Instrumentation & Measurement Magazine 25-5 - 9

Uncertainty component
Ratio U
u
U
Ratio I
u
I
Table 2 - Uncertainty Budget of the reference system for calibrating TLMS
Uncertainty (k=2)
Source
Voltage transformer
Voltage attenuator
Signal acquisition instrument
Current transformer
Current shunt
Signal acquisition instrument
Voltage transformer
Voltage attenuator
Phase uφ
Current transformer
Current shunt
u6
Signal acquisition instrument
Environmental interference
Combined standard uncertainty P
u
S
Expanded uncertainty
u P
S
Acknowledgment
This work was supported by National Key R&D Program of
China (2017YFF0205701).
References
[1] G. Rietvel and E. Houtzager, " High-accuracy reference setup for
system calibration of transformer loss measurement systems, " in
Proc. Int. Symp. High Voltage Eng., Aug. 2017.
[2] O. Petersons and S.P. Mehta, " Calibration of test systems for
measuring power losses of transformers, " NBS Technical Note
1204, pp. 5-6, 1985.
[3] E. So, " A current-comparator-based load loss standard for in-situ
calibration of transformer loss measuring systems, " IEEE Trans.
Power Delivery, vol. 3, no. 4, pp. 1363-1368, Oct. 1988.
[4] E. Mohns, P. Räther, and H. Badura, " An AC power standard for
loss measurement systems for testing power transformers, " IEEE
Trans. Instrum. Meas, vol 66. no. 9, 66, pp. 2225-2232, 2017.
[5] G. Rietveld et al., " Comparison of reference setups for calibrating
power transformer loss measurement systems, " IEEE Trans.
Instrum. Meas., vol. 68, no. 6, pp. 1732-1739, 2019.
[6] G. Ye, W. Zhao, and G. Rietveld, " Verification of a capacitive
voltage dvider with 6 μrad uncertainty up To 100 kV, " IEEE Trans.
Instrum. Meas., vol. 70, no. 1, 2021.
[7] W. E. Anderson, " Calibration of voltage transformers and highvoltage
capacitors at NIST, " J. Research of the National Bureau of
Standards (United States), vol. 94, no. 3, 1989.
[8] H. Shao et al., " The voltage coefficient determination of high
voltage capacitive divider by serial summation of voltage
transformers, " in Proc. CPEM 2014, pp. 772-773, 2014.
[9] N. L. Kusters and W. J. M. Moore, " The current comparator
and its application to the absolute calibration of current
transformers, " IEEE Trans. Power Apparatus Syst., vol. 80, no. 3,
pp. 94-103, 1961.
August 2022
, k=2
30 μW/VA
[10] K.-E. Rydler, S. Svensson, and V. Tarasso, " Voltage dividers with
low phase angle errors for a wideband power measuring system, "
in Proc. CPEM 2002, pp. 382-383, 2002.
[11] G. Tong, " A composite amplifier with high accuracy, " Acta
Metrologica Sinica, vol. 6, no.1, pp. 59-62, 1985.
[12] K. Rydler, T. Bergsten and V. Tarasso, " Determination of
phase angle errors of current shunts for wideband power
measurement, " in Proc. CPEM 2012, pp. 284-285, 2012.
[13] I. Budovsky, A. M. Gibbes, and D. C. Arthur, " A high-frequency
thermal power comparator, " IEEE Trans. Instrum. Meas., vol. 48,
no.2, pp. 427-430, 1999.
Wei Zhao (Senior Member, IEEE) has been with the National
Institute of Metrology China since 2014, and his research interests
mainly focus on high voltage measurement technologies.
He worked as a visiting scholar in National Measurement Institute
of Australia and National Metrology Institute of the
Netherlands in 2015 and 2019. He has led the National Key Research
and Development Program of China (2017YFF0205700)
for innovative electromagnetic sensing technology and high
voltage loss measurement. He received his B.S. and Ph.D. degrees
from Tianjin University, Tianjin, China in 2006 and 2012,
respectively.
Huanghui Zhang joined the Fujian Institute of Metrology in
Fuzhou, China in 2010. His research interests mainly focus on
big current, high voltage and related electromagnetic metrology
technology. He received the B.S. degree from Shandong
University, Weihai, China in 2007 and the Ph.D. degree from
Beihang University, Beijing, China in 2021.
You Li is a Senior Engineer with the Beijing Orient Institute of
Measurement and Test in Beijing, China. His research interests
IEEE Instrumentation & Measurement Magazine
9
15 ppm
5 ppm
10 ppm
10 ppm
3 ppm
10 ppm
15 μrad
5 μrad
10 μrad
3 μrad
10 μrad
5 ppm
15 μW/VA
sin(φ)
Sensitivity Coefficient
cos(φ)
cos(φ)
1
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