The incomplete center was a slug of covered silicon steel. This document describes the 630 kva hts transformer project made by abb jointly with edf and asc. A low voltage, mains frequency, partial core, high. The reverse design model is discussed followed by the model parameters that are used in designing the high temperature superconducting partial core transformer. If a 40 mva transformer with a high temperature superconducting winding is considered, short circuit should be cleared after 100 ms without. Evaluation of an efficiencent transformer core design poonam lutchman a dissertation submitted to the faculty of engineering and the built environment, university of the witwatersrand, in fulfilment of the requirements of the degree of master of science in engineering. Does ornl part of initiative for superconducting transformer august 31, 1998 a superconductivity partnership initiative to be signed tuesday by the department of energy doe and waukesha electric systems is a mega boost toward nextgeneration transformers that. The windings were layer twisted with bi2223 hts wire. Introduction the development of hightemperature superconducting power apparatus has made remarkable progress during the last several years. Development ofhigh temperature superconducting machines. High temperature superconductors hts for energy applications. Abstract the chapter provides an overview of power applications of high temperature superconductivity hts with emphasis on superconducting transformers.
This discovery sparked international efforts to improve the properties of the new high temperature. Electrical measurements cryogenic transformers cmrdirect. The goal of this work is the comparison of the efficiency and the annual energy losses of a superconducting from 2g high temperature superconductors and. The transformer consists of a corefree 10 464 turn primary solenoid which is enclosed by a 6. A new 15kva, 230230 v, high temperature superconducting hts, partialcore transformer has been designed, built, and tested. Selected hightemperature superconducting electric power. High temperature superconducting hts transformers for. Oct 11, 2001 high temperature superconducting cables are defined as are the different types, warm dielectric and cryogenic dielectric. An experimental high temperature superconducting transformer has been designed and built using bi2223 hts tape. Since 1911, plenty of superconducting materials have been discovered. Fast hightemperature superconductor switch for high current.
Design optimization of hightemperature superconducting. Fast hightemperature superconductor switch for high. The paper deals with a superconducting traction transformer. In 2004, cryomagnetics completed and successfully tested a 3. Parameters of hightemperature superconducting transformers. Parameters of the high temperature superconducting htsc transformer with a coretype magnetic circuit and with coaxial and symmetrical interleaved windings made of the firstgeneration htsc wire with a localized magnetic field are considered. Pdf a lowvoltage, mains frequency, partial core, high. First, a copper mockup of the superconducting transformer was designed where the mockup would have the same tape and winding dimensions. If you continue without changing your settings, we will assume that you are happy to receive cookies on the university of southampton website. In superconducting materials, the superconducting state exists as long as temperature t, current i, and magnetic field b are below their critical values t c, i c and b c. High temperature superconducting transmission cables. Index terms hightemperature superconductors, optimization methods, power transformers. The temperature that defines each is the level to which the conductors need to be cooled in order to become superconducting. A high temperature superconducting fault current limiter sfcl can be solution to reduce the level of shortcircuit current during fault.
Abstractwe describe the hightemperature superconducting. The transformer utilizes a unique core design called partial core. A new 15kva, 230230 v, high temperature superconducting, partialcore transformer has been designed, built, and tested. High temperature superconducting cable for power transmission applications. Development ofhigh temperature superconducting machines jian xun jini, lu hai zheng 1, you guang gu0 2and jian guo zhu2 centerofapplied superconductivity and electrical engineering, university ofelectronic science and technology ofchina, china 2faculty ofengineering, university oftechnology, sydney, australia. Hts transformers offer the possibility of operating with. The project started in october 1996 and ended in september 2001. High temperature superconducting partial core transformer. Mar 24, 2014 we describe the high temperature superconducting hts transformer project run by siemens. Status of high temperature superconducting magnet development. Pdf hightemperature superconducting hts transformer. All superconducting materials known at ordinary pressures currently work far below ambient. Electrical power engineering, school of electronics and computer science. Pdf an experimental high temperature superconducting.
Its principal focus is on commercially available materials, and it aims to provide the most comprehensive performance data available, enabling informed materials selection and the efficient modelling, design and construction of. Superconducting transformers for study of highcurrent. With its distinguished editor and international team of expert contributors, high temperature superconductors hts for energy applications is an invaluable reference tool for anyone involved or interested in hts materials and their application in energy systems, including materials scientists and electrical engineers, energy consultants, hts. High temperature superconducting partial core transformers. The early development of high temperature superconducting partial core transformers at the university of canterbury is then examined. High temperature superconducting cable for power transmission. A hightemperature superconducting hts wire critical. Hts high temperature superconductor cryomagnetics, inc. This ring position is stable to tilt and horizontal displacements, thus reducing the control power requirements for. Michael gouge, ornl gcep advanced electricity infrastructure workshop stanford university november 1, 2007. This setup can reduce potentially occurring short circuits to less than 50% of the prospective values within a few milliseconds. For a transformer, the annual energy loss depends on the loaddependent efficiency of the transformer and the characteristic load curve at the specific location in the grid or elsewhere.
