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

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