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Sotnikov D.V.,SuperOx Company | Fetisov S.S.,Russian Scientific R and D Cable Institute | Radchenko I.P.,Russian Scientific R and D Cable Institute | Chepikov V.N.,SuperOx Company | And 3 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2016

Progressive advance in technology of second-generation (2G) high-temperature superconducting (HTS) superconductors leads to the continuous rise of their critical-current density. Critical current of 200 A at 4-mm tapes and ∼600 A at 12-mm tapes is already state of the art. One problem is that critical currents of HTS tapes have sounding anisotropy. Moreover, it was found that in external magnetic field, the Lorentz force direction is affecting the critical currents of 2G HTS tapes. Two hypotheses were suggested as a reason for this phenomenon. This is the result of the properties of crystal lattice in a 2G HTS tape or of spatial inhomogeneity of critical currents across the width of HTS tapes. In this paper, the verification of hypotheses was done by the cutting of wide 2G HTS tapes into narrow tapes and measuring of critical-current anisotropy in narrowed tapes. We present the experimental results and their discussion. We concluded that the spatial inhomogeneity of critical-current density in the cross section of a tape is the reason for the Lorentz force direction influence on the anisotropy of 2G HTS tape critical currents. © 2002-2011 IEEE.


Volkov E.P.,Krzhizhanovsky Energy Institute | Vysotsky V.S.,Russian Scientific R and D Cable Institute | Firsov V.P.,Moscow Aviation Institute
Physica C: Superconductivity and its Applications | Year: 2012

The Russian R&D Program for superconducting power devices is underway, supported both by government and electric power companies. In this program R&D on HTS power cables is considered as most advanced and close to commercialization. In the framework of the program, several, heavily instrumented, 5 m cables have been tested following by the 30 m - 3 phase experimental power cable development and testing in 2008-2009. The latest achievement is development and testing of the first long length 3 × 200 m power cable with rating 1.5/2 kA-20 kV. In parallel with just the cable development the innovative cryogenic system has been developed as well for the cable cooling. The system is using neon as working substance and radial turbo-machines in refrigerator. Cooling power is up to ∼8 kW at 65 K, inter-maintenance time ∼30,000 h. The cryogenic pump with superconducting motor can be used to provide subcooled liquid nitrogen flow ∼0.1-1.5 kg/s at 0.1-2.5 MPa pressure. After extensive tests at special test facility, HTS power cable and cryogenic system are planning to be installed at some substation in Moscow utility grid. In this review some details about Russian HTS power application program, 200 m cable and cryogenic system designs and tests results are presented.


Nosov A.A.,Russian Scientific R and D Cable Institute | Fetisov S.S.,Russian Scientific R and D Cable Institute | Zubko V.V.,Russian Scientific R and D Cable Institute | Polyakova N.V.,Russian Scientific R and D Cable Institute | And 4 more authors.
Physics Procedia | Year: 2012

1.5/2 kA - 20 kV has been developed and passed acceptance test in December 2009. This cable has superconducting shield and is made of DI-BSSCOTM HT-CA wires from Sumitomo Electric Company. The cable is installed at the experimental test facility to undergo extensive tests first, than it will be reinstalled to Moscow utility grid. As a part of the wide test program the fault current tests and high voltage tests were performed with pieces of the full length cable - so called witness samples. 44 kA fault current test has been performed as well as high voltage test for cable's insulation. In this paper the results of fault current test and high voltage test are presented, discussed and analyzed. ©2012 Published by Elsevier B.V. Selection and/or peer-review under responsibility of the Guest Editors.


Sytnikov V.E.,Russian Scientific R and D Cable Institute | Vysotsky V.S.,Russian Scientific R and D Cable Institute | Fetisov S.S.,Russian Scientific R and D Cable Institute | Nosov A.A.,Russian Scientific R and D Cable Institute | And 6 more authors.
AIP Conference Proceedings | Year: 2010

In the framework of the Russian R&D Program for HTS power devices, 3×30m cable with operating current of ∼1.5-2 kA and operating voltage of 20 kV was delivered by Russian Scientific R&D Cable Institute as the first stage of the HTS power cables project. Different basic HTS materials, cryostats and current leads were used for the cable design in this essentially research part of the project. The cable is being tested at special test facility for superconducting power devices developed at the R&D Center for Power Engineering. The cryogenic system for the test facility was provided by Stirling. The basic cryogenic system was equipped with a specially developed flow distribution unit. This unit permits variation and control of liquid nitrogen flows, pressures and temperatures in all three cable phases. Dependencies on temperature of critical currents of each phase were measured during cable tests. The results of the project]s first stage were used to develop and produce a 3×200m cable system for Moscow distribution grid. In the paper results of cryogenic system tests and cable electrical tests are presented. © 2010 American Institute of Physics.


