Digital optics fibre current transformer
The principles of optical and optical fiber current sensor technology have been known for some considerable time, and some of the earliest papers on optical fibre measurement techniques have considered this topic the general advantages of the use of optical technology were discussed by rogers [1. Flexible electronic fiber-optic current transformers (f-efoct) are an alternative to conventional current transformers with inductive transducers for high-precision current measurement and power quality control, in medium and high voltage systems. Fiber-optic current transformer, comprising a current-carrying path covered by the magneto-optical sensor element in the form of a coil of optical fiber, optically coupled with the sensing element of the input tool in fiber polarized light signal, means dividing the polarized light signal into mutually orthogonal linear polarized components. Fiber optic current sensors and optical current transformers version: an01/1 release date: 30 january 2014 application notes the basic principle of fiber optic current sensors (focs) and optical current transformers (octs) is to measure polarization rotation due to the faraday effect the faraday effect is the rotation of the.
1 abstract—various applications of a fiber optic current sensor are explored flexibility and inherent beneficial features of the technology make it appropriate for many applications, including some novel protection applications. Monitoring of power transformer winding temperature using robust fiber optic sensing system abstract direct measurement of actual transformer winding temperature. Lumasmart winding hot spot temperature controller for ehv/uhv/hvdc transformers and generation, transmission and distribution transformers and reactors using our patented luxtron fluoroptic fiber optic temperature measurement technology. Seminar report magneto optical current transformer abstract an accurate current transducer is a key component of any power system instrumentation to measure currents, power stations and substations conventionally employ inductive type current transformers.
Return to session before stating on app fiber current sensor, strong light incidence apparatus is easy because the sensor can be equipped without opening the primary power circuit. Fiber optic cables •current/voltage data from non-conventional instrument transformer •analog or digital format traditional substation •electromechanical relays, programmable logic controllers and microprocessors •master-slave protocols •copper wire interfaces intelligent substation. 471 fiber-optic current sensor validation with triggered lightning measurements truong x nguyen, jay j ely and george n szatkowski nasa langley research center. Profotech technology as a basis for smart grid. Free standing fiber optic current sensor focs-fs for digital substations (245 - 800 kv) non-conventional current transformer enabling digital hv substations and smart grids with an optical iec 61850-9-2le ethernet output beside inductive current transformers, oil or sf6 insulated, abb has developed since 1990s optical current sensors, based on.
Recently, the optical voltage transformers are new and prospective instruments due to their outstanding advantages, such as the high input impedance, immunity of electromagnetic interference, no oil inside, wide band range, the digital and the analytic output etc. Fiber-optic current sensor (focs) is a spin off from a sensor developed for high-voltage substations and opens totally new perspectives in the field of high current dc measurement fig 1: faraday effect. Magneto-optic current transformer image source: abb a growing trend in the digital substation is the use of optical current and voltage transducers (sometimes called non-conventional instrument transformers - ncit.
Digital optics fibre current transformer
The magneto-optical current transformer is based on the faradays effect michael faraday discovered that the orientation of linearly polarized light was rotated under the influence of the magnetic field when the. The magneto-optic current transformer (moct) is a passive optical current transducer which uses light to accurately measure current on high voltage systems the moct system is suitable for outdoor insulator columns with preterminated fiber optic cable in the insulator. Fiber optic temperature sensors for manual and automated measurements for power transformers by also providing online data to support its functionality qualitrol offers numerous fiber optic products for precise transformer temperature monitoring. The university of calgary fiber optic current sensor network sandeep goyal 4 thesis svbmitted to the faculty of graduate stljdies in p4rtial fulfillment of the requirements for the degree of ma4ster of science departmeyt of electrical and computer exgixeerik calgary, aalberta september, 1997 @ sandeep goya1 1997.
- We estimated the influence of polarization crosstalk in a sagnac-type optical current transformer (oct) against sensor sensitivity, and confirmed that temperature dependence of faraday effect is canceled out by controlling the extinction ratio of transmission fiber with temperature change.
- The construction and use of optical sensors for the measurement of electric current and voltage is described the voltage sensor uses the electrooptic effect of bi 4 (geo 4) 3 the range is ±6 kv with a signal-to-noise ratio of 1500 for a 10 mhz system.
The latest generation of fiber optic current sensors has been to cover the demand for non-conventional current transformers having digital output and suitable for current measurement applications in 245 kv to 800 kv substations current transformers month dd, year | slide 5 fiber optics current sensor – free standing. The iccs consists of an inductive current transformer having a primary winding, a small core and a minimized-loss secondary winding development of optical current sensor fiber optics. The mixed-type optical fiber current sensor, using new magneto-optic material and having a miniature sensing head, has met the current transformer standards of class 05 set in gb 1028-87 and can be used outdoors with long-term stability. Design of optical current transformer design is divided into two parts: the electronics part and the optical design of the electronics part again divided into analog model and digital model the analog model of the electronics part is modelled with complex curve fitting method this method is basically to obtain the transfer function model.