The fiber optical current transformer foct with sine wave modulation has been widely used in the dc transmission project, while its fault rate is much higher than that of an electromagnetic current transformer, which seriously threatens the safe operation of power grid. Inrush may be high in magnitude, may contain a heavy dc offset with a long time constant, and it may have a unipolar halfwave nature. An accurate electric current transducer is a key component of any power system instrumentation. 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. But it has some disadvantages also, like if the magnetic fields induced by the currents through other conductors is sufficiently high, the fault current measured will have some errors. Similarly, current transformers take a high current and reduce it to typically 5 amps on the secondary winding so that it can be used with a watthour meter, ammeter, or protection relay. Moct magneto optical current transformer powerpoint ppt presentation. In the following, we will consider optical current and voltage sensors that have been developed at abb and examples of their applications. Optical current transformer are available in two different types that are magneto optical current transformer and fiber optical current transformer. Magnetooptical fiber sensor based on magnetic fluid article pdf available in optics letters 373. Generally, this phenomenon can be described as follows. 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. In a conventional current transformer, there is a chance of saturation of magnetic field under high current, complicated insulation and cooling structure, a chance of.
Download the seminar report for magneto optic current transformer. A current measurement technique using the magneto optic or faraday effect, has been developed, tested, and demonstrated. The reduced size and increased accuracy of the omu compared to conventional oilfilled current and voltage transformers make the design particularly. Apr 09, 2020 the expresswire request now final report will add the analysis of the impact of covid19 on this industry. Moct optical current transformer system for metering 72. Optical current transformer market global industry. So we need some new measuring devices with high accuracy for power transmission lines. The device developed is a magneto optic current transducer moct. The measurements are contactless and the measured signal is transmitted by a light beam propagating in air or in optical fibers. An optical current transformer based on anglecomparison technology had been reported and been constructed using magneto optical materials and iron core surrounding around one current carrying conductor, which is wounded by coils into which the detectable current is injected.
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. Research of an optoelectronic current transformer based on. Introduction moctprinciple the magneto optical current transformer is based on the faradays effect. The analyzer detects the rotation of the linearly polarized light caused by the magneto optic garnet. Optical current transformer is an alternative to the existing conventional current transformers, providing an advanced measurement solution for both metering and protection applications, based on a cuttingedge patented optical sensing technology. The device developed is a magnetooptic current transducer moct. Conclusion of the applicability of nonoptic magnetic field.
Optical current transformers are suitable for power system protection and can replace the magnetic current transformers. Study on magnetooptic balance type of optical fiber. Magneto optic current transformer seminar report pdf. Request pdf magneto optical current sensors of high bandwidth a new current transformer is described by means of new results concerning the domain wall excitation in orthoferrites. In order to investigate the fault mechanism of foct, the output signal model of the foct photodetector. A current transformer using magnetooptic sensor ieee. The magneto optic current transformer moct is a passive optical current transducer which uses light to accurately measure current on high voltage systems. 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. Magneto optic current transformer full seminar report, abstract. Get magnetooptical current transformer technology moct seminar report and ppt in pdf and doc. Pdf current measurement with optical current transformer. 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 use of the magneto optic current transformers are widening in the instrumentation and power station industry due to its features such as resistance to the high voltage and nonexistence of the saturation effects.
Instrument transformer basic technical information and. Download the seminar report for magneto optic current. Abb has also developed since 1990s optical current sensors, based on the faraday effect principle, whereby light is used to deduce the precise magnitude of current that is creating the magnetic field. 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. Fiberoptic current and voltage sensors for highvoltage.
Mar, 2014 download optical current transformer oct ppt for electrical engineering seminar. In contrast, the principle of operation of the new sensor is based on the direct registration of the domain wall. Potential transformers consist of two separate windings on a common magnetic steel core. Also get the seminar topic paper on magneto optical 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.
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. Optical technology applicationsbegan in 1986 with combined efforts of tva and abb. Advantages of optical current and voltage sensors and. Mar 17, 2014 magnetooptic current transducer moct ppt. The magneto optical current transformer is based on the faradays effect. It uses the rotation of the plane of polarization by a magnetic field exhibited in certain. It has the adv antages of high measurement accuracy, large.
Transformer inrush may be among the worst types of current for a magnetic ct to reproduce, because it has a combination of effects that put ct performance most at risk. Magneto optic current transformer full seminar reports, pdf seminar abstract, ppt, presentation, project idea, latest technology details, ask latest information. Fault mechanism of fiber optical current transformer based. It describes the rotation of polarisation of light propagating in the direction of a magnetic field. It uses the rotation of the plane of polarization by a magnetic field exhibited in certain glasses faraday effect. Optical measurement of currents in power converters. Magnetooptical current transformer technology moct seminar. Fiber optical current transformer foct is an electronic current transformer based on faraday magneto optic effect. Conclusion this magnetooptical current transducer eliminates many of the drawbacks of the conventional current transformers. February 7th, 2017 by afsal meerankutty 1 comment an accurate current transducer is a key component of any power system instrumentation. Pdf magneto optic current transformer technology moct.
Optical character recognition ocr is the technology used to distinguish printed or handwritten text characters within digital images of physical. An optical metering unit omu combines optical current and voltage transducers moct and eovt in a lightweight and compact singlephase unit fig. Bharati vidyapeeths college of engineering presented by shashank singhal 2. Nov 17, 20 conclusion this magneto optical current transformer eliminates many of the drawbacks of the conventional current transformers. Electrooptic voltage transducers eovt it appears that the tecbnology emerged magneto optical current transformer technology provides a solution for many of the above mentioned problems. Current transducers a bulkoptics current transducer abbs first generation magnetooptic current transducer moct with more than 10 years of field experience exploits the faraday effect in a. Ppt moctmagneto optical current transformer powerpoint.
