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. Pdf superconducting selfresonant aircore transformer. Due to the tsub c and advantageous current density properties the base of the past was chosen to be of bipbsrcacu system. 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. After that, we have improved the efficiency from 96% to 98%. The secondary coil, which receives energy from the primary winding and delivers it to the load. Ac losses in a toroidal superconducting transformer. Superconducting transformer failure university of canterbury. Structural innovations disclosed include compressed conical shaped winding layers and a resistive matrix to promote rapid switching of current between parallel windings. This wideranging presentation of applied superconductivity, from fundamentals. Quench detection and protection for high temperature. Hts transformer windings design using distributive ratios for. Unlimited viewing of the articlechapter pdf and any associated supplements and figures. The middle and outside windings were connected in series, in effect making it a 230v230v isolating transformer figure 3.
Field modelling and optimisation of a high temperature superconducting synchronous generator with a coreless rotor. This paper briefly summarizes the history of superconducting transformer. Outline superconducting transformers o transformer history o basic transformer design o motivation of superconducting transformers o basics of superconducting transformers o types o electrical circuit o losses and loss evaluation o stateoftheart 10. In this paper, we designed and fabricated four different types of htstft based on double sided ybco thin film and measured their respective operating parameters including. Pdf conventional power transformers are very simple and reliable electrical components and their efficiency, for large power rating, is well above 99. At nominal current the total loss of the lvhvlv assembly is 421 w, corresponding to 0. Superconducting transformers will complement greener smart grid technology. Ptf includes capabilities for sample currents up to 50 ka from a superconducting transformer developed by the university of twente, magnetic fields up to 6. This paper describes the design of a 3 phase high temperature superconducting hts transformer and its characteristics are analyzed. 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. Superconducting transformers will complement greener smart. Cryostat for use with a superconducting transformer abb. It can be designed to step up or step down voltages and works on the magnetic induction principle.
Characteristics of switchable superconducting flux transformer with dc superconducting quantum interference device yoshihiro shimazu and takashi niizeki department of physics, yokohama national university, yokohama 2408501, japan crest, japan science and technology agency, kawaguchi, saitama 3320012, japan. Superconductivity by joe khachan and stephen bosi the discovery of superconductors the phenomenon of superconductivity, in which the electrical resistance of certain materials completely vanishes at low temperatures, is one of the most interesting and sophisticated in condensed matter physics. High temperature superconducting partial core transformer and. The primary coil, which receives energy from the ac source. Comparison of the efficiency of superconducting and. Ac high temperature superconducting hts coils have been developed for transformers, motors and so on. Pdf coordinated control of superconducting fault current limiter and superconducting magnetic energy storage for transient performance enhancement of gridconnected photovoltaic generation system. A superconducting qubit as a quantum transformer routing. Development and application of superconducting transformers. Note the fused cutout and lighting arrestor combination external to the transformer. A conceptual design for a coreless superconducting transformer sct is made, based on the above views and its merits evaluated. A superconducting transformer system for high current cable. The net result is that although a superconducting transformer is likely to save a utility money over a long period of time many transformers see over 30 years of service, the initial cost is much higher than for a traditional resistive transformer.
The latest version of the software can be downloaded for pcs running windows xpvista. A possible solution to reduce magnetic losses in transformer. The difference between the primary and secondary real power can be seen in the time series data downloaded from the meter figure 2. The inside winding was rated for 230v and both the middle and outside windings rated for 115v. Superpower and its partners will design, develop, manufacture, install, and demonstrate a smart grid compatible fault current limiting fcl superconducting transformer on a live grid utility host site. In other words, for a transformer there is no direct electrical connection between the two coil windings, thereby giving it the name also of an isolation transformer. Ybco coated conductors for superconducting transformer windings. Munro, kae nemoto, kouichi semba submitted on 25 aug 2010. Tc superconducting coils that simulated the winding of a high. Both the 100ka superconducting transformer and the t superconducting split coils were installed in a 2m.
As the current source of the conductor samples, the electromagnetic performance of the superconducting transformer determines the stability and safety of the test facility. Background history kammerlingh onnes liquefying of he in 1908. This paste was also applied to make a superconducting planar transformer. Superconductivity basic phenomenon if a material is described as a superconductor, below a certain temperature the critical temperarure it loses its electrical resistivity to become a perfect conductor.
