摘要详情

ID / 提交时间

57 / 2023-10-07 10:05:30

标题

Design of magnetic shielding structures for non-contact measurement of current in triangularly arranged cables

关键字

triangular arrangement,non-contact measurement,magnetic shielding,mean shielding uncertainty

主题及专题

3.Power system and automation > (3) Smart grid and utility applications

状态

终稿

作者

Xingyu Zhou / College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Sichuan P.R., 610059, China

Dongsheng Cai / College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Sichuan P.R., 610059, China

Zhenyuan Zhang / Sichuan Provincial Key Lab of Power System Wide-Area Measurement and Control, School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

Peng Wang / Sichuan Provincial Key Lab of Power System Wide-Area Measurement and Control, School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

Arsalan Habib Khawaja / School of Information Engineering, Southwest University of Science and Technology, Mianyang, Sichuan P.R., China

Qi Huang / School of Information Engineering, Southwest University of Science and Technology, Mianyang, Sichuan P.R., China

摘要

The triangular arrangement of cables has the advantages of good magnetic field balance and compact structure, making it a commonly used arrangement in tunnel power cable lines. Accurate measurement of its current helps to make accurate judgment of the line operation status. However, the tunnel transmission method involves a complex line arrangement in a small space. Therefore, non-contact wide-range current measurement based on magnetic sensors is a better solution. In the face of uncertain magnetic interference in transmission tunnels, the use of magnetic shielding can suppress its effect on magnetic sensors. In this paper, an M-shaped magnetic shield structure is proposed for current measurement in a triangular arrangement with strong magnetic interference at random locations. Then, the thickness, position, axial length, gap width and location of the sensing areas of the structure were investigated. The effectiveness of the structure was verified by finite element analysis methods for measured currents of 200 to 2000 A. The structure was also validated by the finite element analysis method. The mean shielding uncertainty (MSU) of the shielding structure is verified to be 0.19% under the uncertainty of strong magnetic interference for a measured current of 2000 A. The M-shaped shielding structure is more resistant to interference than the C-shaped shielding structure and fits better into the triangular arrangement of the cable geometry.