Development method and comparative analysis of measurement accuracy of new broadband and wide range current transformers

Yan, Ping; Liu, Gang; Wang, Ruihan; Xia, Bingjun; Zhang, Jiefu; Li, Yang

doi:10.1109/ceect55960.2022.10030511

Cited by 4 publications

(3 citation statements)

References 1 publication

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“…where I0 is the excitation current, I1 is the primary side current, l is the average magnetic circuit length of the iron core, Z2 is the secondary winding impedance, Zb is the secondary load impedance, F is the frequency of operation, μ is the magnetic permeability of the iron core, Ψ is the hysteresis angle of the iron core, α is the secondary side impedance angle, N is the number of turns of the secondary winding, and S is the cross-sectional area of the iron core [7]. From the current transformer error calculation, Equations ( 3) and ( 4) can be seen on the impact of various parameters on the error, mainly including one or two secondary side winding parameters, iron core material, iron core structure parameters, and the first and second side of the current transformer current value [8].…”

Section: Analysis Of the Wide-range Current Transformer Measurement E...mentioning

confidence: 99%

Simulation characterization of measurement errors of the wide-range environmentally friendly current transformers

Zhao,

Liu,

Hou

et al. 2024

J. Phys.: Conf. Ser.

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To accurately measure the hundreds of millions of dollars of electricity consumed, the accuracy, safety, environmental friendliness, and reliability of current transformers become crucial. In response to these problems, there is an urgent need to develop an environmentally friendly current transformer that can adapt to the needs of power systems with wide-range current fluctuations. Therefore, in this paper, the simulation model of a three-phase current transformer with a combined transformer is developed. Simulation and verification work for the relationship between the error characteristics of environmentally friendly current transformers and the influence of magnetic field changes in each phase and the magnitude of the load on the secondary side. We compared the measurement errors before and after active compensation, demonstrating that environmentally friendly current transformers can increase the range and measurement flat frequency range while ensuring their 0.2S class measurement accuracy. This in turn proves the feasibility of wide-range environmentally friendly current transformers.

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Section: Analysis Of the Wide-range Current Transformer Measurement E...mentioning

confidence: 99%

Simulation characterization of measurement errors of the wide-range environmentally friendly current transformers

Zhao,

Liu,

Hou

et al. 2024

J. Phys.: Conf. Ser.

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“…The assessment of current harmonics generated by equipment connected to the power system is of paramount importance in the field of electromagnetic compatibility (EMC). Efficient assessment serves as a preventive measure against the propagation of electromagnetic disturbances and safeguards the overall power quality [ 1 , 2 , 3 , 4 , 5 , 6 ]. The standards IEC 61000-3-2 and IEC 61000-3-12 define the limits for the harmonic current generated by the low voltage equipment connected to the power system [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

The Accuracy of Evaluation of the Requirements of the Standards IEC 61000-3-2(12) with the Application of the Wideband Current Transducer

Stano,

Wiak

2024

Sensors

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The aim of this paper is to determine the conversion accuracy of the Danisense DC200IF (Danisense A/S, Taastrup, Denmark) wideband current transducer for its possible application to test electromagnetic compatibility requirements of the standards IEC 61000-3-2 and IEC 61000-3-12 with the digital power meter Yokogawa WT5000 (Yokogawa Electric Corporation, Tokyo, Japan). To obtain this goal for distorted current of main frequency equal to 50 Hz and in the frequencies range of higher harmonics from 100 Hz to 2500 Hz its amplitude error and phase shift are evaluated. Moreover, the measurable level of higher harmonics with the rated accuracy of the used precision power analyzer is also investigated. Finally, the measuring system is applied to determine the RMS values of current harmonics produced by the audio power amplifier in order to assess its compliance with the standard IEC 61000-3-12.

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“…This paper presents the evaluation of the tested inductive CTs' accuracy for harmonics of a distorted current in accordance with the optional accuracy class WB1 introduced by the new edition of the standard IEC 61869-1 [17]. It has been shown that it is not necessary to use error compensation techniques to obtain high wideband transformation accuracy for the transformation of a sinusoidal current with a frequency of 50 Hz into low-voltage inductive CTs manufactured by an international company [12,[19][20][21]. The evaluation of wideband transformation accuracy was performed for a distorted current composed of a fundamental component with a frequency of 50 Hz and a series of higher harmonics with frequencies ranging from 100 Hz to 3 kHz.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Optional Wideband Accuracy of Inductive Current Transformers in Accordance with the Standard IEC 61869-1 Ed.2

Stano,

Kaczmarek,

Kaczmarek

2023

Energies

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This paper presents the evaluation of tested inductive CTs’ accuracy for distorted current harmonics in accordance with the optional accuracy class WB1 introduced by the new edition of the standard IEC 61869-1 published in the year 2023. The tests were performed in compliance with the interpretation sheet IEC 61869-2:2012/ISH1:2022. Therefore, the resistive and the resistive–inductive loads of the secondary winding of tested inductive CTs were used, as this was required for the given test conditions. The results indicate that the units designed for the transformation of a sinusoidal current of a frequency of 50 Hz ensure the high wideband transformation accuracy of the distorted current harmonics, as demanded by the power quality monitoring and distorted electrical power and energy requirements. The key to this is proper design using modern magnetic material(s) for the magnetic core and its oversizing in relation to the requirements for a given accuracy class defined for the transformation of sinusoidal currents with a rated frequency. Both tested inductive CTs with a rated primary current RMS value equal to 300 A, class 0.2 and 0.5, ensured compliance with the requirements of the WB1 wideband accuracy class.

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Development method and comparative analysis of measurement accuracy of new broadband and wide range current transformers

Cited by 4 publications

References 1 publication

Simulation characterization of measurement errors of the wide-range environmentally friendly current transformers

Simulation characterization of measurement errors of the wide-range environmentally friendly current transformers

The Accuracy of Evaluation of the Requirements of the Standards IEC 61000-3-2(12) with the Application of the Wideband Current Transducer

Evaluation of the Optional Wideband Accuracy of Inductive Current Transformers in Accordance with the Standard IEC 61869-1 Ed.2

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