Then the types of magnetooptical effects are described, which include the varieties of the interactions of electromagnetic waves with magnetization or spins in solids. The primary is connected to the source and carries the current that establishes a magnetic field. Find data sheet, current ransformers, rectangular transformers, splitcore, transformers, primary wound transformers, ct selection chart. Performance of current transformers with geomagnetically induced currents bogdan kasztenny, normann fischer, douglas taylor, tejasvi prakash, and jeevan jalli schweitzer engineering laboratories, inc. The core can be made from various materials, this post discusses some of them. To suppress the effect of the linear birefringence in optical fiber sensor on measurement. The magnitude and wave shape of the resulting magnetizing current pulse are given for of an example large power transformer when. A current measurement technique using the magneto optic or faraday effect, has been developed, tested, and demonstrated. Find data sheet, current ransformers, rectangular transformers, splitcore, transformers, primary wound transformers, ct selection chart, 1507 beaumont st. Download the seminar report for magneto optic current. A comparison of current sense schemes listing advantages and disadvantages of each type. This is the current required to produce the flux in ferromagnetic core.
No and for you to ask this makes me suspect you are not really an electrical engineer as your profile states. The main challenge with conventional current transformers in highvoltage. Dixon this topic reveals, by means of magnetic field plots, many of the problems that occur in magnetic device structures, utilizing both conventional cores and planar cores. Performance of magnetooptical glass in optical current. This phenomen result in a unwanted influences on power transformers and the power system. With increasing drawbacks of conventional current transformers such as saturation of magnetic field under high current, electromagnetic interference and complicated insulation and cooling structures are driving the demand for advanced electrical equipment, for instance, magneto optic current transformer market over the forecast. Magnetooptical current transformer technology moct. Nov 17, 2015 the magnetizing current in a real transformer when the ac power source is connected to a transformer, a current flows in the primary winding, even when the secondary winding is opencircuited.
The optical current transformer basically consists of. The main challenge with conventional current transformers in. Magnetooptical current transformer technology moct seminar. Pdf demagnetization of current transformers using pwm burden. Basis for moctinteraction between the magnetic field of the primary conductor and the optical activity of glass material magneto optical current transformer is an instrument transformer,using.
Study on magnetooptic balance type of optical fiber. It also describes a special protective relay reacting on dc component in the transformer neutral current. Tecgnology a new trend is being introduced, which known as ocp based on adaptive theory, which make use of accuracy in the steady state of the conventional current transformer and the moct with no saturation under fault current transients. A wide variety of optical current transformer options are available to you, such as usage, phase. For power frequency, 25 hz to 400 hz service, the current transformer, called a donut transformer, or ct in the trade, is commonly employed. Magneto optic current transformer market global industry. It uses the rotation of the plane of polarization by a magnetic field exhibited in certain glasses faraday effect. The currentcarrying conductor is passed through the hole in a toroid of magnetic material. A wide variety of optical current transformer options are available to. Magneto optic current transformer full seminar reports, pdf seminar abstract, ppt, presentation, project idea, latest technology details, ask latest information. Bharati vidyapeeths college of engineering presented by shashank singhal 2. The transformer model used for this experiment is the equivalent circuit from the transformer model experiment, except we are using only one 120v primary winding and.
These current sense transformers are fully encapsulated allowing for a high isolation of 4000 vac between primary and secondary windings. The permeability of iron can be many hundreds, so having a magnetic circuit path of iron rather than air greatly increases the flux, which is why iron is a common choice of material for inductor and transformer cores. Magnetic cores are used in transformers, which serve as the pathway of the flux. Simple transformer a transformer in its simplest form is shown in figure 19. The magnetooptic current transformer moct is a passive optical current transducer which uses light to accurately measure current on high voltage systems. First, a theoretical analysis was performed on the effect of temperature on the performance of the sensing element of paramagnetic rare earthdoped magnetooptical glass material that can be used in an optical current transducer application. Maybe a first year electrical engineering student would ask this question, but not someone with any kind of ee degree. Effects of geomagnetically induced currents on power transformers and power systems r. Global magneto optic current transformer market analysis. First, the phenomenon of part cycle, semi saturation of transformer cores due to gic is described briefly. To measure currents power stations and substations. Abstractthis paper zes the perfanaly ormance of current transformers cts under the presence of geomagnetically. Magneto optic current transformer, ask latest information, magneto optic current transformer abstract, magneto optic current transformer report, magneto optic current transformer presentation pdf,doc,ppt, magneto optic current transformer technology discussion, magneto optic current transformer paper presentation details, magneto optic current transformer, ppt, pdf, report, presentation, source. The difference is that the rogowski coil is an air core design as opposed to the current transformer that relies upon a highpermeability core, such as a laminated steel, to magnetically couple to a secondary winding.
