A current measurement technique using the magnetooptic or faraday effect, has been developed, tested, and demonstrated. Ppt moctmagneto optical current transformer powerpoint. The seminar topic is based on magneto optical current. We propose a novel structure of the sensor head for optical current transducer oct, which consists of a bulk magneto optic glass with graded index grin and a ferromagnetic ring acting as. An accurate current transducer is a key component of any power system instrumentation. Aug 31, 2016 optical fiber current sensor ofcs based on faraday magneto optic effect has many advantages of immunity against electromagnetic interference, high sensitivity and wide dynamic range. Optical current transducer for electric power system 1994. Conventional current measurement in highvoltage and highemi. Oct 07, 2003 the optical current transducer also includes a magneto optic garnet comprising bismuth bi, iron fe, and oxygen 0. Mar 14, 1989 more particularly, this invention relates to a device for interfacing a light beam between a fiber optic cable and a faraday rotator which is utilized in energy metering systems having a magneto optical current transformer for sensing current in a energy transmission line. A current measurement technique using the magneto optic or faraday effect, has been developed, tested, and demonstrated. Magnetooptic overcurrent detection with null optical. Optical current transducer for electric power system. Diamagnetic tellurite glass and fiber based magnetooptical.
The light is communicated to a magnetooptic garnet that includes, among other elements, bismuth, iron and oxygen and is coupled to the conductor. It uses the rotation of the plane of polarization by a magnetic field exhibited in certain glasses. An accurate electric current transducer is a key component of any. Pdf magneto optic current transformer technology moct. This magneto optical current transducer eliminates many of the drawbacks of the conventional current transformers.
Conclusion this magneto optical current transducer eliminates many of the drawbacks of the conventional current transformers. Apr 01, 2000 read magneto optical current sensors of high bandwidth, sensors and actuators a. To measure currents power stations and substations. Moct magnetooptical current transformer engineering topics. Optical fiber current sensor ofcs based on faraday magnetooptic effect has many advantages of immunity against electromagnetic interference, high sensitivity and wide dynamic range. 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. Magnetooptical recording june 27, 2014 40 the university of alabama.
Manufacturing challenges of optical current and voltage. Moct magnetooptical current transformer seminar topics. The magnetooptic current transformer moct is a passive optical current transducer which uses light to accurately measure current on high voltage systems. Download moct ppt for seminar in electrical engineering. We theoretically and experimentally demonstrate that an appropriately designed. Over current detectors ocds are important components in system control but suffer from electromagnetic interference, noise, low response etc. Moct block diagram applications pros and cons conclusion 3. Optical interface for a magnetooptical current transducer. A fiberoptic current sensor focs is a current sensor for measuring direct current. Magneto optic current transformer full seminar reports, pdf seminar abstract, ppt.
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 imaging has developed rapidly over the last decade to emerge as a leading technique to directly visualise the static and dynamic magnetic behaviour of materials, capable of following magnetic processes on the scale of centimeters to submicrons and at timescales from hours to. Fiber optic components for fiber optic current transducer applications. Numerical simulations of eddy current magnetic fields were performed with parameters of the real sample. Introduction moctprinciple the magneto optical current transformer is based on the faradays effect. Optical current transducer for electric power system optical current transducer for electric power system liu, yanbing 19941101 00. According to the sensitivity of mfbg spectral lines to the magnetooptic coupling intensity varying with. February 7th, 2017 by afsal meerankutty 1 comment an accurate current transducer is a key component of any power system instrumentation. Magnetooptic current transformer polarization waves transformer. Moct technology provides solution to many of the problems of conventional current. Influence of magnetic field inhomogeneity on a magnetooptical current sensor.
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. Magnetooptical current sensors of high bandwidth magnetooptical current sensors of high bandwidth didosyan, y. The optical current transducer includes a light source and a polarizer that generates linearly polarized light received from a the light source. Magneto optic current transformer seminar report pdf. A current measurement technique using the magneto optic or faraday effect has been developed, tested, and demonstrated. It uses the rotation of the plane of polarization by a. Magneto optic current transducermoct ppt published in. Osa current sensor based on an integrated microring. Fiber optic components for fiber optic current transducer. Inherent temperature compensation of fiberoptic current. Oct 07, 2019 magnetooptical current transformer technology moct pdf magneto optic current transducermoct ppt.