Vysotsky V.S.,Russian Scientific R and D Cable Institute | Radchenko I.P.,Russian Scientific R and D Cable Institute | Fetisov S.S.,Russian Scientific R and D Cable Institute | Sytnikov V.E.,Russian Scientific R and D Cable Institute | Zubko V.V.,RAS Institute for High Energy Physics
Journal of Physics: Conference Series | Year: 2010

Most prospective 2G HTS are asymmetric in cross section due to technology feature. Superconducting layer is located more close to one side of a tape, while from the other side highly resistive substrate is located. Thus, it is possible to combine two 2G HTS tapes with different mutual orientations of superconducting layers. In this work we studied voltage current characteristics (VCC) of eight samples made of two soldered HTS tapes (copper coated SCS4050 tapes from Super Power Inc.). Connection of samples to terminations varied as well. VCC measured were different depending on tapes' combining method, joint to terminations and external magnetic fields. Peculiarities on VCC were indicated a current transfer between tapes. Possible explanation of the phenomenon is discussed also. © 2010 IOP Publishing Ltd.


Vysotsky V.S.,Russian Scientific R and D Cable Institute | Nosov A.A.,Russian Scientific R and D Cable Institute | Fetisov S.S.,Russian Scientific R and D Cable Institute | Svalov G.G.,Russian Scientific R and D Cable Institute | And 6 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2013

The transfer of massive amounts of both electrical and chemical power over long distances will present a major challenge for the global energy enterprise in the future. Attraction of hydrogen is apparent as a chemical energy agent, possessing among the highest energy density content of various common fuels, whose combustive 'waste' is simply water. It could be transferred via cryogenic tubes being liquid at temperatures \sim18-26 K. The usage of 'gratis' cold to cool a superconducting cable made of a proper superconductor permits to deliver extra electrical power with the same line. In this paper, we describe the experimental modeling of this concept via a combined MgB2-cryogenic dc superconducting cable refrigerated by 'singlet' phase liquid hydrogen. We present the design, construction details, and test results of a 10-m prototype, focusing on choice of MgB2 cable and cryostat technologies. We also discuss the opportunities and possibilities for future practical deployment of such hybrid energy delivery systems. © 2002-2011 IEEE.


Fetisov S.S.,Russian Scientific R and D Cable Institute | Vysotsky V.S.,Russian Scientific R and D Cable Institute | Zubko V.V.,Russian Scientific R and D Cable Institute
IEEE Transactions on Applied Superconductivity | Year: 2011

The behavior HTS materials and devices at overload currents is determined in a very high level by cooling, particularly, by the transient heat transfer from HTS device to liquid nitrogen. Recently we observed sharp peaks in the voltage during rectangular current pulse. In the present paper we explain these peaks by analysis of transient regimes in liquid nitrogen. The sharp peak in the voltage is occurring after temperature exceeds certain level before nucleate boiling starts. Basing on measurements of the voltage and temperature of HTS tapes during current overload and numerical analysis ofthe process weestimated overheat temperatures of nitrogen in transient regimes. Influence of covers of HTS tapes on overheat temperature of nitrogen is discussed. Experimental data and theoretical calculations' are compared. © 2010 IEEE.


Fetisov S.S.,Russian Scientific R and D Cable Institute | Zubko V.V.,Russian Scientific R and D Cable Institute | Nosov A.A.,Russian Scientific R and D Cable Institute | Polyakova N.V.,Russian Scientific R and D Cable Institute | Vysotsky V.S.,Russian Scientific R and D Cable Institute
Physics Procedia | Year: 2012

AC losses are an important issue in HTS power cables development especially when using low loss 2G wires. Still not so much experimental studies were performed on this subject with representative cables' models. For cables made from 1G wires some theoretical models adequately describes losses while they does not works well enough for 2G AC losses. To study the problem, the test facility and AC loss measurement methods with 5 m HTS model cables have been developed in Russian Cable Institute. Several 5 m HTS cables made of both 1-G and 2-G wires have been produced and tested at this facility. 2-G cables have different substrates both weakly magnetic and nonmagnetic once. In this paper we present data obtained for AC loss in HTS power cable models. Theoretical analysis of losses has been done as well, including substrate losses and the losses in a superconductor. Superconducting losses dominate in cables made of 1G HTS wires, while in 2G cables magnetic substrate may dominate at low currents. Several mechanisms affected AC losses due to parallel and perpendicular magnetic fields in a cable are taken into account. Theoretical and experimental data are compared and discussed. © 2011 Published by Elsevier B.V. Selection and/or peer-review under responsibility of the Guest Editors.


Vysotsky V.S.,Russian Scientific R and D Cable Institute | Nosov A.A.,Russian Scientific R and D Cable Institute | Fetisov S.S.,Russian Scientific R and D Cable Institute | Shutov K.A.,Russian Scientific R and D Cable Institute
IEEE Transactions on Applied Superconductivity | Year: 2011

The test facility developed in Russian Scientific R&D Cable Institute permits to perform extensive tests of heavily instrumented HTS cable models with length up to 5 m. Several HTS cables with different design have been developed and tested at this facility. The test programs included, besides usual critical current measurements, current distribution measurements among layers, joint resistance test, etc. The facility's equipment permits digital measurements of voltage and current with high accuracy and, therefore, digital ac loss analysis in model cables. In this paper we present the details of the test facility and results of tests and ac loss measurements in few 5 m model cables. ac losses in model cables made of 1 G and 2 G wires and other cable parameters are discussed and compared. © 2010 IEEE.

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