The windings of the traction transformer need to be arranged as closely as possible in a high magnetic field. An experimental high temperature superconducting transformer has been designed and. A novel thin film transformer based on double sided yba 2 cu 3 o 7. Download fulltext pdf superconducting selfresonant aircore transformer conference paper pdf available in pesc record ieee annual power electronics specialists conference 1. In japan we started a national project to develop a 666.
Development of the superconducting transformer is arguably the most difficult of the ac power applications of superconductivity this is because of the need for verylow ac losses, adequate fault and surge performance, and the rigors of the application environment. Abstract having a efficient power system nowadays is of utmost importance. Download coordinated control of superconducting fault current limiter and superconducting magnetic energy storage for transient performance enhancement of gridconnected photovoltaic generation system complete project report. Development of superconducting transformer for railway. The primary dissipates power mainly because of its electrical resistance. Distribution network modelling and analysis of the. Seminar ppt sfcl ppt free download as powerpoint presentation. The two windings of the transformer are called high voltage winding and low voltage winding. The transformer consists of a corefree 10 464 turn primary solenoid which is enclosed by a 6. Detection of interturn faults in transformer winding. Generally, the primary winding of a transformer is connected to the input voltage supply and converts or transforms the electrical power into a. Our antivirus analysis shows that this download is malware free.
Hightemperature 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. Nov 20, 2014 superconductors are the material having almost zero resistivity and behave as diamagnetic below the superconducting transiting temperature superconductivity is the flow of electric current without resistance in certain metals, alloys, and ceramics at temperatures near absolute zero, and in some cases at temperatures hundreds of degrees. Pdf coordinated control of superconducting fault current. Pdf the superconducting transformer of the samsung. Superconducting transformer with a rotating magnetic field. The project started in october 1996 and ended in september. Model around small power transformers, with up to 63 mva and up to. Oct 22, 2007 the primary dissipates power mainly because of its electrical resistance. Pdf ybco coated conductors for superconducting transformer. Pdf a study of superconducting transformer with shortcircuit.
Abstracta partial core superconducting transformer, that was built in the. The superconducting transformer meets the requirements of. Both the devices are based on the superconducting normal state transition in a superconducting switching element magnetically coupled with a primary winding. Early partial core development is discussed followed by some material testing at cryogenic temperatures. These prototypes have used very different geometries, but when the ferromagnetic material is taken out and one wants to maintain a high coupling factor it is necessary to look for a geometry to confine the magnetic. Seminar ppt sfcl ppt transformer superconductivity. High temperature superconducting partial core transformer. The relationships between the design parameters of the devices and. Characteristics of switchable superconducting flux.
An overview of superconducting transformer technology. Experimental superconducting transformer for current stepupt ferd voelker and robert c. The transformer the principle parts of a transformer and their functions are. Dec 04, 2001 a cryostat for a superconducting transformer is provided that includes nonconducting load bearing insulation and is adapted for use with a superconducting transformer. The results of investigations into the physical model of a superconducting transformer with a rotating magnetic field with separate excitation winding are presented. Detection of interturn faults in transformer winding using the capacitor discharge method. Mar 24, 2014 high temp superconducting transformer for railway application.
Properly designed and built superconducting transformer reduces first peak of shortcircuit current. Presentation mode open print download current view. A copper winding transformer model, based on a steinmetz equivalent circuit and a reverse design method, is described. Modern transformers are designed to closer tolerances than transformers in the past. Vlk 3 1katedra elektromechaniky a vykonove elektroniky, zapadoeska univerzita v plzni. In order to make it possible to produce superconducting coils with small overall height, they are made from a plurality of coil subunits, optionally with a plurality of layers for each coil subunit, in particular in the case of the lowvoltage coil of a transformer. Thats a pretty effective way to eliminate core losses. Its objects are reducing the weight and energy consumption. The existing infrastructure of the short sample test facility at fermilab, including a. A superconducting transformer having a winding arrangement that provides for current limitation when subjected to a current transient as well as more efficient utilization of radial spacing and winding insulation.
Design and analysis of a high temperature superconducting. The superconducting transformer consisted of three windings. Calculation principles for a superconducting inductive fcl. The core, which makes a path for the magnetic flux. The invention discloses an automatic liquid supplementation device of a hightemperature superconducting transformer. Seminar on development of hightemperature superconducting transformers for railway applications presented by. A superconducting transformer system for high current cable testing. We demonstrate experimentally the creation and measurement of an entangled state between a microscopic two level system and a macroscopic superconducting resonator where their indirect interaction is mediated by an artificial atom, a superconducting persistent current qubit pcqb. In addition, the cryostat prevents the formation of closed loop stray currents on its outer case. The early development of high temperature superconducting partial core transformers at the university of canterbury is then examined. 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. Development of rebco superconducting power transformers in.