Magnetooptical current transformer technology moct seminar. Magnetooptic current transformer free download as word doc. A current measurement technique using the magnetooptic or faraday effect has been developed, tested, and demonstrated. 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.
A magneto optical measuring transducer for use as a faraday rotator in a device to measure high currentsvoltages in response to a magnetic field created by the current to be measured by rotating the direction of polarization of a beam of polarized light characterized by the transducer having a first magnetically saturable part and a second part which has a paramagnetic behavior. The measured parameter is the geometrical position of the boundary between domains with opposite magnetizations. Explore magnetooptical current transformer technology moct with free download of seminar report and ppt in pdf and doc format. Contents introduction ct purpose and demerits moct principle, design, working. Magneto optic definition is of, relating to, or utilizing the influence of a magnetic field upon light. Download the seminar report for magneto optic current.
The magneto optic garnet is configured to be coupled to the conductor and is in optical communication with the polarizer. 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. Even though most of the applications will find their best solution with a standard transducer selected out of one of the 5 technologies mentioned, please contact your lem specialist if your needs are not totally met. In the present paper, a magneto optic element like terbium doped glass tdg has been experimentally studied for its use as an over current detector. Magnetic field transducer types comparison chart attribute probe technology type number of meas. 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.
Introduction an accurate electric current transducer is a key component of any power system instrumentation. Magnetooptical imaging has developed rapidly over the last decade to emerge as a leading technique to directly visualise the static and dynamic magnetic behaviour of materials, capable of following magnetic processes on the scale of centimeters to submicrons and at timescales from hours to. Magneto optic sensor based on electrogyration compensation and single quartz. Magnetooptical current transformer technology provides a solution. A magnetooptical measuring transducer for use as a faraday rotator in a device to measure high currentsvoltages in response to a magnetic field created by the current to be measured by rotating the direction of polarization of a beam of polarized light characterized by the transducer having a first magnetically saturable part and a second part which has a paramagnetic behavior.
Download the seminar report for magneto optic current transformer. 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. To measure currents power stations and substations conventionally employ inductive type current transformers with core and windings. The analyzer detects the rotation of the linearly polarized light caused by the magneto optic garnet. Other terms are optical current sensor and magnetooptical current sensor mocs. Magnetooptical current sensors of high bandwidth deepdyve. Pdf influence of magnetic field inhomogeneity on a magneto. Some important features of magnetooptic eddy current moec images realized in garnet films during introscopy process and behavior of domain structure in these films were revealed and are discussed. Wave propagation in the magnetooptical material and rotation of its plane of polarization. The magneto optic current transformer moct is a passive optical current transducer which uses light to accurately measure current on high voltage systems.
The magnetooptic garnet is configured to be coupled to the conductor and is in optical communication with the polarizer. Diamagnetic tellurite glass and fiber based magnetooptical current transducer article in applied optics 5429. To measure currents, power stations and substations conventionally. Magneto optical current transformer technology provides a solution. Physical on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. The moct measures the electric current by means of faraday effect. Magnetooptic current sensor the university of chicago. To measure currents power stations and substations conventionally employ inductive type current transformers. Magnetooptic definition is of, relating to, or utilizing the influence of a magnetic field upon light. Moct optical current transformer system for metering 72. Some important features of magneto optic eddy current moec images realized in garnet films during introscopy process and behavior of domain structure in these films were revealed and are discussed. Other terms are optical current sensor and magneto optical current sensor mocs. Mar 17, 2014 a ppt on magneto optic current transducer. Magnetooptical current transformer technology moct.
