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. Conclusion this magnetooptical current transducer eliminates many of the drawbacks of the conventional current transformers. Optical current transformeroct is defined as sensors that directly or indirectly use optical sensing methods to measure electric currents. Optical current transformers based on optical fibre sensors are now being developed worldwide 14. Advanced photonics journal of applied remote sensing. 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. Contents introduction ct purpose and demerits moct principle, design, working.
A current measurement technique using the magnetooptic or faraday effect has been developed, tested, and demonstrated. Current transformer the mostused device for measurements of alternating currents in electrical high and mediumvoltage networks is the ct current transformer. 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. A single mode fiber inputs the optical power into the sensor head and two multimode fibers return the two optical outputs s. Moct magnetoopticcurrenttransformer linkedin slideshare. Verdet constants variation curves according to temperature for two materials and two wavelengths. The rate of movement of the magnet determines the velocity of the measurand. Design and development of a lowcost optical current sensor. Diamagnetic tellurite glass and fiber based magnetooptical.
Study on faraday magnetooptical effect optical current. The intrinsic advantages of optical sensor technology are very appealing for high voltage applications and can become a valuable asset in a new generation of. Oct 10, 2015 diamagnetic tellurite glass and fiber based magneto optical current transducer. Acousto optical effects principles and applications. Moct optical current transformer system for metering 72. Magnetooptical current transformer technology moct. Get magnetooptical current transformer technology moct seminar report and ppt in pdf and doc. Current transformers cts and voltage transformers vts are used extensively in substations for measuring and monitoring voltage and current. 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.
It uses the rotation of the plane of polarization by a magnetic field exhibited in certain glasses. Magneto optic current transformer optics free 30day. Magneto optical current transformer technology provides a solution. Bedienungsanleitung operating instruction optischer stromsensor.
The sensor exploits the faraday effect in an optical fiber and measures the path inte gral of the magnetic field along a closed loop. The optical current transformer basically consists of. Download the seminar report for magneto optic current transformer. Acoustooptical effects principles and applications.
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. As the largest electrical power show in china, this is the ideal forum for sdo to promote its advanced current sensing products in the most advanced market in the world for smart substation products. 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. Voltage and current sensors are the eyes and ears of the electric power system. The operation of the proposed sensor is based on measuring the magnetorestrictive induced strain of a nickel wire attached to an optical fiber. Download the seminar report for magneto optic current.
Current measurement, fiberoptic current sensor, current transducer, optical. 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. A current transformer transforms the current down to a reasonable level and provides an isolation barrier. To measure currents power stations and substations conventionally employ inductive type current transformers with core and windings. Our highly sensitive magneto optical sensors are the basis for the visualization of magnetic fields and are available in sizes up to 3 inches.
A wide variety of optical current transformer options are available to you, such as usage, coil number, and coil structure. Optical current transformer polarization waves electric. Magnetooptical current transformer technology moct seminar. With the development of state strong smart grid, optical current transducer based on faraday magneto optical effect will become an ideal transducer to service the grid. Twin alloptical magnetic probe for current metering and. A fiberoptic current sensor focs is a current sensor for measuring direct current. Advantages of optical current and voltage sensors and. It uses the rotation of the plane of polarization by a magnetic field exhibited in certain glasses faraday effect. The strain coupled to the optical fiber was detected by measuring the. If we want to make an optical current sensor with a low sensitiveness to temperature, fr5 material is right provided that we keep even if its verdet constant is lower than tggs one. Conventional current transformers becomes more and more bulky and costly. Moct block diagram applications pros and cons conclusion 3. The output voltage is proportional to the velocity for all positions of the magnet.
Diamagnetic tellurite glass and fiber based magnetooptical current transducer article in applied optics 5429. Applied sciences free fulltext optical current sensors for high. Each of these main groups can be divided in two subgroups. 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. Because of its current sensing principle, the electromagnetic current transducer used in power system presents many shortcomings that are difficult to overcome such as high insulation requirements, large volume, high cost, narrow range of linear measurement, the presence of ferromagnetic resonance phenomenon, as well as distortion of the secondaryside output waveform due to. Particular attention is payed to using an optical fiber both as a transmission line and a measuring sensor. Performance of magnetooptical glass in optical current. The device developed is a magnetooptic current transducer moct. The moct consists mainly of electronic and optic part. 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. The sensing head is connected to the processing unit by three optical fibers. We present to the reader the mathematical formalism used to describe this phenomena as well as the common.
