-m HETL developed is able to deliver $\sim$ up to 60 MW of chemical power and $\sim$ 75 MW of electrical power, i.e., $\sim$ 135 MW in total. $\hbox{MgB}_{2}$ Cable design and test results of hybrid energy transfer lines are presented and discussed.
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Current redistribution between strands and quench process in a Superconducting Cable
Cryogenics, 1996Co-Authors: N.a. Buznikov, A. A. Pukhov, A. L. Rakhmanov, V.s. VysotskyAbstract:The influence of current redistribution between strands on the quench process in a Superconducting Cable is studied. A theoretical model is developed which accounts for non-uniformities in strands. In agreement with experimental data, the model predicts that three different current redistribution modes may be observed in the Cable, depending on the initial current; namely the current sharing mode, and slow and fast quench modes. It is shown that fast current redistribution can initiate multiple normal zone nucleation in strands. This phenomenon is responsible for an abnormally large normal zone propagation velocity. The results obtained are of importance for understanding the quench process in multistrand Superconducting Cables.
Jacob Ostergaard - One of the best experts on this subject based on the ideXlab platform.
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operation experiences with a 30 kv 100 mva high temperature Superconducting Cable system
Superconductor Science and Technology, 2004Co-Authors: Ole Tonnesen, M. Daumling, Kim Hoj Jensen, Svend Kvorning, Soren Kruger Olsen, Chresten Traeholt, E Veje, Dag Willen, Jacob OstergaardAbstract:A Superconducting Cable based on Bi-2223 tape technology has been developed, installed and operated in the public network of Copenhagen Energy in a two-year period between May 2001 and May 2003. This paper gives a brief overview of the system and analyses some of the operation experiences. The aim of this demonstration project is to gain experience with HTS Cables under realistic conditions in a live distribution network. Approximately 50 000 utility customers have their electric power supplied through the HTS Cable. The Cable system has delivered 226 GW h of energy and reached a maximum operating current of 1157 A. The operation experiences include over-currents of 6 kA due to faults on peripheral lines, commissioning, servicing and failure responses on the cooling system, continuous 24 h, 7 day per week monitoring and performance of the alarm system. The implications of these experiences for the future applications of HTS Cable systems are analysed.
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loss and inductance investigations in a 4 layer Superconducting prototype Cable conductor
IEEE Transactions on Applied Superconductivity, 1999Co-Authors: Soren Kruger Olsen, A. Kuhle, M. Daumling, Ole Tonnesen, Chresten Traeholt, Jacob OstergaardAbstract:One important issue in the design and optimization of a Superconducting Cable conductor is the control of the current distribution between single tapes and layers. This presentation is based on a number of experiments performed on a 4-layer three meter long prototype Superconducting Cable conductor. The self and mutual inductances of the layers are studied theoretically. The current distribution between the Superconducting layers is monitored as a function of transport current. The results are compared with the expected current distribution given by the authors' equivalent electrical circuit model. The AC losses are measured as a function of transport current and a given current distribution and compared with the monoblock model. Recommendations for design of future Cable conductor prototypes are given.