Conventional current transformers becomes more and more bulky and costly. Recently described devices using passive bulk optical sensor elements include the electrooptical voltage transducer eovt and magneto optic current transducer moct. The device developed is a magnetooptic current transducer moct. Magneto optic current transformer technology moct attish jain btech, eee, srm university kancheepuram kattankulathur 603203 abstract. Download moct seminar report and ppt to learn more. 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. Michael faraday discovered that the orientation of linearly polarized light was rotated under the influence of the magnetic field when the. As the most promising method among them, a current measuring method which uses a magneto optic effect called the faraday effect have been proposed.
Magnetooptical garnet materials in fiber optic sensor. It uses the rotation of the plane of polarization by. Pdf influence of magnetic field inhomogeneity on a. 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. The magneto optic garnet is configured to rotate the polarization of the linearly polarized light received from the polarizer. The device developed is a magneto optic current transducer moct. Magnetooptic definition of magnetooptic by merriamwebster. Note than an optical current transducer appears to be a conventional current transformer operated uninsulated at high voltage, and both reporting via, and powered by.
Fiberoptic current and voltage sensors for highvoltage substations. Pdf optical current sensors for high power systems. 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. 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 optical current transducer also includes a magnetooptic garnet comprising bismuth bi, iron fe, and oxygen 0. The magneto optical current transducer eliminates many of the drawbacks of the conventional current transformers. The expansion of the high voltage power transmission system since the 50s and 60s has aroused an interest in using optical techniques for measuring the electric current. Magnetooptical visualization of eddy current magnetic fields. An optical current transducer configured to sense current in the conductor is disclosed. A magnetooptical current measuring device includes a collimating lens arrangement for focusing a light signal into a parallel beam of light, which beam of light, when polarized is communicated through a faraday rotator which is disposed in surrounding proximity to the transmission line in which it is desired to measure the current flow. Sohlstrom, and ulf holm magnetooptical garnet materials in fiber optic sensor systems for magnetic field sensing. Contents introduction ct purpose and demerits moct principle.
The optical current transducer also includes an analyzer in optical communication with the magneto optic garnet. He will then propose a transducer, specific for your application. It uses the rotation of the plane of polarization by a magnetic field exhibited in certain glasses faraday effect. Performance of magnetooptical glass in optical current. In the magnetic field generated by an alternating current, the fe3o4 spnps lose energy and change the mrr temperature, which leads to a spectral shift in the mrr transmission. As the most promising method among them, a current measuring method which uses a magnetooptic effect called the faraday effect have been proposed. Download your reports for magneto optic current transformer. Free download complete engineering seminar magneto optic current transformer seminar report pdf. As the most promising method among them, a current measuring method which uses a. Properties and structure of faraday rotating glasses for. 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. Optical current transformeroct is defined as sensors that directly or indirectly use optical sensing methods to measure electric currents. As the power industry continues to develop toward high voltage and large capacity, the traditional electromagnetic current transformer based on electromagnetic induction principle exposes more and more problems. The principles of optical and optical fiber current sensor technology have been known.
Nonconventional instrument transformers based on intensity modulation of optical signals have been reported in the literature for more than 20 years. Magneto optic current transformer full seminar report, abstract. And then the main advantages and disadvantages of several. We investigate the various contributions to the temperature dependence of an interferometric fiberoptic current sensor employing spun highlybirefringent sensing fiber, in particular, the contributions from the fiber retarder at the fiber coil entrance, the spun fibers birefringence, and the faraday effect. Numerical simulations of eddy current magnetic fields were performed with parameters of. An ultrasmall integrated photonic current sensor based on a silicon microring resonator mrr with a cladding layer of fe3o4 superparamagnetic nanoparticles spnps is demonstrated. Diamagnetic tellurite glass and fiber based magneto. Axes hall probe spatial resolution dc field resolution over 0. Moct magneto optical current transformer engineering topics. Magneto optic current transformer market global industry. Overcurrent detectors ocds are important components in system control but suffer from electromagnetic interference, noise, low response etc. Pdf optical current transducers octs have clear advantages over conventional current transformers. A big question i have is whether an optical current transformer is the same thing or not.
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