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. University of southampton, southampton so17 1bj, uk. High temperature superconducting hts materials have the potential to generate a magnetic field beyond the level obtainable with low temperature superconducting lts materials. In case that ac loss is so large, the size and weight of. Ppt superconducting materials powerpoint presentation. Superconducting generators superconductivity electric. Modelling of transformers with internal incipient faults posted by. However, superconducting transformers not only eliminate the electrical resistance in the wires but also allow the construction of useful transformers without a core.
M ali beefa29 m tahir shaheen beefa38 anum hassan beefa45 ahmer sameer beefa74 2. The transformer is immersed in oil which acts as an insulator as well as a coolant. The latest version of the software can be downloaded for pcs running windows xpvista. As for transformers, the development target is a 666. Distribution network modelling and analysis of the. A free powerpoint ppt presentation displayed as a flash slide show on id. To reduce losses, the cryostat was to be made of a nonconducting fiberglass reinforced plastic frp. Development and application of superconducting transformers. Comparison of the efficiency of superconducting and. 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.
The efficiency is raised to over 99%, whereas the weight and volume can be reduced by approximately 45% 4. The core, which makes a path for the magnetic flux. Electrical power engineering, school of electronics and computer science. Other applications not discussed here include magnetohydrodynamic power generation, transformers, motors, and power conditioning electronics. Seminar on surge current protection using superconductor is the property of its rightful owner. Superconductors for power transmission and distribution is the property of its rightful owner. Objectives introduction requirement of fcl properties of sfcl operating principle of fcl desired characteristic of an ideal fcl types of fcl applications of fcl conclusions. Our antivirus analysis shows that this download is malware free. No energy loss due to heat transformers can be made smaller and last longer. The issues with building the superconducting transformer are outlined. Superconducting generators free download as powerpoint presentation.
Apr 11, 2015 presentation about transformer and its types 1. The advantages of stationary hts transformers compared to transformers 1. Contemporary technology permits for the construction of superconducting transformers with windings made of hightc superconductor coated tapes 2g hts tapes. Oct 22, 2007 however, superconducting transformers not only eliminate the electrical resistance in the wires but also allow the construction of useful transformers without a core. Primary benefit the primary benefit in a superconducting transformer is the fault current limiting capability. In power distribution system, high voltage and high intensity of current always present. An overview of the impact of superconductivity on these applications is provided in table 31. Transformer is not an energy conversion device, but it is device that changes ac electrical power at one voltage level into ac electrical power at another voltage level through the action of magnetic field but with a. Superconductivity is the set of physical properties observed in certain materials, wherein electrical resistance vanishes and from which magnetic flux fields are expelled. Hence it is designed such that copper losses are minimal. The most popular versions among the software users are 3. The goal of this energy department project is to fund cuttingedge research on difficult but important engineering problems. Scribd is the worlds largest social reading and publishing site.
Similarly, current transformers take a high current and reduce it to typically 5 amps on the secondary winding so that it. Voltage transformers are most commonly used to lower the high line voltages down to typically 120 volts on the secondary to be connected to a voltmeter, watthour meter, or protection relay. Pdf a resonant transformer for high voltage testing of. Atomic physics with a superconducting artificial atom posted by. The object of the study is a superconducting film magnetic flux transformer comprising two square shaped loops with the tapering active strips and a magnetosensitive film element between them.
A fault current limiter fcl, or fault current controller fcc, is a device which limits the prospective fault current when a fault occurs e. Abstract the chapter provides an overview of power applications of high temperature superconductivity hts with emphasis on superconducting transformers. Atomic physics with a superconducting artificial atom page link. The ac loss induced in the windings due to the perpendicular component of applied magnetic field is the most part of the total heat load of superconducting transformers, which determines the required cooling capacity of the cryocooler. Power transformer power transformers are used in transmission network of higher voltages for stepup and step down application 400 kv, 200 kv, 110 kv, 66 kv, 33kv and are generally rated above 200mva.
Unlike an ordinary metallic conductor, whose resistance decreases gradually as its temperature is lowered even down to near absolute zero, a superconductor has a. Superconducting transformer design and construction. Conductor losses in superconducting transformers sciencedirect. Superconducting materials superconductivity magnetism. Transformers ppt transformer power physics free 30. It is shown that splitting of the active strips into parallel micro and nanosized superconducting branches and slits increases the gain factor of the transformer, i. A new design of a 15kva single phase full core superconducting transformer, op erating in liquid. The term includes superconducting, solidstate and inductive devices. Powerpoint slide on superconductors compiled by sowjanya kandadai.
Pdf a lowvoltage, mains frequency, partial core, high temperature. Superconducting materials free download as powerpoint presentation. Download as ppt, pdf, txt or read online from scribd. Because the iron or steel core is an electrical conductor as well as a magnetic circuit, the changing current in the primary will tend to set. The word transformer comes form the word transform. Any material exhibiting these properties is a superconductor. The transformer the principle parts of a transformer and their functions are. First, a copper mockup of the superconducting transformer was designed where the mockup would have the same tape and winding dimensions. Improving the prediction of the winding losses is of central importance for the development of superconducting transformers. Superconductors superconductivity is phenomenon in certain materials at extremely low temperatures, characterized by exactly zero electrical resistance and exclusion of the interior magnetic field i.
