Modeling and simulation of optical current transformer using operational amplifiers

Ashraf, Hafiz Muhammad; Abbas, Ghulam; Ali, Usman; Rehman, Saif ur

doi:10.1109/icee.2017.7893440

Cited by 4 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, it cannot be used for DC measurement because of its sensing principle [ 7 , 8 , 9 , 10 ]. While an optical transformer can measure both alternating current (AC) and DC signals, the temperature stability and mechanical properties of optical crystals result in the low measurement accuracy of this instrument [ 11 , 12 , 13 , 14 , 15 , 16 ]. Commonly used methods for measuring DC current include shunt methods, magneto-resistance, and magneto-optical effects.…”

Section: Introductionmentioning

confidence: 99%

Study of Current Measurement Method Based on Circular Magnetic Field Sensing Array

Zhang

et al. 2018

Sensors

View full text Add to dashboard Cite

Classic core-based instrument transformers are more prone to magnetic saturation. This affects the measurement accuracy of such transformers and limits their applications in measuring large direct current (DC). Moreover, protection and control systems may exhibit malfunctions due to such measurement errors. This paper presents a more accurate method for current measurement based on a circular magnetic field sensing array. The proposed measurement approach utilizes multiple hall sensors that are evenly distributed on a circle. The average value of all hall sensors is regarded as the final measurement. The calculation model is established in the case of magnetic field interference of the parallel wire, and the simulation results show that the error decreases significantly when the number of hall sensors n is greater than 8. The measurement error is less than 0.06% when the wire spacing is greater than 2.5 times the radius of the sensor array. A simulation study on the off-center primary conductor is conducted, and a kind of hall sensor compensation method is adopted to improve the accuracy. The simulation and test results indicate that the measurement error of the system is less than 0.1%.

show abstract

Section: Introductionmentioning

confidence: 99%

Study of Current Measurement Method Based on Circular Magnetic Field Sensing Array

Zhang

et al. 2018

Sensors

View full text Add to dashboard Cite

show abstract

“…It has advantages, such as high insulation strength, a large dynamic range, a wide frequency band, strong anti-interference ability, no magnetic saturation, ferromagnetic resonance, a small size, a light weight, and a low cost. In principle, it is very suitable for measuring lightning currents [21].…”

Section: Introductionmentioning

confidence: 99%

Lightning Current Measurement Form and Arrangement Scheme of Transmission Line Based on Point-Type Optical Current Transducer

Ge,

Yin,

Wang

2023

Sensors

View full text Add to dashboard Cite

Lightning strikes are the main cause of transmission line faults, and the accurate lightning current number is an important basis to guide scientific lightning protection. The use of sensors with excellent sensing performance to carry out lightning current monitoring on transmission lines is beneficial to the accumulation of key parameters of original lightning strikes, so it is necessary to study the lightning current measurement structure of transmission lines. In this paper, an optical current-sensing unit is used to monitor the lightning current on transmission lines. A measuring structure that can monitor key parameters of the lightning current under different types of lightning strikes is proposed. First, establish the lightning current return channel model and the equivalent model of the tower, study the influence of the transmission tower on the current in the lightning channel, and analyze the direct measurement position of the lightning current on the tower; establish the multi-wave impedance model of the tower, and build a multi-base tower. The simulation model of the transmission system analyzes the transmission characteristics of the lightning current on the transmission line and the lightning protection line in the case of different types of faults; from the perspective of the measurement of key parameters of the lightning current, the lightning current measurement structure of the transmission system is constructed to analyze different lightning strikes. The measurement effect of each monitoring position in the case of a lightning strike and the waveform characteristics of the fault current in the case of insulator flashover are analyzed.

show abstract

Modeling and analysis on the sensing characteristic of fiber optical current transformer

Wang

Liu

2017

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society

View full text Add to dashboard Cite

Modeling and simulation of optical current transformer using operational amplifiers

Cited by 4 publications

References 10 publications

Study of Current Measurement Method Based on Circular Magnetic Field Sensing Array

Study of Current Measurement Method Based on Circular Magnetic Field Sensing Array

Lightning Current Measurement Form and Arrangement Scheme of Transmission Line Based on Point-Type Optical Current Transducer

Modeling and analysis on the sensing characteristic of fiber optical current transformer

Contact Info

Product

Resources

About