It has the adv antages of high measurement accuracy, large. The seminar topic is based on magneto optical current transformer presented byaishwarya verma0902011 2. An optical current transformer in which an influence of a temperature change in a magnetooptic sensor unit is compensated to conduct measurements with high accuracy by the following structure. Advantages of optical current and voltage sensors and. Optical current transformer oct linkedin slideshare. 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. The measurements are contactless and the measured signal is transmitted by a light beam propagating in air or in optical fibers.
Aftab khan abb inc, 100 distribution circle, mount pleasant, pa 15666, usa abstract. The magnetooptic current transformer moct is a passive optical current transducer which uses light to accurately measure current on high voltage systems. Moct block diagram applications pros and cons conclusion 3. Optical current transformers trench group is a pioneer in innovation, leading the shift from analog to digital technologies in high voltage switchgears. With short circuit capabilities of power system getting larger and the voltage level going higher the conventional current transducers becomes more. Explore magnetooptical current transformer technology moct with free download of seminar report and ppt in pdf and doc format. The faraday effect is the rotation of the polarization state of light. Mar, 2014 download optical current transformer oct ppt for electrical engineering seminar.
A fiberoptic current sensor focs is a current sensor for measuring direct current. Beside inductive current transformers, oil or sf6 insulated, abb has 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. In this video you will learn about what is current transformer, important concepts of current transformer, how current transformer work, use of. Nov 17, 20 conclusion this magneto optical current transformer eliminates many of the drawbacks of the conventional current transformers.
Some of the main features of optical current transformer are. Fiber optical current transformer foct is a new type of electronic current transformer based on faraday magneto optical effect and ampere loop theorem. An optical metering unit omu combines optical current and voltage transducers moct and eovt in a lightweight and compact singlephase unit fig. Optical technology in current measurement seminar report.
One of these devices is optical current transformer oct. Fault mechanism of fiber optical current transformer based on. Arteches sdooct is a passive, modular optical current transformer that can be used for any voltage level. Michael faraday discovered that the orientation of linearly polarized light was rotated under the influence of the magnetic field when the. Magnetic optical current transformer market analysis and industry forecast from 2019 to 2026. Magnetooptical current transformer technology moct seminar. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. 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. A dissertation presented in partial fulfillment of the. Current measurement with optical current transformer. Brandle abb switzerland ltd, corporate research, ch5405 badendattwil, switzerland phone. Between two polarizers 4 and 5 having mutually different transmission polarized light directions, a faraday rotator 6 is disposed to form a magnetooptic sensor unit.
The magnetooptical current transformer is based on the faradays effect. It appears that the newly emerged magneto optical current transformer technology provides a solution for many of the above mentioned problems. Optical current transformer 1 1 free download as powerpoint presentation. The moctp system is suitable for outdoor application and has a continuous current. So we need some new measuring devices with high accuracy for power transmission lines. Also explore the seminar topics paper on magneto optical 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. Fiberoptical current transformer foct is an electronic current transformer based on faraday magnetooptic effect. Optical current transformeroct is defined as sensors that directly or indirectly use optical sensing methods to measure electric currents. Also explore the seminar topics paper on optical technology in current measurement with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year electrical and electronics. Optical current transformers are current sensors which work on the magnetooptic effect. Current transformer the mostused device for measurements of alternating currents in electrical high and mediumvoltage networks is the ct current transformer. In order to investigate the fault mechanism of foct, the output signal model of the foct photodetector. Optical current transformer moct s are another type of transducers,which are highly immune to emi moct uses optical sensing methods to measure electric currents. In order to investigate the fault mechanism of foct, the output signal model of the foct photodetector is established, and.
A current transformer transforms the current down to a reasonable level and provides an isolation barrier. Fault mechanism of fiber optical current transformer based. It appears that the newly emerged magnetooptical current transformer technology provides a solution for many of the above mentioned problems. Magneto optic current transformer linkedin slideshare. Mar 14, 2014 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. These sensors work by measuring the angle of rotation of a polarized beam of light. The global market is segmented by type, application, and region. Sdoict is a fully passive optical transducer that provides a digital measurement solution for metering and. Moct optical current transformer system for metering 72. The 10 current is translated to the 20 current by the turns ratio n. 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. Optical current transformer oct ppt topics for seminar. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects.
An optical current transformer in which two light beams coming from the same source successively pass through. Effect of modulation error on all optical fiber current. The design allows the installation of a second optical sensor head, in order to have an extended redundancy level for the system. Pdf current measurement with optical current transformer.
Beside inductive current transformers, oil or sf6 insulated, abb has 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. To assess the effect of the amplitude of the modulation signal on the output, the transformer is assumed that all optical devices used are ideal except the. Ppt moctmagneto optical current transformer powerpoint. Pdf research on error mechanism analysis and compensation.
The reduced size and increased accuracy of the omu compared to conventional oilfilled current and voltage transformers make the design particularly. 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 moct measures the electric current by means of faraday effect, which was first observed by michael faraday 150 years ago. The global optical current transformer market can be segmented on the basis of type, voltage range and application. The magnetooptic effect was discovered by sir michael faraday. Their task is the sampling of voltage and current for use in measurement and protection 15. Optical current transformer 1 1 transformer sensor free.