This paper presents a new experimental full core hts transformer with an. 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. Additionally, a 20 minute oral presentation titled superconducting transformer failure. Oral presentation at the engineering lunchtime seminar. The current transfa problem was not solved at transformer development m of 1 transformer and the be the the to a. Fault current limiter is used to limit this current, it must possess. A resonant transformer for high voltage testing of generator stators. Manufacture of electrical generators and transformers 1. Ybco coated conductors for superconducting transformer. Theoretically, the complete highvoltage grid could be changed into a superconducting low to mediumvoltage grid, making highvoltage up and down transformers unnecessary with a direct power plant to city connection at the turbine output voltage 1030 kv. The main benefits of hts transformers are reduced size, weight, energy. Temperature rise for various stabilizer free silver overlayer thicknesses. Applications of high temperature superconductors to electric. Ppt superconductivity uk powerpoint presentation free.
Superconductivity is the set of physical properties observed in certain materials, wherein. Due to the presence of both ac magnetic fields and ac transport currents the description of the ac loss is a complex task and no complete theory for tape shaped superconductors is known up to now. Oct, 2015 power transformer power transformers are used in transmission network of higher voltages for stepup and step down application 400 kv, 200 kv, 110 kv, 66 kv, 33kv and are generally rated above 200mva. Ppt superconductivity uk powerpoint presentation free to. Ybco coated conductors for superconducting transformer windings. The secondary coil, which receives energy from the primary winding and delivers it to the load. The short ckt current can exceed by a factor of 100 of the nominal current. Measuring instruments, such as ammeters, voltmeters, kilowatthour meters, etc, whether electromechanical or electronic, meet insuperable design problems if faced with the high voltages or high currents. Hightc dc squids fabricated from thin films of yba2cu3o7x ybco have achieved noise energies below 10.
In japan we started a national project to develop superconducting cables, transformers and smes by using rebco tapes in 2006. Superconducting film magnetic flux transformer with micro. The objective of this paper is to outline the advantages of superconducting transmission lines with respect to public and social acceptance, and to show the status of existing and planned superconducting transmission lines, highlighting the positive sustainability characteristics of this technological option. The only onestop reference to design, analysis, and manufacturing concepts for power devices utilizing hts high temperature superconductors hts have been used for building many devices for electric grids worldwide and for large ship propulsion motors for the u. Oil is tested for resistivity, dielectric and acidic characteristics. Current distribution in parallel tapes of superconducting. A concept for a high voltage bushing was presented but the concept was not developed.
Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. A free powerpoint ppt presentation displayed as a flash slide show on. Transformers ppt free download as powerpoint presentation. The primary coil, which receives energy from the ac source. Function of transformer oil muskaan transformers are designed for a maximum temp. Seminar ppt sfcl ppt transformer superconductivity. The superconducting state is defined by three very important factors. Mar 24, 2014 the advantages of stationary hts transformers compared to transformers 1. Development of rebco superconducting power transformers in.
An experimental high temperature superconducting transformer. The development of high temperature superconducting hts power transformers has made remarkable progress in recent years. Applications of high temperature superconductors to. The path forward from industrial development to an utility. Applications of superconductivity princeton university. The current installer available for download occupies 288. A new design of a 15kva single phase full core superconducting transformer, operating in liquid nitrogen, is presented. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. The core will generate heat as the magnetic domains are constantly flipped in the alternating field of the windings of the transformer, and this is the biggest energy loss in most. The paper presents the current state of research on superconducting transformers for the electrical power system, used for limiting the shortcircuit current. Superconducting transmission lines sustainable electric. Ppt superconductors for power transmission and distribution. If so, share your ppt presentation slides online with. Does ornl part of initiative for superconducting transformer.
Winner of the standing ovation award for best powerpoint templates from presentations magazine. Both 630kva, threephase and 1mva single phase demonstration units are expected to operate in. This is because the gibbs free energy of the superconducting phase. Presentation of the failure details will be of use to other researchers who are building hts transformers.
Losses in superconducting windings the main loss mechanism in useful superconductors appears to be hysteretic. Pdf a high temperature superconducting transformer htst has been built. Power transmission and distribution a free powerpoint ppt presentation displayed. Superconducting transformer design and construction core. Produce mechanical and thermal stress proportional to square of the current. Unlike an ordinary metallic conductor, whose resistance decreases gradually as its temperature is lowered even. High temperature superconducting partial core transformers. Transformers o types o electrical circuit o losses and loss evaluation o stateoftheart. To study the various types of fault current limiters for power system protection and its applications sfcl is a new power device to automatically limit a fault current. It is mostly designed for superconducting application 12. Each of these parameters is very dependant on the other two properties present critical temperature t the highest temperature at which superconductivity occurs in a material. Thank you guys for your support and encouragement for. Other digital versions may also be available to download e.605 590 340 1361 1434 495 1417 803 1420 1025 661 921 553 1329 1204 174 762 1101 1422 1242 1482 854 126 123 1314 1198 1109 587 708 270 947 1394 1161 883