Magneto optic current transformer technology moct attish jain btech, eee, srm university kancheepuram kattankulathur 603203 abstract. Fiberoptic current and voltage sensors for highvoltage. Magnetooptic current transformer polarization waves transformer. Fiber optic current sensors and optical current transformers version. Magneto optic current transformer technology moct analyzer is that photo detectors can only detect the intensity of light, rather than the orientation of polarizations. An accurate electric current transducer is a key component of any power system instrumentation. To download the current transformer design tool, enter and submit your contact information below. Moct block diagram applications pros and cons conclusion 3. When originally published in the early 1940s, this series was hailed in the new york times because it emphasizes method of thought, and not mere acquisition of facts.
Reports the latest research and development work of magnetooptical ac current transformer operating with faradays effect, intended for voltage systemsover. Current measurement with optical current transformer. Magneto optic current transformer, ask latest information, magneto optic current transformer abstract,magneto optic current transformer report,magneto optic current transformer presentation pdf,doc,ppt,magneto optic current transformer technology discussion,magneto optic current transformer paper presentation details,magneto optic current transformer, ppt, pdf, report, presentation, source. Moct optical current transformer system for metering. Magnetooptical electriccurrent sensor with enhanced sensitivity. Also explore the seminar topics paper on magnetooptical current transformer technology moct with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year electronics and telecommunication. The influence of birefringence on the measuring signal is discussed. The moct system is suitable for outdoor application and has an accurate metering current range from less than 5 a to 3150 a using the same sensor. Ece 2120 electrical engineering laboratory ii a companion course to ece 2620 electrical circuits ii by dr. Optical current transformeroct is defined as sensors that directly or indirectly use optical sensing methods to measure electric currents. Electromagnetic modelling of power transformers for study. The principles of measuring currents in highvoltage lines by magnetooptical means are described. The physical origin of the magnetooptical effects is phenomenologically discussed.
The magneto optical current transformer is based on the faradays effect. Solar storm, magnetosphere, geomagnetic induced current, ionosphere, transformer saturation, relay protection. Magneto optical current transformer technology provides a solution. Magnetooptical electriccurrent sensor with enhanced. The history of magnetooptical effects is first introduced. Magneto optic current transducer consist of a sensor head located near the current carrying conductor, an electronic signal processing unit and fiber optical cables linking to these two parts. Optical current transducers for electrical power systems. Demagnetization of current transformers using pwm burden. The most interesting magnetooptic effect in transmission for magnetic field sensing is the faraday effect. It appears that the newly emerged magneto optical current transformer technology provides a solution for many of the above mentioned problems. The device developed is a magneto optic current transducer moct. The transformer is driven by the flux between the windings. The moct consists mainly of electronic and optic part. Magneto optic current transformer full seminar report, abstract.
In order to measure the electric current, power stations and substations make use of the current transformers that are of inductive type having windings and core. Magnetooptic current transformer free download as word doc. Very asymmetric magnetization current, increasing losses and creation of hot spots in the core, in the windings, and the metallic structural parts are adverse effects that occur in transformers. A fiberoptic current sensor focs is a current sensor for measuring direct current. Global magneto optic current transformer market 2019 by. Also get the seminar topic paper on magnetooptical current transformer technology moct with abstract or synopsis, documentation on advantages and disadvantages, presentation slides for ieee final year electronics and telecommunication engineering or ece students for the year 2016 2017. The device developed is a magnetooptic current transducer moct. To measure currents power stations and substations conventionally employ inductive type current transformers with core and windings. Explore magnetooptical current transformer technology moct with free download of seminar report and ppt in pdf and doc format. Optical current transformer oct is defined as sensors that directly or indirectly use optical sensing methods to measure electric currents. Current transformers electromagnetic industries llp. The magnetooptical current transformer is based on the faradays effect.
Also explore the seminar topics paper on magnetooptical current transformer technology moct with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year electronics and telecommunication engineering or. Magneto optic current transformer, ask latest information, magneto optic current transformer abstract,magneto optic current transformer report,magneto optic current transformer presentation pdf,doc,ppt,magneto optic current transformer technology discussion,magneto optic current transformer paper presentation details,magneto optic current transformer, ppt, pdf, report. Get magnetooptical current transformer technology moct seminar report and ppt in pdf and doc. Fiber optic current sensors and optical current transformers. Types of magnetic core materials for transformers custom. The magneto optic current transformer moct is a passive optical current transducer which uses light to accurately measure current on high voltage systems. The cst25 series is offered with a builtin sense winding allowing for ease of use. The flux diverges from the ends of the primary coil in all directions. Magneto optic current transformer technology moct by. Jul 12, 2017 no and for you to ask this makes me suspect you are not really an electrical engineer as your profile states. There are five different popular turn ratios available to choose from. Option to save your current transformer design for reference and comparison. Can we use a permanent magnet in a transformer, and why.
