5000A抗直流偏磁CT现场校验技术仿真  

Simulation of Field Calibration Technology for 5000A Anti DC Bias Current Transformer

作　　者：丁稳房[1] 曹慕雁 DING Wen-fang;CAO Mu-yan(School of Electrical and Electronic Engineering,Hubei University of Technology,Wuhan Hubei 430068,China)

机构地区：[1]湖北工业大学电气与电子工程学院,湖北武汉430068

出　　处：《计算机仿真》2023年第5期145-149,共5页Computer Simulation

基　　金：2019湖北省技术创新专项重大项目资助(2019AAA018);高效柔性电能变换装备研究及在交通领悟的应用(4115-00092)。

摘　　要：当前的电流互感器现场校验技术无法准确计算电流互感器的比差与角差,导致现场校验结果出现较大偏差。于是提出5000A抗直流偏磁电流互感器现场校验技术。计算5000A抗直流偏磁电流互感器的比差与角差,完成电流互感器误差分析;基于该误差,利用抗直流偏磁电流互感器现场校验装置,以升流器输出端和补偿电容串联模式,实现5000A抗直流偏磁电流互感器误差的现场校验。在MATLAB仿真平台中测试所提方法应用效果。抗直流偏磁电流互感器的输入电流从1000A提高至5000A,过程中研究方法对单匝贯穿类、开口类抗直流偏磁电流互感器的误差分析值与实际值一致;且误差现场校验后,互感器输出功率明显降低,功率控制效果也较为理想。Currently,some on-site calibration technologies are unable to accurately calculate the ratio difference and angle difference of the current transformer,resulting in a large deviation of results.Therefore,this paper pro-posed the on-site calibration technology for 5000A DC anti-magnetic-bias current transformer.Firstly,we calculated the ratio difference and angle difference of the current transformer and thus completed the error analysis on the current transformer.Based on this error,we used the DC anti-magnetic-bias current transformer to check the device on site.Meanwhile,we used the output end of the current amplifier and the compensation capacitor in series mode to achieve the on-site calibration for the error of 5000A DC anti-bias-magnetic current transformer was achieved.The application effect of the proposed method was tested on the MATLAB simulation platform.The input current of the designed current transformer is increased from 1000A to 5000A.In this process,we can find that error analysis values of the proposed meth-od for bar primary type current transformer DC anti-bias-magnetic current transformer and split-core DC anti-bias-mag-netic current transformer are consistent with the actual values.After checking the error on site,the output power of the transformer is significantly reduced,and the effect of power control is also ideal.

关 键 词：抗直流偏磁 电流互感器 现场校验 比差 角差 升流器 

分 类 号：TM93[电气工程—电力电子与电力传动]