High accuracy and traceable power quality instrument calibration using high-speed digitizing technique

Yang, Steven; Yan, Aaron Y. K.; Ng, Chris M. N.

doi:10.1109/cpem.2016.7540734

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…This gives a type B contribution to the relative uncertainty of the active power measurement of 0.03% (300 ppm, k = 2); this is comparable or smaller to the corresponding type A contribution estimated from the measurement error e readings. A proper expression of measurement uncertainty of a reference meter under low power factor and non-sinusoidal conditions is presently considered a research subject in itself [25,26]. to DUT-6.…”

Section: Measurements In the Laboratorymentioning

confidence: 99%

Active Energy Meters Tested in Realistic Non-Sinusoidal Conditions Recorded on the Field and Reproduced in Laboratory

Cultrera,

Germito,

Serazio

et al. 2024

Energies

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Metrological characterisation of static energy meters under realistic low power quality conditions is a basic requirement for proper grid control and fair energy billing. The paper reports about a new proposed methodology, where the meters are tested under conditions directly recorded at installation sites. The waveforms of voltages and currents are sampled using a portable instrument; they are reproduced in laboratory conditions with a phantom power generator, with a bandwidth covering up to the 40th harmonic. The recording site is a photovoltaic energy production facility, having a a nominal power of 50 kW, at the coupling section to the grid. These waveforms were then reproduced in the laboratory, and tested on different models of single- and three-phase commercial static energy meters; the models chosen represent both energy meters used by energy providers at the point of common-coupling, and also meters typically used for in-line monitoring by end users. The quantity of interest is the reading error of the measured energy, when tested with the conditions reproduced from the on-field measurements, in comparison with a reference meter. All tested energy meter models comply with the present international documentary standards, which require tests under low power quality conditions; nevertheless, there are models that show unacceptable errors (up to 25%) in the measurement of active energy when tested with the on-field recorded waveforms. This suggests that the standardised testing waveforms might, in some cases, be not fully representative of the actual conditions encountered in the field.

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Section: Measurements In the Laboratorymentioning

confidence: 99%

Active Energy Meters Tested in Realistic Non-Sinusoidal Conditions Recorded on the Field and Reproduced in Laboratory

Cultrera,

Germito,

Serazio

et al. 2024

Energies

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show abstract

“…In most cases, the calibration efficiency is not high enough; thus, the calibration workload is relatively large. To solve this problem, a calibration algorithm based on discrete Fourier transform (DFT) is provided in paper [17,18]. This method directly carries on the Fourier transform processing to the sampled data sequence, which has the advantages of fast operation speed and less computation.…”

Section: Introductionmentioning

confidence: 99%

A Nonlinear Calibration Method Based on Sinusoidal Excitation and DFT Transformation for High‐Precision Power Analyzers

et al. 2021

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For most high-precision power analyzers, the measurement accuracy may be affected due to the nonlinear relationship between the input and output signal. Therefore, calibration before measurement is important to ensure accuracy. However, the traditional calibration methods usually have complicated structures, cumbersome calibration process, and difficult selection of calibration points, which is not suitable for situations with many measurement points. To solve these issues, a nonlinear calibration method based on sinusoidal excitation and DFT transformation is proposed in this paper. By obtaining the effective value data of the current sinusoidal excitation from the calibration source, the accurate calibration process can be done, and the calibration efficiency can be improved effectively. Firstly, through Fourier transform, the phase value at the initial moment of the fundamental frequency is calculated. Then, the mapping relationship between the sampling value and the theoretical calculation value is established according to the obtained theoretical discrete expression, and a cubic spline interpolation method is used to further reduce the calibration error. Simulations and experiments show that the calibration method presented in this paper achieves high calibration accuracy, and the results are compensation value after calibration with a deviation of ± 3 × 10 − 4 .

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Laboratory Replication of Low Power Quality Conditions Observed on the Field for Testing Active Energy Meters

Cultrera,

Serazio,

Galliana

et al. 2024

2024 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

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High accuracy and traceable power quality instrument calibration using high-speed digitizing technique

Cited by 3 publications

References 2 publications

Active Energy Meters Tested in Realistic Non-Sinusoidal Conditions Recorded on the Field and Reproduced in Laboratory

Active Energy Meters Tested in Realistic Non-Sinusoidal Conditions Recorded on the Field and Reproduced in Laboratory

A Nonlinear Calibration Method Based on Sinusoidal Excitation and DFT Transformation for High‐Precision Power Analyzers

Laboratory Replication of Low Power Quality Conditions Observed on the Field for Testing Active Energy Meters

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