Two prototypes based on the obtained glass and fibers were constructed. Fiberoptic dc current sensor for the electrowinning industry. Mar 17, 2014 magnetooptic current transducer moct ppt. Smart digital optics will exhibit its optical current sensing technology at the ep 2011 shanghai show from 2123 september 2011. Fiberoptic current sensor for the electrochemical industry. Optical fiber sensors polarimetric current sensors. The reversible conversion of quantum states between microwave and optical photons will hence enable the distribution of quantum information over long distance and significantly improve the scalability of hybrid quantum. Magnetostrictive transducers for optical fiber magnetic field. Pdf properties and structure of faraday rotating glasses.
Development of fiberoptic current sensing technique and. Fiber optic electrical sensors use magnetic and electrical fields caused typically by surrounding conductors to modulate the condition of light in optical materials. 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 current measurement technique using the magneto optic or faraday effect, has been developed, tested, and demonstrated. An introduction to acoustooptics scott e pollack physics 7810 fundamentals of optics and lasers university of colorado, boulder december, 2002 abstract this paper is a brief introduction to acoustooptic phenomena. Magneto optic current transformer seminar report pdf. Explore magneto optical current transformer technology moct with free download of seminar report and ppt in pdf and doc format.
Design and modeling of fiber optical current sensor based on. The seminar topic is based on magneto optical current transformer presented byaishwarya verma0902011 2. Conference proceedings papers presentations journals. The transducer is a piezoelectric crystal that is metalized at both ends for conduction of an electric current. Magneto optic current transformer linkedin slideshare. Optical current transducers for electrical power systems. The optical transducer can be classified as photo emissive, photoconductive and photovoltaic transducers.
Diamagnetic teo 2 znona 2 o glasses and fibers were fabricated and characterized for magneto optical current sensor applications. Effects in an optical medium that are dependent on the direction of light propagation. Light from a source enters an optical fibre polariser, which splits into two linear orthogonally polarized light. The magneto optic current transformer moct is a passive optical current transducer which uses light to accurately measure current on high voltage systems. Optical measurement of currents in power converters. An accurate electric current transducer is a key component of any power system instrumentation. 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. Magnetooptical current sensors constructed with zf glass. Osa distributed optical fiber dynamic magnetic field sensor. Fiber optic current sensors for high current surge. The photo emissive devices operate on the principle that radiation falling on a cathode causes electrons to be emitted from the cathode surface. The influence of birefringence on the measuring signal is discussed.
Cr magneticscurrent transducers, voltage transducers, ac. By using a singleended optical fiber around the current conductor that. Applications for the sensors can be found in forensics and quality control of magnetic materials. The principles of measuring currents in highvoltage lines by magnetooptical means are described. The professional energy monitoring company provides a complete line of current, voltage, frequency, power and power factor sensors that enables our customers to solve the challenges they face in an ever changing competitive environment.
The optical transducer convert light into electrical quantity. Mocs employs the faraday effect of magneto optical material, such as diamagnetic flint glass or paramagnetic rareearth glass, as sensing principle. Jul 11, 2014 quantum states encoded in microwave photons or qubits can be effectively manipulated, whereas optical photons can be coherently transferred via optical fibre and waveguide. Temperature dependence baffles the population of mocs in power system or some other areas. The moct measures the electric current by means of faraday effect. Mar 25, 2012 conclusion this magneto optical current transducer eliminates many of the drawbacks of the conventional current transformers.
A current measurement technique using the magnetooptic or faraday effect, has been developed, tested, and demonstrated. Sensors and actuators a, 351992 107 112 107 magneto optical current sensors constructed with zf glass s t pai, c m luo, j song and g x zhang gas discharge and plasma laboratory, department of electrical engineering and applied electronics, tsrnghua unwersity, beijing china, received june 4, 1991, in revised form december 6, 1991, accepted june 12, 1992 abstract the verdet constants and. The device developed is a magneto optic current transducer moct. The measurand is linked to the permanent magnet, which slides freely in the coils.
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