Extensive bandwidth, able to measure both dc and ac current up to. Explore magneto optical current transformer technology moct with free download of seminar report and ppt in pdf and doc format. Magnetooptical current transformer technology moct. To measure currents, power stations and substations conventionally employ inductive type current transformers. Pdf design and simulation of optical current transformer based. This eliminates costly problems of potential separation.
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. In the following, we will consider optical current and voltage sensors that have been developed at abb and examples of their applications. Introduction moctprinciple the magneto optical current transformer is based on the faradays effect. Moct magnetooptical current transformer seminar topics. Moctp optical current transformer system abb ag pdf. Fiber optic current sensors and optical current transformers. Optical current transformers are suitable for power system protection and can replace the magnetic current transformers. Transformer transformer,construction of magnetoptical of transformer,winding,equivalent circuit diagram,emf equation,theory of operation powerpoint ppt presentation free to view. The output is a low power optical signal which is then transferred to a merging unit which adapts it to communication protocols such as iec 6185092.
Optical transformers of the current making use of the magnetooptic phenomenon belong to the unconventional transformers. For a given inline typed optical current transformer, ignoring any other influenced factor, m. Optical measurement of currents in power converters. Contents introduction ct purpose and demerits moct principle, design, working. The same aluminum casting design covers all voltage ratings and all currents ratings. This brochure discuss how only eaton s cooper power series fuses can provide a comprehensive, costeffective, and easytorestore transformer overcurrent protection package consisting of transformer lowcurrent protection devices and currentlimiting fuse s through 38 kvplus the tool to easily.
Optical character recognition ocr is the technology used to distinguish printed or handwritten text characters within digital images of physical. Download the seminar report for magneto optic current transformer. May 05, 2015 optical current transformers are current sensors which work on the magnetooptic effect. Nonconventional current transformer enabling digital hv substations and smart grids with an optical iec 6185092le ethernet output. 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. An accurate current transducer is a key component of any power system instrumentation. Frequency response characteristics of oit outputs are obtained. The basic principle of fiber optic current sensors focs and optical current transformers octs is to measure polarization rotation due to the faraday effect. Pdf on jan 1, 2015, linyang chen and others published design and simulation of optical current transformer based on mixed programming of ansoft and.
This brochure discuss how only eaton s cooper power series fuses can provide a comprehensive, costeffective, and easytorestore transformer overcurrent protection package consisting of transformer lowcurrent protection devices and currentlimiting fuse s through 38 kvplus the tool to easily coordinate the. Oct 07, 2019 moctmagneto optical current transformer powerpoint ppt presentation. 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. Optical current transformer for gas insulated switchgear. Magneto optic current transformer seminar report pdf. Explore optical technology in current measurement with free download of seminar report and ppt in pdf and doc format. The 20 is measured with an ampere meter in most of the cases. These measurements form an essential part of operations and protection functions in the substation, and thus reliability and accuracy of voltage and current transformers vcts is important. Current transformers are used to measure primary cur. Optical current transformer 1 1 transformer sensor. Trench optical current transformers do not contain electronic parts and do not use oil or sf6 as insulation. Fiberoptic current and voltage sensors for highvoltage substations k.
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. Further elements of the measuring device, such as polarizers, mirrors 11 and y couplers 12, 14, may likewise advantageously be integrated. 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. Octs are based on faraday effect, interferometric principle, bragg grating and micromechanical sensors with optical readout. Current transformers cts and voltage transformers vts are used extensively in substations for measuring and monitoring voltage and current.
The development of power electrical systems causes attention to accuracy of protection elements and measurement values. Using an optical current transformer has several advantages, e. Optical overcurrent transformer protection product aid author. Based on the faraday effect, magnetooptical current transformers mocts provide numerous advantages as compared with conventional measuring transformers. Optical fibre current sensor for electrical power engineering. Optical current transducers for electrical power systems nist page. Magnetic optical current transformer market size, industry. Magnetooptical current transformer of high bandwidth and.
The faraday effect states that the rotation of the plane of polarization of a beam of light which passes read more optical current transformers. The moctp system is suitable for outdoor application and has a continuous current rating. Trench optical current transformers are based on faraday effect principle. The magneto optical current transformer is based on the faradays effect. The high accuracy optical current transformer optical ct for gas insulated switchgear gis using a silica optical fiber has been developed. Trench optical current transformers do not contain electronic parts and do not use oil or sf6 as insulation media. In an optical current transformer in which the faraday rotation of light in a waveguide 2 enclosing the current is measured, the waveguide 2 is designed as an integratedoptics singlemode waveguide embedded in a substrate 1. The linear birefringence was reduced by twisting the newly developed double coated optical fiber. In this paper, we described a comparison between optical current transformers and conventional current transformers. 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. Optical current transformer market global industry. Moctmagneto optical current transformer powerpoint ppt presentation. Silva 1, hugo martins 1,2, ivo nascimento 1,2, jose m. The faraday effect states that the rotation of the plane of polarization of a beam of light which passes read more.
During the forecast period, north america will be closely followed by asia pacific in terms of expected demand. Download the seminar report for magneto optic current. Pdf optical current sensors for high power systems. Optical current transformer, fiber optic, current sensor, protection, current transducer e 1 5 0 54. Download optical current transformer oct ppt for electrical engineering seminar. Fiberoptic current and voltage sensors for highvoltage. 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 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. 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.
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