Effect of hightemperature superconducting power technologies. 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. 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. This is a bismuth based, multifilamentary, high temperature superconductor. The emphasis is on experiment and recent developments on the high superconducting critical temperature tc cuprates. High temperature superconducting partial core transformers. The superconducting transformer of the samsung superconductor test facility sstf article pdf available in ieee transactions on applied superconductivity 111. There is a strong similarity between these nanoscale polarons observed in the cmr materials, the polar nanoregions that cause the dramatic piezoelectric response of relaxor ferroelectrics, and the formation of stripes in the high temperature superconducting cuprates. Reducing ac losses in hightemperature superconducting coated. The transformer was designed purely as a proof of concept, rather than as a unit that would be put into service.
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. We describe the hightemperature superconducting hts transformer project run by siemens. Electrical power engineering, school of electronics and computer science. If a 40 mva transformer with a high temperature superconducting winding is considered, short. An innovative transformer concept using ceramic high temperature superconductors instead of copper as winding material could reduce the transformer losses almost to zero. There is given the design concept of hightemperature superconducting windings of the transformer, made in the form of newly developed firstgeneration hightemperature superconducting. Secondgeneration hightemperature superconductor wires for the. Conceptual design of a 5 mva single phase high temperature. The discovery of revolutionary high temperature superconducting hts compounds in 1986 led to the development of a radically new type of wire for the power industrythe most fundamental advance in wire technology in more than a century. Part 1 transformer modelling, submitted to ieee transactions on power delivery on 260112.
Hts high temperature superconducting hv high voltage ieee institute of electrical and electronics engineers k. Hts superconducting coils for applications in electrical engineering 279 in the case of double pancake coil fig. A high frequency superconducting aircore transformer the proposed power transformer is constructed by using superconductor wound on an air core, the primary and secondary windings as shown in figure 5 are spiral in shape, and they are made in bifilar way and interleaved each other. S09532048047753 a single phase model 9 kva high temperature superconducting power transformer yinshun wang1,2, huidong li1,xiangzhao3, junjie han3, liye xiao1, liangzhen lin1,yingguan1,qingbao1, zhiqin zhu1, guanghui lu3,xixu 1,zikaiwang, shaotao dai1 and dong hui1.
The selected commercial conductor american superconductor corp. Hts transformer, hysteresis loss, leakage flux, finite element method. Power cables, currentlimiting devices, rotating machinery, transformers, and superconductor magnetic energy storage smes systems are discussed in turn. Sykulski, southampton, uk elmeco5, 4 6 september 2005, neleczow, poland university of southampton applications of hts high temperature superconductivity conductivity 106 better than copper current density 10 times larger than in copper windings cheap technology often compared to water cooling great potential in electric power applications. Superconducting transformers for study of highcurrent. A superconducting currentlimiting transformer may be an. High temperature superconductors hts and can accomplish their basic temperature 77k utilizing economical fluid nitrogen, as opposed to the more costly fluid helium required by the first, low temperature superconductors lts which are ordinarily utilized as a part of the superconducting. Htsc superconduction the lossfree electric conduction properties of some materials at. The final design of the high temperature superconducting partial core transformer and fault current limiter is then presented. Simplify simulation of transformer winding temperatures.
Pdf a study of superconducting transformer with shortcircuit. High temperature superconducting hts coated conductors in utility power transformers must satisfy a set of operating requirements that are driven by two major considerationshts transformers must be economically competitive with conventional units, and the conductor must be robust enough to be used in a commercial manufacturing environment. 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. 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. A hightemperature superconducting transformer with localized. Sectional view of the transformer one half weight of magnetic parts weight of windings hv m hv 71 kg weight of windings lv.
The classic tradeoff between fault control, bus capacity, and system. Development of a new superconducting main transformer for trains. Technology policy institute for the department of energy under contract eng. 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. This report evaluates the potential of hightemperature superconducting hts. Our unique range of low temperature transformers the only cryogenically proven ultralow noise impedance matching transformers currently available. Design optimization of hightemperature superconducting. The issues with building the superconducting transformer are outlined. 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. Conceptual design of a 5 mva single phase high temperature superconducting transformer.
Since the discovery of hightemperature superconductivity, over 30 years ago. Quench monitoring system is needed for their safety operations. First, a copper mockup of the superconducting transformer was designed where the mockup would have the same tape and winding dimensions. Superconducting transformer was modeled 1mva transformer, fig. One valve is a full ln2 rated manual vent to be used. This paper describes a hightemperature superconducting transformer with a bartype magnetic core and concentric windings with alternating layers, with singlechannel and multichannel arrangements. Pdf the superconducting transformer of the samsung.
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. High temperature superconducting demonstrator transformer. Experimental superconducting transformer for current stepupt. 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 incomplete center was a slug of covered silicon steel. Htsc superconduction the lossfree electric conduction properties of some materials at very low temperatures was discovered in 1911. Quench detection and protection for high temperature. Design results are presented for a fivelegged core, threephase, 3. Another alternative is use of a single, large, high impedance transformer, resulting in degraded voltage regcustomers on the bus. For example, sei has confirmed that the current leads and magnets it had manufactured maintain good stability for several years table 2. High temperature superconducting transmission cables. Development of a new superconducting main transformer for. Therefore, the fermi surface of htsc is very close to the fermi surface of the doped cuo 2 plane or multiplanes, in case of multilayer cuprates and can be presented on the 2d reciprocal space or momentum space of the cuo 2 lattice.
