A Redundancy Mechanism Design for Hall-Based Electronic Current Transformers

Chen, Kun Long; Wan, Ren Shuo; Guo, Yi; Chen, Nanming; Lee, Wei Jen

doi:10.3390/en10030312

Cited by 12 publications

(5 citation statements)

References 34 publications

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“…The paper [11] demonstrates the development of a Hall effect current transformer (HCT). To solve the problem with the reliability of the design, the authors of the paper considered different combinations of the number of Hall sensors (up to twenty-four sensors).…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Development of the error reducing method for the determination of the alternating current amplitude without the use of current transformers

Neftissov,

Sarinova,

Kazambayev

et al. 2023

EEJET

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The object of the research is methods of current amplitude identification without using current transformers. Most solutions are built on reed switches, which have a limitation of the operation speed due to the mechanical nature of the reed contacts. Therefore, the time duration is a random variable with a significant variation. Thus, the problem that needs to be solved is the reduction of the error of current amplitude identification associated with the mechanical properties of contacts. According to the conducted literature analysis, the presence of contact bounce of reed switches increases the errors of sinusoidal current amplitude identification approximately up to 8–10 %. The mathematical modeling allowed us to investigate this phenomenon and research its influence on the method. The suggested model was then approved via in-situ modeling. Consequently, to reduce the errors of measuring the current amplitude via a reed switch, the replacement with an analog or discrete Hall sensor was proposed. A mathematical model of the discrete Hall sensor operation and a method for identifying the amplitude of the alternating current were developed. During the experiment, it was found that the analog Hall sensor has a limitation in measuring currents of large rates, at which the discrete sensor worked stably. Hence, the last was chosen. It is worth noting that the study of the behavior of the Hall sensor was limited to the value of the alternating current amplitude, four times the opening current with an average error of less than 3 %. The method suitable for discrete Hall sensors simplifies and reduces the cost of the measuring instrument design. However, the practical implementation of the suggested method requires also the application of devices concentrating the magnetic field on the Hall sensor surface

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Development of the error reducing method for the determination of the alternating current amplitude without the use of current transformers

Neftissov,

Sarinova,

Kazambayev

et al. 2023

EEJET

View full text Add to dashboard Cite

show abstract

“…The aim of this paper is to determine whether the inductive CT is able to ensure the required wideband accuracy to be applied in the measuring system as the reference source for the evaluation of the inductive CTs' current error and phase displacement at the harmonics of distorted current. The secondary current of the Danisense DC200IF fluxgatetechnology-based current transducer was used for comparison with the secondary current of our developed wideband inductive CT [21,22]. Its amplitude error in the frequencies range from 10 Hz to 5 kHz did not exceed ±0.1%, while the phase shift did not exceed ±0.1 • .…”

Section: Introductionmentioning

confidence: 99%

The Reference Wideband Inductive Current Transformer

Kaczmarek,

Stano

2023

Energies

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The aim of this paper is to show that the developed inductive current transformer may ensure the required wideband transformation accuracy and it may be applied, as the reference source, in the measuring system for the evaluation of the transformation accuracy of inductive current transformers for harmonics of distorted current. This device ensures 5 A and 1 A RMS secondary currents to provide the opportunity to use the differential measuring setup. Such solutions are characterized by the significantly reduced measurement uncertainty in relation to the comparative measurements made between two current/voltage channels. The problems required to ensure the high wideband transformation accuracy, including the self-generation phenomenon of the low order higher harmonics to the secondary current and a too-low frequency range of operation, were overcome in the design process. The values of its ratio error and the phase displacement of the developed reference wideband inductive current transformer did not exceed ±0.2%/° up to 1 kHz, ±0.4%/° from 1 kHz up to 1.5 kHz and ±0.5%/° from 1.5 kHz up to 3 kHz, as is required to perform the test procedure in accordance with the optional requirements for the inductive current transformers defined in the new edition of the standard IEC 61869-1.

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“…The installation position of DC electronic current transformers in converter stations is dozens of meters high above the ground, so the disassembly and reconnection of highvoltage joints pose difficulties [11][12][13][14]. In order to complete the field test, this study first establishes an equivalent model for the delay characteristics of DC current transformers.…”

Section: Introductionmentioning

confidence: 99%

Field Test Method and Equivalence Analysis of Delay Characteristics of DC Electronic Current Transformer

Zhu,

Tang,

et al. 2023

Energies

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DC electronic current transformer is the data source of the system control and protection device, so its measurement delay has always been concerned. In this paper, the DC current transformer is modelled equivalently and the key factors affecting the delay of shunt and the remote module are analyzed. A field test method for the delay characteristics of the DC electronic current transformer is proposed. Moreover, a complex multi-state large current generator and integrated test system are developed. On the basis of the IEC 60044-8 standard transmission protocol, the accuracy of standard signal acquisition with the shunt is better than 0.2%. The maximum output current of the established testing system is 600 A. Based on the field test in an actual HVDC project, transient step and various frequency signal components are applied for analyzing.

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A Redundancy Mechanism Design for Hall-Based Electronic Current Transformers

Cited by 12 publications

References 34 publications

Development of the error reducing method for the determination of the alternating current amplitude without the use of current transformers

Development of the error reducing method for the determination of the alternating current amplitude without the use of current transformers

The Reference Wideband Inductive Current Transformer

Field Test Method and Equivalence Analysis of Delay Characteristics of DC Electronic Current Transformer

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