A Fundamental Step-Up Method for Standard Voltage Transformers Based on an Active Capacitive High-Voltage Divider

Mohns, E.; Jiang, Chunyang; Badura, Henrik; Raether, Peter

doi:10.1109/tim.2018.2880055

Cited by 20 publications

(4 citation statements)

References 12 publications

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“…An oscilloscope has been used for determining this time difference Δtabs = tCHI -tPPS. The relative phase error Δφrel between the two channels was measured by the precision 2channel measuring system [15].…”

Section: Calibration Results Of the Programmable Two-channel Generatormentioning

confidence: 99%

Traceable calibration system for non-conventional current sensors with analogue or digital output

Chen

Mohns

Seckelmann

et al. 2021

2021 IEEE 11th International Workshop on Applied Measurements for Power Systems (AMPS)

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Section: Calibration Results Of the Programmable Two-channel Generatormentioning

confidence: 99%

Traceable calibration system for non-conventional current sensors with analogue or digital output

Chen

Mohns

Seckelmann

et al. 2021

2021 IEEE 11th International Workshop on Applied Measurements for Power Systems (AMPS)

Self Cite

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“…The 110 kV VT was designed with error limits of 0.005% for the voltage error and 0.005 crad for the phase displacement, and the 10 kV VT with 0.01% and 0.01 crad. These error limits were for the operating voltages of 20% up to 120% of the rated voltage [6][7][8]. The NCHVM performed the measurements twice, once before delivering the transformer to the NMI in July 2020 and again after receiving it back from the NMI in January 2021.…”

Section: Transfer Standardsmentioning

confidence: 99%

Comparison of voltage transformer measuring systems at 110 kV and 10 kV

Wang,

Emms,

Liu

et al. 2024

Metrology and Measurement Systems

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A comparison of measurements of voltage transformer (VT) voltage ratio and phase displacement was performed between the National Center for High Voltage Measurement (NCHVM), China and the National Measurement Institute (NMI), Australia, with two voltage transformers provided by the NCHVM being used as the travelling standards. Voltage ratios of the 10 kV/100 V transformer measured by the two institutes differed by less than 5 μV/V and the phase displacement by less than 6 μrad, while voltage ratios of the (110/p3 kV)/100 V transformer differed by less than 16 μV/V and 13 μrad. These results confirmed that measurement results of the two institutes agreed within detailed measurement uncertainties evaluation. The comparison further enhances the confidence in both methods, which are widely used for calibration of voltage transformers in the electricity industry.

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“…Method #2: PTB's results based on active capacitive high voltage divider are also presented. The measurement uncertainty of this method is 2 ppm for ratio error and 2 μrad for phase displacement [14]. The final comparison of the two methods is shown in Fig.…”

Section: Comparison With Ptb Under 110/ √ 3 Kvmentioning

confidence: 99%

Metrology and Measurement Systems

Liu

Chen

Wang³

et al. 2021

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Capacitive leakage and adjacent interference are the main influence sources of the measuring error in the traditional series step-up method. To solve the two problems, a new algorithm was proposed in this study based on a three-ports network. Considering the two influences, it has been proved that response of this three-ports network still has characteristics of linear superposition with this new algorithm. In this threeport network, the auxiliary series voltage transformers use a two-stage structure that can further decrease measurement uncertainty. The measurement uncertainty of this proposed method at 500/ √ 3 kV is 6.8 ppm for ratio error and 7 μrad for phase displacement (𝑘 = 2). This new method has also been verified by comparing its results with measurement results of the PTB in Germany over the same 110/ √ 3 kV standard voltage transformer. According to test results, the error between the two methods was less than 2.7 ppm for ratio error and 2.9 μrad for phase displacement.

show abstract

A Fundamental Step-Up Method for Standard Voltage Transformers Based on an Active Capacitive High-Voltage Divider

Cited by 20 publications

References 12 publications

Traceable calibration system for non-conventional current sensors with analogue or digital output

Traceable calibration system for non-conventional current sensors with analogue or digital output

Comparison of voltage transformer measuring systems at 110 kV and 10 kV

Metrology and Measurement Systems

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