Line-Current Compensated Single Toroidal-Core Current Transformer for Three-Phase Current Measurement

Korasli, C.

doi:10.1109/tpwrd.2006.883009

Cited by 9 publications

(4 citation statements)

References 2 publications

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“…An open-loop current transducer utilizes a Hall sensor to convert the magnetic field generated in the magnetic core into voltage. The voltage output of the Hall sensor is expressed as follows (1), where 𝑉 ℎ represents the output voltage of the Hall sensor, 𝐼 𝑐 ⃗⃗ denotes the current flowing within the Hall sensor, and 𝐵 ⃗ signifies the magnetic flux density passing vertically through the Hall sensor [9].…”

Section: A Open-loop Type Current Transducermentioning

confidence: 99%

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Analysis and Compensation of Phase Shift Errors of an Open-Loop Current Transducer Considering Eddy Current

Kim,

Han

et al. 2024

IEEE Access

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The open-loop current transducer comprises a magnetic core made of soft magnet material and includes a Hall sensor. Traction motors in applications such as electric vehicles tend to be driven at high speeds. It pushes the inverters to increase the fundamental frequency of the output current above 1 kHz. However, this high frequency current generates eddy currents in the magnetic core of the current transducers. They deteriorate the measurement data thereby resulting the amplitude error and the phase shift error. In this study, the errors of an open-loop current transducer due to eddy currents were analyzed through mathematical modeling and finite element method (FEM). Furthermore, the impact of the error on motor current control was studied. The phase shift error of the current transducer used in this study reaches 3.6 degree when the frequency of current was 1.5 kHz, resulting in about a 20% torque reduction during field-weakening operation at 200 kW, 22500 rpm. In order to correct the error, an online compensation method is proposed based on FEM simulation results. The phase shift error was verified through the experiments with an inductive load. The proposed method was also validated through the experimental results conducted for variable frequencies from 500 Hz to 1.5 kHz.

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Section: A Open-loop Type Current Transducermentioning

confidence: 99%

“…Current feedback is crucial for motor control in inverters, with various methods employed for current measurement including shunt resistance, current transformers, current transducers, Rogowski coils, and others [1], [2], [3]. This paper focuses on an open-loop current transducer utilizing a C-type magnetic core and a Hall sensor.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Compensation of Phase Shift Errors of an Open-Loop Current Transducer Considering Eddy Current

Kim,

Han

et al. 2024

IEEE Access

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“…MATLAB will read the simulation results and estimates the location of each fault. Figure 2 shows a 315 kV, 300 km, 50 Hz double-circuit transmission line compensated at the degree of 40%(C=29.11μF) is simulated, the SCs device is installed 150 km away from the terminal-M [28]. The voltage sources parameters and transmission line parameters are shown in Table.1 and Table.2, respectively.…”

Section: A Test Systemmentioning

confidence: 99%

New Fault-Location Algorithm for Series-Compensated Double-Circuit Transmission Line

Cai

Jun

2020

IEEE Access

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This paper proposes a new fault location algorithm to accurately locate the faults of seriescompensated double-circuit transmission line and improve the stability of power system operation, which is not affected by fault types. The proposed algorithm is based on asynchronous voltage and current at both ends of the line, the pre-fault voltage and current are used to synchronize time. The six-sequence component transformation is introduced, and with the help of the phase-sequence selection rule, the proposed algorithm eliminates the non-linear impedance of metal oxide varistor (MOV). Simultaneously, to confirm the robustness of the algorithm, different fault types, different fault initial angles and different fault resistances are taken into account in the system simulation. Not only that, the influence of series capacitors (SCs) installation positions, line parameter errors, different sampling rates and measurement errors are also tested. In general, the proposed fault-location algorithm has excellent performance. PSCAD/EMTDC and MATLAB are used in simulation studies, the results show that the maximum estimated error of faultlocation does not exceed 1.8631%.

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“…Apart from the work given in [1], no method exists for measuring three-phase line currents using only one single-core CT. This article describes the development of an innovative 100:1 single-core and single-stage CT for three-phase line current measurements.…”

Section: Introductionmentioning

confidence: 99%

Three-phase Current Measurement Using Single Toroidal-core Current Transformer

Korasli

2008

Electric Power Components and Systems

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100:1 single-core prototype current transformer is described to measure line currents simultaneously in balanced or unbalanced three-phase systems. The transformer core comprises a toroidal and a wye-shaped inner core accommodating primary line conductors and secondary detecting windings. Mutual effects of line current fluxes on current measurements are eliminated by three air-gap slits introduced along the toroidal section of the core. Calibration and performance of the transformer are discussed for burdens 0.1 and 1 in the current range 0-50 A.

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Line-Current Compensated Single Toroidal-Core Current Transformer for Three-Phase Current Measurement

Cited by 9 publications

References 2 publications

Analysis and Compensation of Phase Shift Errors of an Open-Loop Current Transducer Considering Eddy Current

Analysis and Compensation of Phase Shift Errors of an Open-Loop Current Transducer Considering Eddy Current

New Fault-Location Algorithm for Series-Compensated Double-Circuit Transmission Line

Three-phase Current Measurement Using Single Toroidal-core Current Transformer

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