Optical current transformer polarization waves electric. The seminar topic is based on magneto optical current transformer presented byaishwarya verma0902011 2. The magneto optic current transformer moct measures the rotation angle caused by the magnetic field and converts it into a signal of few volts proportional to the electric currant. The transformer model used for this experiment is the equivalent circuit from the transformer model experiment, except we. Moctmagneto optic current transformer 1 electric current. With increasing drawbacks of conventional current transformers such as saturation of magnetic field under high current, electromagnetic interference and complicated insulation and cooling structures are driving the demand for advanced electrical equipment, for instance, magneto optic current transformer market over the. And the effect of load current and load power factor on the transformer currents. Moct optical current transformer system for metering 72. By using a singleended optical fiber around the current conductor that utilizes the magnetooptic effect faraday effect, focs measures uni or bidirectional dc currents of up to 600 ka within 0. Contents introduction ct purpose and demerits moct principle, design, working. Magnetic field evaluation in transformers and inductors by lloyd h. It uses the rotation of the plane of polarization by. Fiber optic transducers are ideally adapted to highvoltage environments as they are highly immune to electro magnetic interference and there is no galvanic connection.
Optical current transformer, fiber optic, current sensor, protection, current transducer. Jul 03, 2017 magneto optic current transformer technology moct analyzer is that photo detectors can only detect the intensity of light, rather than the orientation of polarizations. The paper presents the experimental results of the investigations of optical. In recent years optical current and voltage transducers have reached a high degree of maturity and started to compete with conventional instrument transformers. The current transformer ct is prone to the magnetic core saturation during the power system faults. Baytown, tx, usa when searching electronics, leave a space between. This transformer has two air coils that share a common flux. Basis for moctinteraction between the magnetic field of the primary conductor and the optical activity of glass material magneto optical current transformer is an. A current measurement technique using the magnetooptic or faraday effect, has been developed, tested, and demonstrated. Sep 01, 2015 first, a theoretical analysis was performed on the effect of temperature on the performance of the sensing element of paramagnetic rare earthdoped magneto optical glass material that can be used in an optical current transducer application.
Fiber optics current sensor free standing focsfs is a freestanding 3phase sensor system for 245 kv to 800 kv high voltage substations one system consists in. Download the seminar report for magneto optic current transformer. Particular attention is payed to using an optical fiber both as a transmission line and a measuring sensor. One of these devices is optical current transformer oct. This volume extends the circuit theory begun in the first volume into the field of magnetic circuits, and covers both heavycurrent power and lightcurrent control, measurement, and communication applications of magnetic. Magneto optical current transformer technology moct seminar report, ppt, pdf for ece students. To measure currents power stations and substations conventionally employ inductive type current transformers. Magneto optic current free download as powerpoint presentation. Magnetooptical current transformermoct seminar report. Department of optoelectronics, silesian university of technology, 2 krzywoustego st. In an conventional current transformers, there is a chance of saturation of magnetic field under high current, complicated insulation and cooling structure, a chance of electro magnetic interference. The moct measures the electric current by means of faraday effect.
Moctmagneto optic current transformer 1 free download as powerpoint presentation. Michael faraday discovered that the orientation of linearly polarized light was rotated under the influence of the magnetic field when the light propagated in a piece of glass, and the rotation angle was proportional to the intensity of the magnetic field. Effects of geomagnetically induced currents on power. Protection of power transformers against geomagnetically. The moct measures the electric current by means of faraday effect, which was first observed by michael faraday 150 years ago. Conclusion this magneto optical current transformer eliminates many of the drawbacks of the conventional current transformers. Pdf magneto optic current transformer technology moct. A shorted secondary winding of n turns carries current, which is 1 n. It consist of a sensor head located near the current carrying conductor, an electronic signal processing unit and.
Conventional current transformers becomes more and more bulky and costly. Light from a source enters an optical fibre polariser, which splits into two linear orthogonally polarized light. Michael faraday discovered that the orientation of linearly polarized light was rotated under the influence of the magnetic field when the light propagated in a piece of glass, and the rotation. In the power system instrumentation, the magneto optic current transformer plays a very crucial role. Magneto optic current transformer seminar report pdf. Optical technology applicationsbegan in 1986 with combined efforts of tva and abb.
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