We describe the hightemperature superconducting hts transformer project run by siemens. This article describes the development of a directcurrent dc superconducting transformer system for the high current test of superconducting cables. First, a copper mockup of the superconducting transformer was designed where the mockup would have the same tape and winding dimensions. Pdf ac losses in a toroidal superconducting transformer. A thick film superconductor paste has been developed to study the properties of granulated superconductor materials, to observe the percolation effect and to confirm the theory of the conducting mechanism in the superconducting thick films. Hightemperature superconducting hts transformers for power. A superconducting qubit as a quantum transformer routing entanglement between a microscopic quantum memory and a macroscopic resonator. Influence of the shape in the losses of solenoidal air.
Cn102426464a automatic liquid supplementation device of. Introduction 60kva transformer superconducting secondary winding laminated iron core normalconducting primary winding main transformer parameters power 60 kva ratio 100 60 turns voltage 1 kv 600 v currents 60 a 100 a j prim 5 a mm2 j sec 83. Superconducting transformer design and construction core. Hightemperature superconducting hts transformers have a promising feature in reduction of total weight, total size, and the losses of. Status of superconducting power transformer development. The introduction of sc machines into the power system needs to display the merits of not only efficiency improvement, but also power system performance and operation.
This document describes the 630 kva hts transformer project made by abb jointly with edf and asc. Development of hightemperature superconducting transformers for. First, a copper mockup of the superconducting transformer was designed where the mockup would have the same tape and winding dimensions as the superconducting transformer, which means the same core can be used for two different sets of windings. The energy and environmental benefits of superconducting power. This paper presents a new experimental full core hts transformer with an alternative winding design to enable greater cooling for the. The most popular versions among the software users are 3. Projects on transformer, distribution transformer, electrical transformer, current transformers, distribution transformers repairs, transformer oil, voltage. The issues with building the superconducting transformer are outlined. To meet the need in the applied superconductivity community of a cable test facility at high magnetic fields, a superconducting current transformer that was designed to deliver about 40 ka of dc current in rutherford cables was designed and fabricated for operation in a 14 t16 t solenoid with 77 mm bore. 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. A superconducting transformer coil 2 is arranged inside a liquid nitrogen dewar 1 of the superconducting transformer. The critical component of the test facility is an 80 ka superconducting transformer which consists of a multiturn primary coil and a minorturn secondary coil.
Pdf an experimental high temperature superconducting. A superconducting transformer system for high current. This paper highlights the developments of the high temperature superconducting htsting power transmission and. 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. Noe, eucas short course, superconducting transformers kitzentrum energie year organization country power in kva data voltage per winding supercond. A transformer is an electrical apparatus designed to convert alternating current from one voltage to another. Ac loss of the individual transformer coils and of a full lvhvlv assembly at 77 k. This paper gives an overview of progress of the development of. Electrical energy is a major source of the entire process of evolution and modern lifestyle. The 28 mva threephase fcl mediumpower utility transformer 69 kv12.
As ac loss and critical current of hts tapes are dependent on. Experimental superconducting transformer for current stepupt. A transformer has no moving parts and is a completely. Read characteristics analysis of superconducting power transformer without iron core, electrical engineering in japan on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Traction transformer 1 mva, superconducting, oilimmersed and medium frequency 191 traction transformer 1mva, superconducting, oilimmersed and medium frequency m. A new design of a 15kva single phase full core superconducting transformer, operating in liquid nitrogen, is presented. In high temperature superconducting transformers hts transformers, normally cooled by liquid nitrogen at 77 k, cores are usually kept at room temperature in. Applied superconductivity ebook, pdf portofrei bei. Calculated hts transformer size, weight, efficiency, and cost are compared with a conventional transformer of similar. High temperature superconducting partial core transformers.
The current installer available for download occupies 288. A method of estimating the total ac loss in a hightemperature superconducting transformer winding. Transformer construction a transformer consists of two windings coupled through a magnetic medium. Superconducting transformer design and construction. Author links open overlay panel wenjuan song a b c zhenan jiang b mike staines b rodney a. We have developed 4mva class superconducting transformer in 2004. Pdf a lowvoltage, mains frequency, partial core, high. The final design of the high temperature superconducting partial core transformer and fault current limiter is then presented. The rated current of the transformer was 65a on all the windings. We have been developing superconducting transformer for high speed train. Electromagnetic analysis of a superconducting transformer for.
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