Global magneto optic current transformer market 2019 by. Moctmagneto optic current transformer 1 free download as powerpoint presentation. Magneto optic current transformer full seminar report, abstract. It also describes a special protective relay reacting on dc component in the transformer neutral current. Find data sheet, current ransformers, rectangular transformers, splitcore, transformers, primary wound transformers, ct selection chart, 1507 beaumont st. 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. Moct optical current transformer system for metering 72. Light from a source enters an optical fibre polariser, which splits into two linear orthogonally polarized light. Bharati vidyapeeths college of engineering presented by shashank singhal 2.
Optical current transducers for electrical power systems. Fiber optic transducers are ideally adapted to highvoltage environments as they are highly immune to electro magnetic interference and there is no galvanic connection. The primary is connected to the source and carries the current that establishes a magnetic field. Magneto optical current transformer technology moct seminar report, ppt, pdf for ece students. In the power system instrumentation, the magneto optic current transformer plays a very crucial role. An accurate electric current transducer is a key component of any power system instrumentation. The magneto optic current transformer moct is a passive optical current transducer which uses light to accurately measure current on high voltage systems. 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. To measure currents power stations and substations. 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. Magneto optical current transformer technology provides a solution.
Types of magnetic core materials for transformers custom. Can we use a permanent magnet in a transformer, and why. The main challenge with conventional current transformers in. 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. When the ac power source is connected to a transformer, a current flows in the primary winding, even when the secondary winding is opencircuited. Moct block diagram applications pros and cons conclusion 3. 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.
Moctmagneto optic current transformer 1 electric current. Conventional current transformers becomes more and more bulky and costly. Fiberoptic current and voltage sensors for highvoltage. Baytown, tx, usa when searching electronics, leave a space between. 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. 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. 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. Current transformers electromagnetic industries llp. The device developed is a magneto optic current transducer moct. It appears that the newly emerged magneto optical current transformer technology provides a solution for many of the above mentioned problems. Optical current transformeroct is defined as sensors that directly or indirectly use optical sensing methods to measure electric currents. Reports the latest research and development work of magnetooptical ac current transformer operating with faradays effect, intended for voltage systemsover. Then the types of magnetooptical effects are described, which include the varieties of the interactions of electromagnetic waves with magnetization or spins in solids.
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. The moct consists mainly of electronic and optic part. 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. Solar storm, magnetosphere, geomagnetic induced current, ionosphere, transformer saturation, relay protection. Protection of power transformers against geomagnetically. The currentcarrying conductor is passed through the hole in a toroid of magnetic material.
A comparison of current sense schemes listing advantages and disadvantages of each type. 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. Optical technology applicationsbegan in 1986 with combined efforts of tva and abb. Magnetooptic current transformer free download as word doc. Study on magnetooptic balance type of optical fiber. 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.
Effects of geomagnetically induced currents on power. 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. The core can be made from various materials, this post discusses some of them. This phenomen result in a unwanted influences on power transformers and the power system. The optical current transformer basically consists of. The current transformer ct is prone to the magnetic core saturation during the power system faults. 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. Abstractthis paper zes the perfanaly ormance of current transformers cts under the presence of geomagnetically. 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. Jul 12, 2017 no and for you to ask this makes me suspect you are not really an electrical engineer as your profile states. Optical current transformer oct is defined as sensors that directly or indirectly use optical sensing methods to measure electric currents. No and for you to ask this makes me suspect you are not really an electrical engineer as your profile states.
A shorted secondary winding of n turns carries current, which is 1 n. The physical origin of the magnetooptical effects is phenomenologically discussed. For power frequency, 25 hz to 400 hz service, the current transformer, called a donut transformer, or ct in the trade, is commonly employed. The magnitude and wave shape of the resulting magnetizing current pulse are given for of an example large power transformer when.
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. Magneto optic current transformer technology moct by. 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. Magnetooptical current transformer technology moct. Magneto optic current transformer technology moct attish jain btech, eee, srm university kancheepuram kattankulathur 603203 abstract. To suppress the effect of the linear birefringence in optical fiber sensor on measurement. Demagnetization of current transformers using pwm burden.
This is the current required to produce the flux in ferromagnetic core. 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 seminar topic is based on magneto optical current transformer presented byaishwarya verma0902011 2. The magnetooptic current transformer moct is a passive optical current transducer which uses light to accurately measure current on high voltage systems. 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. A current measurement technique using the magneto optic or faraday effect, has been developed, tested, and demonstrated. Magneto optic current transformer market global industry. The magnetooptical current transformer is based on the faradays effect. Magneto optic current free download as powerpoint presentation. Contents introduction ct purpose and demerits moct principle, design, working.
