Error comparison and analysis of high-voltage current transformer based on different testing methods

被引：0

作者：

Liu G. ^{[1
]}

Xiong X. ^{[1
]}

Liao R. ^{[1
]}

Hao J. ^{[1
]}

Liu K. ^{[2
]}

机构：

[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing

[2] State Grid Sichuan Electric Power Corporation Metering Center, Chengdu

来源：

Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2019年 / 39卷 / 03期

关键词：

Absolute value of the variations of current error; Current transformer; Error analysis; Leakage current; Testing method;

D O I：

10.16081/j.issn.1006-6047.2019.03.016

中图分类号：

学科分类号：

摘要：

There are various methods to test the error of high-voltage current transformer, however, there is little analy-sis on the difference and accuracy among testing results of these methods. The error of high-voltage current transformer is tested and compared with single-phase testing, absolute value calculation of the current error considering the influence of voltage and current error testing under rated voltage. And the reason of their differences is analyzed. The results show that voltage has a negative influence on ratio error and phase displacement of current transformer, and its effect is mainly predominant at currents less than 20% of rated current. The larger the current is, the smaller the influence will be, and the influence decreases gradually until it can be neglected with the increase of current. The current errors tested at low voltage are inaccurate at low current, and the absolute value of the variations of current error is much larger than the results tested at high voltage, as a result, the current error of high-voltage current transformer should be tested directly at rated primary voltage. © 2019, Electric Power Automation Equipment Press. All right reserved.

引用

页码：103 / 107and113

共 13 条

[1]

Guo Y., Gao H., Effect of DC bias on transient transferring characteristics of current transformer, Electric Power Automation Equipment, 35, 12, pp. 126-131, (2015)

[2]

Instrument transformers-part 2: additional requirements for current transformers: IEC 61869-2-2012, (2012)

[3]

So E., Arseneau R., Bennett D., Et al., A current-comparator-based system for calibrating high-voltage current transformers under actual operating conditions, IEEE Transactions on Instrumentation and Measurement, 60, 7, pp. 2449-2454, (2011)

[4]

Instrument transformers-part 4: additional requirements for combined transformers: IEC 61869-4-2013, (2013)

[5]

Testing equipment for electrical energy meters: IEC 60736-1982, (1982)

[6]

Liu G., Fu Z., Hou X., Et al., Impact of external constant magnetic field on transfer characteristics of current transformer, Electric Power Automation Equipment, 33, 11, pp. 100-104, (2013)

[7]

Lesniewska E., Lisowiec A., Influence of the external magnetic field on operation of the new technology current-to-voltage trans-ducers, IEEE International Conference on Electrical Machines(ICEM), pp. 2239-2245, (2014)

[8]

Yang H.Y., Research on three-phase calibration method of HV three-phase combined transformer and its implementation, App-lied Mechanics and Materials, 568, 570, pp. 1191-1195, (2014)

[9]

Jiang W., Yang H., Jiang B., Research on three-phase calibration method of HV three-phase combined transformer and its implementation, Electrical Measurement & Instrumentation, 48, 7, pp. 46-49, (2011)

[10]

Zhang N., Liao H., Wu Y., Et al., Study of three-phase transformer test equipment combinations, Automation and Instrumentation, 32, 4, pp. 41-43, (2012)

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