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. Hts high temperature superconducting acronymfinder. In this paper, we fabricated two transformertype sfcls using different hightemperature superconducting wires bi2223 bscco wire and gdbco, which. We shall first discuss theparametersthatinfluence the design of such a superconducting transformer. Ac high temperature superconducting hts transformers and motors have been developed as compact and low loss electrical apparatus.
Sykulski, southampton, uk elmeco5, 4 6 september 2005, neleczow, poland university of southampton high temperature superconducting transformers university. In this paper, we fabricated two transformer type sfcls using different high temperature superconducting wires bi2223 bscco wire and gdbco, which is a kind of rareearthbariumcopperoxide. Low and medium frequency ranges for ac resistitivity and ac susceptibility, high frequency variants for use in superconducting bolometer matching applications. Open circuit, short circuit and loaded tests were performed on the hts transformer while submerged in liquid nitrogen. High temperature superconducting how is high temperature. Abstractas hts transformers begin to move into utility and commercial applications. All superconducting materials known at ordinary pressures currently work far below ambient. This setup can reduce potentially occurring short circuits to less than 50% of the prospective values within a few milliseconds. High temperature superconducting how is high temperature superconducting abbreviated.
The project started in october 1996 and ended in september 2001. Since the discovery of high temperature superconductors htsc in 1986 by k. Thats a pretty effective way to eliminate core losses. Hightemperature superconducting cable technology and. The windings were layer twisted with bi2223 hts wire. High temperature superconducting cable for power transmission.
The transformer was a full core, 50hz, 15kva, 230v. Esas summer school on high temperature superconductor technology for sustainable energy and transport systems, june 8th14th 2016, bologna 2 mathias noe, institute of technical physics outline superconducting transformers o transformer history o basic transformer design o motivation of superconducting transformers o basics of superconducting. Bednorz, a new interest for power application studies appeared. Institute of physics publishing superconductor science and technology supercond. In 2004, cryomagnetics completed and successfully tested a 3. From this circuit we find the ratio of secondary current to. Psfcja1045 status of high temperature superconducting magnet development l. Calculation of ac loss for high temperature superconductor. Abstract the chapter provides an overview of power applications of high temperature superconductivity hts with emphasis on superconducting transformers. The windings of the transformer were made out of bscco superconducting tape. A lowvoltage, mains frequency, partial core, high temperature, superconducting transformer article pdf available january 2005 with 358 reads how we measure reads. High temperature superconducting partial core transformer.
Following successful testing of the copper mock up transformer, a set of hts windings were constructed using bi2223 superconductors. 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. Oct 22, 2007 the primary dissipates power mainly because of its electrical resistance. Pdf a 15kva hightemperature superconducting partial. Status of high temperature superconducting magnet development. This document describes the 630 kva hts transformer project made by abb jointly with edf and asc. The electronic structure of superconducting cuprates is highly anisotropic see the crystal structure of ybco or bscco. Superconducting transformer design and construction. A new 15kva, 230230 v, high temperature superconducting, partialcore transformer has been designed, built, and tested.
High temperature superconducting levitation coil for. Hts high temperature superconducting hv high voltage ieee institute of electrical and electronics engineers k kelvin kva kilovoltampere kw kilowatt kwhr kilowatthour lts low temperature superconducting lv low voltage meps minimum energy producing standards ohl over head line p power. A new design of a 15kva single phase full core superconducting transformer, operating in liquid nitrogen, is presented. Design optimization of hightemperature superconducting power. The most usual system is the balance voltage method and it uses a voltage tap connected directly on the middle of superconducting coil.
Superconducting transformer design and construction core. Their application to domestic power supply is also explained as are the reasons why they will become the standard method of power distribution. These changes include ac losses, shortcircuit stresses, and cooling loads. The aim of the project was to show the future prospects for superconducting railway transformers. This ring position is stable to tilt and horizontal displacements, thus reducing the control power requirements for. 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. A bismuthbased superconducting tape wire was used for each of the windings of the testmanufactured main transformer. An experimental high temperature superconducting transformer.
Seminar on development of hightemperature superconducting transformers for railway applications presented by. Hts high temperature superconductor cryomagnetics, inc. Article pdf available in international journal of electrical and computer engineering. Demountable superconducting coils were originally proposed for the fusion program by the powell group hsieh. Pdf a lowvoltage, mains frequency, partial core, high temperature. If a 40 mva transformer with a high temperature superconducting winding is considered. The primary dissipates power mainly because of its electrical resistance.
For lengths over 200 m, the untwisted filaments have an engineering critical current of 4500 acm 2 at self field 77k, and specific average losses of 3 mwa during the transformer operation at rated current. 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. An innovative transformer concept using ceramic hightemperature superconductors instead of copper as winding material could reduce the transformer losses almost to zero. A hightemperature superconducting transformer with. Sutanto the hong kong polytechnic university, hung hum, hong kong. Pdf a high temperature superconducting transformer htst has been built. When the operating temperature was lowered from 77 k to 70 k, there was an approximately 30% increase in the currentcarrying capacity. 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. Pdf the paper presents physicomathematical models for analyzing transient. Mar 24, 2014 we describe the high temperature superconducting hts transformer project run by siemens. Electrical measurements cryogenic transformers cmrdirect. Pdf a lowvoltage, mains frequency, partial core, high.
Since 1911, plenty of superconducting materials have been discovered. University of southampton, southampton so17 1bj, uk. Comparison of the efficiency of superconducting and. They proposed low temperature tapelike superconductors thick films. The purpose of the development was to reduce the size and weight of main transformers and improve their efficiency. Market for hightemperature superconducting wire in. 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. 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.
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