Possible mechanisms for superconductivity in the cuprates continue to be the subject of considerable debate and further research. The temperature which characterizes each is the level to which the conveyors should be cooled keeping in mind the end goal to end up superconducting. A hightemperature superconducting transformer with localized. Early partial core development is discussed followed by some material testing at cryogenic temperatures. In the late eighties, a new class of ceramic oxides was discovered with superconducting properties above the boiling point of liquid nitrogen. A new 15kva, 230230 v, hightemperature superconducting hts, partialcore transformer has been designed, built, and tested. Saturated iron core sfcl, uses ltss where inductivesfcl and resistivesfcl are usually designed by htss. The switch makes a superconductingtonormal transition within 5ms and also has. Losses in windings of superconducting traction transformer. Psfcja1045 status of high temperature superconducting magnet development l. A superconducting transformer system for high current. The modelling was used to predict the performance of the transformer as well as the ac losses of the high temperature superconductor.
The primary dissipates power mainly because of its electrical resistance. Superconducting transformer design and construction core. University of southampton, southampton so17 1bj, uk. High temperature superconducting hts no insulation ni coil is a promising design because of high current density, high thermal stability, and selfprotection mechanism. High temperature superconducting cables are defined as are the different types, warm dielectric and cryogenic dielectric. This database comprises high temperature superconducting hts wire performance data measured at the robinson research institute of victoria university of wellington. Ieee transactions on applied superconductivity, 18 2, 636639. They proposed low temperature tapelike superconductors thick films. The aim of the project was to show the future prospects for superconducting railway transformers. A hightemperature superconducting transformer with. A new design of a 15kva single phase full core superconducting transformer, operating in liquid nitrogen, is presented. A lowvoltage, mains frequency, partial core, high temperature, superconducting transformer article pdf available january 2005 with 354 reads how we measure reads. Temperature superconducting transformers wiley online library. Low and medium frequency ranges for ac resistitivity and ac susceptibility, high frequency variants for use in superconducting bolometer matching applications.
An innovative transformer concept using ceramic high temperature superconductors instead of copper as winding material could reduce the transformer losses almost to zero. Yanagic amit plasma science and fusion center cnational institute for fusion science b tohoku university, sendai, japan december 2010 supported in part by us doe office of fusion energy sciences. The transformer is unique in that the magnetic circuit is comprised of air and a. Oct 22, 2007 the primary dissipates power mainly because of its electrical resistance. One valve is a full ln2 rated manual vent to be used.
Parameters of the hightemperature superconducting htsc transformer with a coretype magnetic circuit and with coaxial and symmetrical interleaved windings made of the firstgeneration htsc wire with a localized magnetic field are considered. A new 15kva, 230230 v, hightemperature superconducting, partialcore transformer has been designed, built, and tested. The superconducting transition temperature has been found to peak at an optimal doping value p0. High temperature superconducting hts transformers, defined by highcurrent density hts conductors and liquid nitrogen dielectric, have many potential advantages over conventional oilimmersed transformers, such as smaller, lighter, more efficient, low fire and environmental hazard, overload capability without reduction in lifetime, low output. The reverse design model is discussed followed by the model parameters that are used in. Market for hightemperature superconducting wire in transmission cable applications during the week of april 2327, 1994, donn forbes, a market researcher and business consultant with clients involved in superconductivity, conducted telephone interviews with 23 utility engineers concerning the future prospects for hightemperature. Furthermore, in early 1987 tanaka 7 pointed shoji tanaka director general superconductivity research laboratory 110 shinonome kotoku, tokyo 50062, japan hightemperature superconductivity. We use cookies to ensure that we give you the best experience on our website. In a superconducting transformer the primary dissipates no power except for a small electromagnetic radiation term, so near 100% efficiency can be obtained with no core at all. Experimental superconducting transformer for current stepupt ferd voelker and robert c. Superpower has developed the capability to produce wire tape from forms of ceramic hts materials that have transition temperatures of around 77k or 320. Design optimization of hightemperature superconducting power. Conceptual design of a 5 mva single phase high temperature. Hts transformer, hysteresis loss, leakage flux, finite element method.
High temperature superconducting demonstrator transformer. Pdf flux transformers made of commercial high critical. The windings of the transformer were made out of bscco superconducting tape. Rsfq, rapid single flux quantum is a highspeed switching device based on switching the magnetic quanta existing within a superconducting loop. There is given the design concept of high temperature superconducting windings of the transformer, made in the form of newly developed firstgeneration high temperature superconducting ribbon wires. High temperature superconducting levitation coil for.
High temperature superconducting partial core transformer and. The switch makes a superconductingtonormal transition within 5ms and also has a rapid recovery to the superconducting state. In addition, one characteristic of superconducting material is that the lower the operating temperature, the greater the amount of current that can flow. F, and thereby are called hightemperature superconductors. Calculation of ac loss for high temperature superconductor.
