Current Sensing Techniques: A Review

Ziegler, S.; Woodward, Robert C.; Iu, Herbert Ho-Ching; Borle, L.J.

doi:10.1109/jsen.2009.2013914

Cited by 640 publications

(369 citation statements)

References 57 publications

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“…Traditional CTs also have some physical drawbacks such as large volume and heavy weight, which limits the development and application of power protective systems. In order to solve the saturation problem and speed up substation intelligentization, electronic current transformers (ECTs), a method utilizing new semiconductor materials to design novel sensing technologies, have become one of the main research directions in measurement technologies [6][7][8][9]. Nowadays, some ECT technologies are commercialized, and related standards such as International Electrotechnical Commission (IEC) 61850 have been issued for Most sensing components within ECTs are semiconductor materials, meaning the reliability of ECTs would be worse than that of traditional CTs.…”

Section: Introductionmentioning

confidence: 99%

A Redundancy Mechanism Design for Hall-Based Electronic Current Transformers

et al. 2017

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Abstract:Traditional current transformers (CTs) suffer from DC and AC saturation and remanent magnetization in many industrial applications. Moreover, the drawbacks of traditional CTs, such as closed iron cores, bulky volume, and heavy weight, further limit the development of an intelligent power protection system. In order to compensate for these drawbacks, we proposed a novel current measurement method by using Hall sensors, which is called the Hall-effect current transformer (HCT). The existing commercial Hall sensors are electronic components, so the reliability of the HCT is normally worse than that of the traditional CT. Therefore, our study proposes a redundancy mechanism for the HCT to strengthen its reliability. With multiple sensor modules, the method has the ability to improve the accuracy of the HCT as well. Additionally, the proposed redundancy mechanism monitoring system provides a condition-based maintenance for the HCT. We verify our method with both simulations and an experimental test. The results demonstrate that the proposed HCT with a redundancy mechanism can almost achieve Class 0.2 for measuring CTs according to IEC Standard 60044-8.

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Section: Introductionmentioning

confidence: 99%

A Redundancy Mechanism Design for Hall-Based Electronic Current Transformers

et al. 2017

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“…Current sensing techniques are mainly based upon Ohm's law of resistance, the Faraday effect, magnetic field sensors and Faraday's law of induction [2]. The current sensors based on Ohm's law of resistance, like shunt resistor and trace resistance sensing, often provide the advantage of lower costs compared with other sensing techniques, and have the reputation of being reliable due to their simple working principle.…”

Section: Introductionmentioning

confidence: 99%

Rogowski Coil for Current Measurement in a Cryogenic Environment

Dai

Zhang

et al. 2015

Measurement Science Review

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A Rogowski coil based sensor for current measurement in a cryogenic environment and results of its application for paralleled high temperature superconducting (HTS) coil current sharing are presented. The current sensor consists of a Rogowski coil and an integrator, where the coil output voltage is proportional to the derivative of primary current and the integrator transfers the differentiation to normal state. The Rogowski coil has promising applicability at cryogenic circumstance because its body is made of low temperature materials. The integrator ensures a large bandwidth with feasible magnitude, which is vital for dynamic current measurement during the quench of the HTS coil. The proposed current sensor is used for current sharing measurement of two paralleled Bi2223 HTS coils, and the experimental results show that the measurement precision is better than 0.5%.

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“…Various commonly used current sensors are available, and include shunt resistors, Rogowski coils, current transformers, Hall sensors, and fiber-optic current sensors [1][2][3][4][5]. These commercial sensors have many limitations; for example, shunt resistors are limited to use in high-current applications, due to high power losses; while Rogowski coils are not suitable for the measurement of low-frequency currents, as the output of the coil must be passed through an integrator circuit, and the practical integrator is not perfect, and shows some input off-set voltage [6]. Current transformers are similar to Rogoswki coils, but in current transformers, the magnetizing inductance is not ideal, but shows some hysteresis and saturation [7].…”

Section: Introductionmentioning

confidence: 99%

Planar Hall Resistance Sensor for Monitoring Current

Kim¹,

Torati²,

Reddy³

et al. 2014

Journal of Magnetics

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Recent years have seen an increasing range of planar Hall resistive (PHR) sensor applications in the field of magnetic sensing. This study describes a new application of the PHR sensor to monitor a current. Initially, thermal drift experiments of the PHR sensor are performed, to determine the accuracy of the PHR signal output. The results of the thermal drift experiments show that there is no considerable drift in the signals attained from 0.1, 0.5, 1 and 2 mA current. Consequently, the PHR sensor provides adequate accuracy of the signal output, to perform the current monitoring experiments. The performances of the PHR sensor with bilayer and trilayer structures are then tested. The minimum detectable currents of the PHR sensor using bilayer and trilayer structures are 0.51 µA and 54 nA, respectively. Therefore, the PHR sensor having trilayer structure is the better choice to detect ultra low current of few tens nanoampere.

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Current Sensing Techniques: A Review

Cited by 640 publications

References 57 publications

A Redundancy Mechanism Design for Hall-Based Electronic Current Transformers

A Redundancy Mechanism Design for Hall-Based Electronic Current Transformers

Rogowski Coil for Current Measurement in a Cryogenic Environment

Planar Hall Resistance Sensor for Monitoring Current

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