Research and design of integral circuit for electronic current transformer

4th International Conference on Applied Materials and Manufacturing Technology

材料科学;机械制造

Zhang, Xingchao^1 ; Wang, Lu^1 ; Yang, Chengzhi^1

Faculty of Electrical and Information Engineering, Oxbridge College, Kunming University of Science and Technology, Kunming

650106, China^1

关键词: Application requirements;    Calibration tests;    Digital Integrator;    Electromagnetic current;    Electronic current transformer;    Sampling rates;    Structure design;    System testing;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/423/1/012112/pdf
DOI  :  10.1088/1757-899X/423/1/012112

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Aiming at the problem of serious magnetic saturation, small dynamic range and difficult digital processing of traditional electromagnetic current transformers, an electronic current transformer design method based on digital integrators is proposed. It includes selection of integral algorithm, determination of sampling rate and resolution, and structure design. Using the calibration test platform for system testing and analysis, the ratio error is less than ± 0.5%, the phase angle error is less than ± 20', and the entire system achieves the 0.2 class accuracy. The test results show that the electronic current transformer is stable, reliable and accurate, and can meet the practical application requirements.