Magnetic field evaluation in transformers and inductors by lloyd h. Explore magnetooptical current transformer technology moct with free download of seminar report and ppt in pdf and doc format. Magneto optic current transformer technology moct analyzer is that photo detectors can only detect the intensity of light, rather than the orientation of polarizations. It uses the rotation of the plane of polarization by a magnetic field exhibited in certain glasses faraday effect. Optical current transformer polarization waves electric. Magnetooptic current transformer polarization waves transformer. 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. It uses the rotation of the plane of polarization by.
Magnetooptical electriccurrent sensor with enhanced sensitivity. 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. Performance of current transformers with geomagnetically induced currents bogdan kasztenny, normann fischer, douglas taylor, tejasvi prakash, and jeevan jalli schweitzer engineering laboratories, inc. The principles of measuring currents in highvoltage lines by magnetooptical means are described. Fiber optic current sensors and optical current transformers. 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 wide variety of optical current transformer options are available to you, such as usage, phase. Effects of geomagnetically induced currents on power transformers and power systems r. Study on magnetooptic balance type of optical fiber current. Simple transformer a transformer in its simplest form is shown in figure 19. The moct measures the electric current by means of faraday effect. Basis for moctinteraction between the magnetic field of the primary conductor and the optical activity of glass material magneto optical current transformer is an. 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.
Maybe a first year electrical engineering student would ask this question, but not someone with any kind of ee degree. Download the seminar report for magneto optic current. Performance of magnetooptical glass in optical current. Department of optoelectronics, silesian university of technology, 2 krzywoustego st. Magnetooptical current transformermoct seminar report. Find data sheet, current ransformers, rectangular transformers, splitcore, transformers, primary wound transformers, ct selection chart.
Current measurement with optical current transformer. 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. Pdf demagnetization of current transformers using pwm burden. There are five different popular turn ratios available to choose from. It consist of a sensor head located near the current carrying conductor, an electronic signal processing unit and. Get magnetooptical current transformer technology moct seminar report and ppt in pdf and doc. Moct optical current transformer system for metering. The moct measures the electric current by means of faraday effect, which was first observed by michael faraday 150 years ago. The history of magnetooptical effects is first introduced. Magnetooptical electriccurrent sensor with enhanced. Magneto optic current transformer full seminar reports, pdf seminar abstract, ppt, presentation, project idea, latest technology details, ask latest information. Download the seminar report for magneto optic current transformer. 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.
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. 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. Fiber optic current sensors and optical current transformers version. And the effect of load current and load power factor on the transformer currents. The paper presents the experimental results of the investigations of optical. Magneto optic current transformer seminar report pdf. The transformer model used for this experiment is the equivalent circuit from the transformer model experiment, except we. In recent years optical current and voltage transducers have reached a high degree of maturity and started to compete with conventional instrument transformers. Chapter 1 fundamentals of magnetics university of north. A current measurement technique using the magnetooptic or faraday effect, has been developed, tested, and demonstrated. Magnetic cores are used in transformers, which serve as the pathway of the flux. Particular attention is payed to using an optical fiber both as a transmission line and a measuring sensor. The flux diverges from the ends of the primary coil in all directions. To measure currents power stations and substations conventionally employ inductive type current transformers.
First, the phenomenon of part cycle, semi saturation of transformer cores due to gic is described briefly. This transformer has two air coils that share a common flux. A fiberoptic current sensor focs is a current sensor for measuring direct current. The device developed is a magnetooptic current transducer moct. Option to save your current transformer design for reference and comparison. Current transformer power system analysis free lecture pdf download resistance and leakage reactance of transformer or impedance of transformer power system analysis free lecture notes download theory of transformer on load, with resistance and leakage reactance in transformer power system analysis free pdf download. 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 most interesting magnetooptic effect in transmission for magnetic field sensing is the faraday effect.
Magnetooptical current transformer technology moct seminar. One of these devices is optical current transformer oct. 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. The influence of birefringence on the measuring signal is discussed. Electromagnetic modelling of power transformers for study. These current sense transformers are fully encapsulated allowing for a high isolation of 4000 vac between primary and secondary windings. The transformer is driven by the flux between the windings. Global magneto optic current transformer market analysis. Conclusion this magneto optical current transformer eliminates many of the drawbacks of the conventional current transformers. Download limit exceeded you have exceeded your daily download allowance. The magneto optical current transformer is based on the faradays effect. To download the current transformer design tool, enter and submit your contact information below. A wide variety of optical current transformer options are available to.
Pdf magneto optic current transformer technology moct. 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. The cst25 series is offered with a builtin sense winding allowing for ease of use. To measure currents power stations and substations conventionally employ inductive type current transformers with core and windings.