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. Full text of high temperature superconductivity see other formats. First, a copper mockup of the superconducting transformer was designed where the mockup would have the same tape and winding dimensions. Abstract superconducting power system apparatus is of considerable interest to the electrical power delivery. The aim of the project was to build up knowhow about transformers with superconducting windings. A low voltage, mains frequency, partial core, high. High temperature superconductors, gen1 biscco and gen2 ybco superconductors, and their architecturealong with a discussion of the factors affecting their performancewill be presented. Pdf a study of superconducting transformer with shortcircuit. Pdf the paper presents physicomathematical models for. Calculation of ac loss for high temperature superconductor. Design optimization of hightemperature superconducting. Power cables, currentlimiting devices, rotating machinery, transformers, and superconductor.
Bednorz, a new interest for power application studies appeared. Study on the reduction of current for a high field. High temperature superconducting how is high temperature superconducting abbreviated. 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 generators, motors, fault current limiters, transformers, flywheels, cables. The primary dissipates power mainly because of its electrical resistance. This paper describes the design of a 3 phase high temperature superconducting hts transformer and its characteristics are analyzed. Psfcja1045 status of high temperature superconducting magnet development l. Case in point, the discovery of hightemperature superconductivity hts in 1986drastically improved the potential for economic operation of many superconducting devices. Secondgeneration hightemperature superconductor wires for the.
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. Effect of hightemperature superconducting power technologies. 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 partial core transformer. The paper deals with a superconducting traction transformer. A fault current limiting superconducting transformer all of this makes the idea of a hts, fcl transformer particularly interesting. An innovative transformer concept using ceramic hightemperature superconductors instead of copper as winding material could reduce the transformer losses almost to zero. This article describes the development of a directcurrent dc superconducting transformer system for the high current test of superconducting cables. The main transformer accounts for a substantial share of traction losses. The same device would serve as transformer and fcl in the substation. Index terms hightemperature superconductors, optimization methods, power transformers. 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 conventional transformer.
Available cryogenic cooling options are also discussed for cooling hts coils. As ac loss and critical current of hts tapes are dependent on. In other words, the ratio between the short circuit current and the load current should be a. Us7301425b2 pancake type bifilar winding module using. All superconducting materials known at ordinary pressures currently work far below ambient. 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. Comparison of the efficiency of superconducting and. There is given the design concept of hightemperature superconducting windings of the transformer, made in the form of newly developed firstgeneration hightemperature superconducting. The application of high temperature superconductors to space. Fault current limiting high temperature superconducting. A new 15kva, 230230v high temperature superconducting partial core transformer. Thats a pretty effective way to eliminate core losses.
Application for winding temperature simulation where the point of measurement the well or pocket is not easily viewed from the base of the apparatus or the information is required remotely. 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. Study on the reduction of current for a high field superconducting magnet by using a superconducting transformer k. Superconducting transformers cut the volume, weight, and losses of conventional. An experimental high temperature superconducting transformer. Abstract in 2005, the development of a 50hz, 15kva, 230v. The hts transformers are discussed in this article.
High temperature superconducting partial core transformers. Traction transformer 1 mva, superconducting, oilimmersed and medium frequency 191 traction transformer 1mva, superconducting, oilimmersed and medium frequency m. 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. Early partial core development is discussed followed by some material testing at cryogenic temperatures. The discovery of the cupratebased high temperature superconductors hts 1 opened up a major. An ac loss model for high temperature superconductors is also presented. For transformers, superconductors with a much lower ac loss are necessary. A varying current in any one coil of the transformer produces a varying magnetic flux in the transformers core, which induces a varying electromotive force across any other coils wound around the same core. Low and medium frequency ranges for ac resistitivity and ac susceptibility, high frequency variants for use in superconducting bolometer matching applications. If such a transformer, having the benefits of reduced losses also provided fcl capability, it could overcome the real estate problem. A transformer is a passive electrical device that transfers electrical energy from one electrical circuit to another, or multiple circuits. The calculations of the loaddependent efficiency for both transformers are performed referring to a real case application of a power transformer in a power plant.
