Extensive bandwidth, able to measure both dc and ac current up to 100 harmonic and above. Optical measurement of currents in power converters. New dc current measurement technology with fiberoptic sensor. Extensive bandwidth, able to measure both dc and ac current up to 100 harmonic.
Optical current transducers for electrical power systems nist page. Optical technology in current measurement seminar report. The global optical current transformer market can be segmented on the basis of type, voltage range and application. Magnetooptical current transformer technology moct. The sensor perfectly integrates the magnetic field along the closed path described by the sensing fiber. 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. 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. Optical current transformeroct is defined as sensors that directly or indirectly use optical sensing methods to measure electric currents. The linear birefringence was reduced by twisting the newly developed double coated optical fiber. Experimental comparison of conventional and optical. February 7th, 2017 by afsal meerankutty 1 comment an accurate current transducer is a key component of any power system instrumentation. Current transformer white paper the basics of current transformers ratio the ct ratio is the ratio of primary current input to secondary current output at full load.
Explore magneto optical current transformer technology moct with free download of seminar report and ppt in pdf and doc format. Introduction moctprinciple the magnetooptical current transformer is based on the faradays effect. The principles of optical and optical fiber current sensor technology have been known for some. Polarity refers to the instantaneous direction of the primary current with respect to the secondary current and is determined by the way the transformer leads are brought out of the case. The faraday effect states that the rotation of the plane of polarization of a beam of light which passes read more.
The seminar topic is based on magneto optical current transformer presented byaishwarya verma0902011 2. Fiberoptic current and voltage sensors for highvoltage. The 20 is measured with an ampere meter in most of the cases. Trench optical current transformers are based on faraday effect principle. Love controls lttj series current transformers allow easy monitoring of the current flowing to your load. Dr andy gillooly the basic principle of focs and octs is to measure polarization rotation due to the faraday effect. These innovative current transformers provide digital output according to the iec 61850 standard for your metering and protection infrastructure. The paper presents the experimental results of the investigations of optical. The moctp system is suitable for outdoor application and has a continuous current rating. An optical current transformer in which two light beams coming from the same source successively pass through. Complete model development for an optical current transformer. The principles of measuring currents in highvoltage lines by magnetooptical means are described. Fiber optic current sensors focs and optical current. Moct block diagram applications pros and cons conclusion 3.
Fiberoptic current sensor focs in the fiberoptic current sensor a simple loop of optical fiber around the bus bar replaces the sophisticated head of the conventional transformer. If the plane of polarization rotates multiple times. 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. Moct is a passive optical current transducer which uses light to. This magneto optic current transformer is widely used in power systems and substations nowadays. Particular attention is payed to using an optical fiber both as a transmission line and a measuring sensor. The reduced size and increased accuracy of the omu compared to conventional oilfilled current and voltage transformers make the design particularly. Magneto optic current transformer market segmentation and. A fiberoptic current sensor focs is a current sensor for measuring direct current. Fiber optic current sensors and optical current transformers version. During the forecast period, north america will be closely followed by asia pacific in terms of expected demand. Frequency response characteristics of oit outputs are obtained. A dissertation presented in partial fulfillment of the. The magnetooptic effect was discovered by sir michael faraday.
Sdoict is a fully passive optical transducer that provides a digital measurement solution for metering and protection. An optical metering unit omu combines optical current and voltage transducers moct and eovt in a lightweight and compact singlephase unit fig. Optical current transformer market global industry. What is an optical current transformer and how do they. Fiber optic current sensors focs and optical current transformers oct author.
Optical current transformers are current sensors which work on the magnetooptic effect. Optical current transformer for gas insulated switchgear. Contents introduction ct purpose and demerits moct principle, design, working. Current transformer the mostused device for measurements of alternating currents in electrical high and mediumvoltage networks is the ct current transformer. Pdf optical current transducers octs have clear advantages over conventional current transformers. Some of the main features of optical current transformer are. The main challenge with conventional current transformers in. 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. The basics of current transformers nk technologies. 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. Optical current transformer is an alternative to the existing conventional current. Development of models for optical instrument transformers by. Get magnetooptical current transformer technology moct seminar report and ppt in pdf and doc. With over 30 years experience of the specialty optical fiber industry, fibercore ltd, the world leader in its field, is exclusively dedicated to the design, manufacture and commercialization of specialty fibers.
Arteches sdooct is a passive, modular optical current transformer that can be used for any voltage level. The response of optical current transformer is the response ability of magnetic field of optical current transformer. Octs are based on faraday effect, interferometric principle, bragg grating and micromechanical sensors with optical readout. Octs are the sensing services that directly or indirectly uses optical sensing methods to measure electric current. Karady, life fellow, ieee abstractseveral manufacturers offer optical current transformers octs to replace the conventional magnetic. Optical current transformers offer many benefits compared to conventional current trans. Department of optoelectronics, silesian university of technology, 2 krzywoustego st. The high accuracy optical current transformer optical ct for gas insulated switchgear gis using a silica optical fiber has been developed. The iccs consists of an inductive current transformer having a primary winding, a small core and a minimizedloss secondary winding. The magnetooptic current transformer moct is a passive optical current transducer which uses light to accurately measure current on high voltage systems.
Pdf on jan 1, 2015, linyang chen and others published design and simulation of optical current transformer based on mixed programming of ansoft and. Pdf optical current sensors for high power systems. Pdf design and simulation of optical current transformer based. Optical fibre current sensor for electrical power engineering. 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 current transformer moct s are another type of transducers,which are highly immune to emi moct uses optical sensing methods to measure electric currents. An accurate electric current transducer is a key component of any power system instrumentation. Experimental comparison of conventional and optical current transformers article in ieee transactions on power delivery 254. Moct optical current transformer system for metering 72.
Explore optical technology in current measurement with free download of seminar report and ppt in pdf and doc format. Optical current transformer oct is defined as sensors that directly or indirectly use optical sensing methods to measure electric currents. 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. A current transformer transforms the current down to a. Download the seminar report for magneto optic current. 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. The shunt resistor rsh is an integral part of the secondary. These sensors work by measuring the angle of rotation of a polarized beam of light. This easy to use device provides a 0 to 10 vdc signal into both low and high impedance circuits, and is easily scalable to your needs. Fiber optic current sensors and optical current transformers. 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. Flexible electronic fiberoptic current transformers fefoct are an alternative to conventional current transformers with inductive transducers for highprecision current measurement and power quality control, in medium and high voltage systems.
The influence of birefringence on the measuring signal is discussed. 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. Ieee trialuse standard for optical ac current and voltage sensing systems no shorttime thermal test is required for optical current transformers unless they use magnetic cores or wire windings. Michael faraday discovered that the orientation of linearly polarized light was rotated under the influence of the magnetic field when the. Download optical current transformer oct ppt for electrical engineering seminar. When the preset trip current is reached or exceeded, light pulses will be emitted. On subtractive polarity transformers the h1 primary lead and the x1 secondary lead will be on the same. Application of optical current transformers in digital. Introduction moctprinciple the magneto optical current transformer is based on the faradays effect. The faraday effect is the rotation of the polarization state of light. The 10 current is translated to the 20 current by the turns ratio n. Design and development of a lowcost optical current sensor.
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