Conclusion this magneto optical current transformer eliminates many of the drawbacks of the conventional current transformers. The development of power electrical systems causes attention to accuracy of protection elements and measurement values. Among these, magneto optical current transformer is highly preferred due to its innovative features and benefits regarding regulations. May 29, 2011 magnetooptical current transformer technology by prasanth sun may 29, 2011 5. In this video you will learn about what is current transformer, important concepts of current transformer, how current transformer work, use of current transformer. A current transformer transforms the current down to a reasonable level and provides an isolation barrier. Conventional current transformers becomes more and more bulky and costly.
Magneto optic current transformer technology moct by. 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. One of these devices is optical current transformer oct. In the power system instrumentation, the magneto optic current transformer plays a very crucial role. Oct 07, 2019 moctmagneto optical current transformer powerpoint ppt presentation. Based on the faraday effect, magneto optical current transformers mocts provide numerous advantages as compared with conventional measuring transformers. Optical current transformer oct is defined as sensors that directly or indirectly use optical sensing methods to measure electric currents. In the majority of magneto optical current transformers developed to date, the main parameter is the angle of light polarization faraday rotation. Current transformer the mostused device for measurements of alternating currents in electrical high and mediumvoltage networks is the ct current transformer. Global magneto optic current transformer market analysis. Octs are based on faraday effect, interferometric principle, bragg grating and micromechanical sensors with optical readout. 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.
Transformer transformer,construction of magnet optical of transformer,winding,equivalent circuit diagram,emf equation,theory of operation powerpoint ppt presentation free to view. The faraday effect is a magneto optical effect that causes a change of the state of polarisation of light in the presence of a magnetic field. Magneto optic current transformer linkedin slideshare. A fiberoptic current sensor focs is a current sensor for measuring direct current. Magnetoopticcurrenttransformer linkedin slideshare. A current transformer using magneto optic sensor abstract. 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. Magnetooptical current sensors of high bandwidth request pdf.
Pdf magnetooptical fiber sensor based on magnetic fluid. Current transformer errors and transformer inrush as. Magneto optic current transformer market 2020 by technology. Some of the main features of optical current transformer are. Magnetooptical current transformer of high bandwidth and. Transformer transformer,construction of magnetoptical of transformer,winding,equivalent circuit diagram,emf equation,theory of operation powerpoint ppt presentation free to view. Study on magnetooptic balance type of optical fiber current. Using an optical current transformer has several advantages, e. 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. Moct magnetooptical current transformer seminar topics.
Michael faraday discovered that the orientation of linearly polarized light was rotated under the influence of the magnetic field when the. 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. Conventional current transformers use the principle of electro. Pdf optical current sensors for high power systems. The moct measures the electric current by means of faraday effect, which was first observed by michael faraday 150 years ago. Effects in an optical medium that are dependent on the direction of light propagation. Optical current transformer oct ppt topics for seminar. Magneto optic current transformer market segmentation and. In contrast, the principle of operation of the new sensor is based on the direct registration of the domain wall dw positions in an orthoferrite plate. It appears that the newly emerged magneto optical current transformer technology provides a solution for many of the above mentioned problems.
In this paper, we described a comparison between optical current transformers and conventional current transformers. The optical current transducer also includes an analyzer in optical communication with the magneto optic garnet. Download optical current transformer oct ppt for electrical engineering seminar. Explore magnetooptical current transformer technology moct with free download of seminar report and ppt in pdf and doc format. Optical current transformeroct is defined as sensors that directly or indirectly use optical sensing methods to measure electric currents. Current measurement with optical current transformer. An optical current transformer using the faraday effect, characterized in that said optical current transformer comprises a magneto optic sensor unit having a faraday rotator 6. Extensive bandwidth, able to measure both dc and ac current up to. Magneto optical current transformer technology by prasanth. An optical current transformer oct with dual polarimetric configuration is evaluated using a magneto sensitive glass sf59 of 0. Apr 02, 2020 this magneto optic current transformer is widely used in power systems and substations nowadays. Get magneto optical current transformer technology moct seminar report and ppt in pdf and doc. Arteche optical current transformer is presented as an alternative to current conventional current transformers, offering an advanced solution for both measuring and protection applications based on optical technology.
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. Magneto optic current transformer market global industry. Feb 12, 2017 in this video you will learn about what is current transformer, important concepts of current transformer, how current transformer work, use of current transformer. The magneto optic garnet is configured to rotate the polarization of the linearly polarized light received from the polarizer. Conclusion this magneto optical current transducer eliminates many of the drawbacks of the conventional current transformers. The moct measures the electric current by means of faraday effect. The magneto optic current transformer is used in order to assist the smooth flow of the current with a high voltage. The moct measures the electric current by means of faraday effect, which. It is possible to measure currents up to 2 ka at high voltage 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. Optical current transformer market global industry analysis.
Optical current sensors ocss show several important features when compared with conventional current transformers cts, such as their having highly effective isolation from high line potentials offered by the dielectric nature of the optical fibers, freedom from the saturation effect which may be observed in conventional transformers, the. Optical current transducers for electrical power systems nist page. To measure currents power stations and substations conventionally employ inductive type current. This magneto optic current transformer is widely used in power systems and substations nowadays.
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