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

LIU Gang; XIONG Xiaofu; LIAO Ruijin; HAO Jian; LIU Kun

doi:10.16081/j.issn.1006-6047.2019.03.016

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

更新时间：2025-04-25

- Error comparison and analysis of high-voltage current transformer based on different testing methods
- Vol. 39, Issue 3, Pages: 103-107+113(2019)
- 作者机构：
  
  1. 重庆大学输配电装备及系统安全与新技术国家重点实验室
  2. 国网四川省电力公司计量中心
- 作者简介：
- 基金信息：
- DOI：10.16081/j.issn.1006-6047.2019.03.016
  CLC： TM452
- Published：2019
- 稿件说明：
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[1]刘刚,熊小伏,廖瑞金,郝建,刘鹍.基于不同检测方法的高压电流互感器误差比较与分析[J].电力自动化设备,2019,39(03):103-107+113.

LIU Gang, XIONG Xiaofu, LIAO Ruijin, et al. Error comparison and analysis of high-voltage current transformer based on different testing methods[J]. 2019, 39(3): 103-107+113.
[1]刘刚,熊小伏,廖瑞金,郝建,刘鹍.基于不同检测方法的高压电流互感器误差比较与分析[J].电力自动化设备,2019,39(03):103-107+113. DOI： 10.16081/j.issn.1006-6047.2019.03.016.

LIU Gang, XIONG Xiaofu, LIAO Ruijin, et al. Error comparison and analysis of high-voltage current transformer based on different testing methods[J]. 2019, 39(3): 103-107+113. DOI： 10.16081/j.issn.1006-6047.2019.03.016.

摘要

目前对高压电流互感器的误差检测有多种方法

但缺乏对各检测方法所得误差结果差异性和准确性的比较分析。采用单相检测法检测电流互感器误差、考虑电压对电流互感器误差的影响计算电流误差的综合绝对值、额定电压下检测电流互感器误差3种检测方法分别对高压电流互感器的误差开展检测和比较分析

并对其差异原因进行了理论分析。结果表明

电压会使电流互感器的比差和角差向负方向偏移

当电流较小（特别是20%额定电流以下）时

电压对电流误差影响较大

随着电流增大

其影响逐渐减小直至可以忽略;低压下测得的电流互感器误差在电流较小时不够准确

电流误差的综合绝对值远大于在高压下直接测得的电流误差

对高压电流互感器的误差检测宜采用在额定电压状态下直接测量的方式。

Abstract

There are various methods to test the error of high-voltage current transformer

however

there is little analysis 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.

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