There is given the design concept of hightemperature superconducting windings of the transformer, made in the form of newly developed firstgeneration hightemperature superconducting. It then examines the stateoftheart in lts transformer development during the last decade and the status of high temperature superconducting hts transformer and conductor development. Hightemperature superconducting cable technology and. History from generators to transformers, transmission and distribution to motors, wire forms the basic building block of the worlds electric power system. Hts high temperature superconductor description specifications support pricing and accessories. The transformer utilizes a unique core design termed partial core. Figure 5 shows the relationship3 between the superconducting cable temperature and critical current from the seitepco verification test. A new 15kva, 230230v high temperature superconducting partial core transformer was designed, built and tested.
Pdf in 2005, the development of a 50hz, 15kva, 30v. A low voltage, mains frequency, partial core, high temperature, superconducting transformer pat bodger wade enright vincent ho department of electrical and computer engineering university of canterbury pb4800, christchurch, new zealand pat. The emphasis is on experiment and recent developments on the high superconducting critical temperature tc cuprates. Comparison of the efficiency of superconducting and. Does ornl part of initiative for superconducting transformer.
Thats a pretty effective way to eliminate core losses. Sykulski, southampton, uk elmeco5, 4 6 september 2005, neleczow, poland university of southampton high temperature superconducting transformers university of southampton professor jan sykulski. This is a bismuth based, multifilamentary, high temperature superconductor. The problem with this approach is that the superconductor would be prone to flux jumping and quenching, and the joints themselves are generators of heat. Utilising high temperature superconductor hts technology in wire applications can allow for the creation of products that dramatically increase power density, quality and reliability. An experimental high temperature superconducting transformer. A superconducting currentlimiting transformer may be an. Market for hightemperature superconducting wire in.
This article describes the development of a directcurrent dc superconducting transformer system for the high current test of superconducting cables. Losses in windings of superconducting traction transformer, 2d and 3d model milan krasl, rostislav vlk, jindrich rybar department of electromechanics and power electronics university of west bohemia universitni 26, 306 14 pilsen czech republic abstract. An innovative transformer concept using ceramic hightemperature superconductors instead of copper as winding material could reduce the transformer losses almost to zero. Development of hightemperature superconducting transformers for. Hts high temperature superconducting hv high voltage ieee institute of electrical and electronics engineers k kelvin.
The cable is a triplystacked multistrand 6 times 6 times 6 type. Superpower has built up the ability to deliver wire tape from types of. The issues with building the superconducting transformer are outlined. Conceptual design of a 5 mva single phase high temperature superconducting transformer. These losses are small compared to losses due to resistive heating in conventional transformer windings. Pdf a study of superconducting transformer with shortcircuit.
Pdf a 15kva hightemperature superconducting partialcore. The project started april 1994 and its goal was to manufacture a real scale superconducting distribution transformer and to operate it during one year in the grid of genevas utility sig. We describe the hightemperature superconducting hts transformer project run by siemens. Dec 28, 20 this paper describes a high temperature superconducting transformer with a bartype magnetic core and concentric windings with alternating layers, with singlechannel and multichannel arrangements. The main transformer accounts for a substantial share of traction losses. Superconducting transformer design and construction. Demountable superconducting coils were originally proposed for the fusion program by the powell group hsieh. High temperature superconducting partial core transformers 2012. The elementary strand has 19,050 nbti filaments of 0. Our unique range of low temperature transformers the only cryogenically proven ultralow noise impedance matching transformers currently available. Market for high temperature superconducting wire in transmission cable applications during the week of april 2327, 1994, donn forbes, a market researcher and business consultant with clients involved in superconductivity, conducted telephone interviews with 23 utility engineers concerning the future prospects for high temperature. The current in the sample is energized by a superconducting transformer circuit, using an inductive method, where the sample conductor is a part of the secondary circuit. The test cable is installed as the secondary winding in a superconducting transformer with iron core in a room temperature space.
This paper presents the modifications necessary in transformer design and optimization to handle hightemperature superconductors as the winding material. Hi h t t s d tihigh temperature superconducting transmission. Pdf a 15kva hightemperature superconducting partial. Experimental superconducting transformer for current stepupt. Superconductors come in two sorts, low temperature lts and high temperature hts. This paper describes a hightemperature superconducting transformer with a bartype magnetic core and concentric windings with alternating layers, with singlechannel and multichannel arrangements. High temperature superconductors, t c above liquid nitrogen boiling point, may also be used to build the superconducting devices in this section. Their application to domestic power supply is also explained as are the reasons why they will become the standard method of power distribution. Acker lahrence radiation laboratory, university ofcalifornia berkeley, california, usa for certain applications one would like to use relatively few turns of a high current conductor to make super conducting magnets.
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