Losses in windings of superconducting traction transformer. Pdf hightemperature superconducting hts transformer. Introduction the development of hightemperature superconducting power apparatus has made remarkable progress during the last several years. A feasible hts transformer design has been derived using a program developed from traditional transformer design. Fault current limiting high temperature superconducting transformers technical presentation thursday, october 25, 2012 by russell neal, sam mehta and others 1. It could be transformed into roebel cables for carrying larger currents.
This document describes the 630 kva hts transformer project made by abb jointly with edf and asc. In 2004, cryomagnetics completed and successfully tested a 3. The issues with building the superconducting transformer are outlined. 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. A hightemperature superconducting transformer with. A new design of a 15kva single phase full core superconducting transformer, operating in liquid nitrogen, is presented. In other words, the vortex glass does not follow ohms law. This chapter describes superconductivity, the materials and some devices that can be formed and notes some of the applications for their use making them interesting materials. Ac losses in a high temperature superconducting generator. The recent discovery of a class of high temperature superconducting hts ceramics which. Akm 468904681248003 winding temperature simulation systems accurate measurement of transformer winding temperature. The transformer consists of a corefree 10 464 turn primary solenoid which is enclosed by a 6. The htsc transformer with a separate winding for excitation of the mutual magnetic flux is considered.
A superconducting transformer system for high current. The peculiar properties of hightemperature superconductors include anisotropy, flux creep and. 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. The early development of high temperature superconducting partial core transformers at the university of canterbury is then examined. High temperature superconducting demonstrator transformer.
Transformer design the design of the transformer has involved computer modelling and empirical experimentation activities. Poynting vector in hightemperature superconducting. Design and application of a highfrequency highvoltage generator matthias birle, carsten leu and stefan bauer ilmenau university of technology, centre for electrical power engineering, research group of high voltage technology, germany. This paper describes a hightemperature superconducting transformer with a bartype magnetic core and concentric windings with alternating layers, with singlechannel and multichannel arrangements. Ac losses in a high temperature superconducting generator article pdf available in ieee transactions on applied superconductivity 152. Ac loss in superconducting tapes and cables university of twente. Our unique range of low temperature transformers the only cryogenically proven ultralow noise impedance matching transformers currently available. Since the discovery of high temperature superconductors htsc in 1986 by k. The reverse design model is discussed followed by the model parameters that are used in designing the high temperature superconducting partial core transformer. The project started in october 1996 and ended in september 2001. The respective explanation of superconductivity by the bcs theory in 1957 5 was a desperately awaited breakthrough of theoretical solid state physics. The words parallel and perpendicular in the study refer to the. High temperature superconducting how is high temperature.
The many benefits of hts transformers and fault current limiting hts transformers will be discussed. We describe the hightemperature superconducting hts transformer project run by siemens. The article presents the design and the electrical circuit of the transformer, the equations of electromagnetic balance, and the total resistance of the primary and secondary power windings and. Conceptual design of a 5 mva single phase high temperature superconducting transformer. May the hightemperature oven for axial mounting on ecr2 described in the last progress report has been tested, producing beams of both titanium and aluminum. If a 40 mva transformer with a high temperature superconducting. A fault current limiting superconducting transformer. Iv 79 axiallymounted, hightemperature oven for ecr2. High temperature superconducting hv high voltage ieee institute of electrical and electronics engineers. Accurate measurement of transformer winding temperature. Conceptual design of a 5 mva single phase high temperature. The high temperature superconducting partial core transformer and fault current limiter was found to be 99.
Electrical measurements cryogenic transformers cmrdirect. Superconducting transformer design and construction. The transformer was designed purely as a proof of concept, rather than as a unit that would be put into. The aim of the project was to show the future prospects for superconducting railway transformers. The discussion provides rationale for selecting hts over lts. 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.
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