Open AccessPower System Transient Current Sensor Based on Magnetoresistance Effect
Author(s) -
Lanxi Bi,
Mengke Wu,
Linbo Xu,
Shihang Sun,
Kaiping Yu,
Xiangjun Zeng
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/668/1/012081
Subject(s) - transient (computer programming) , wideband , amplifier , attenuation , signal (programming language) , current sensor , electronic engineering , bandwidth (computing) , linearity , acoustics , electrical engineering , computer science , engineering , physics , current (fluid) , telecommunications , optics , programming language , operating system
Aiming at the problem that the mixed use of overhead lines and cables causes serious refraction and attenuation of the traveling wave signal in propagation, which makes the traditional traveling wave sensor unable to adapt to the weak signal identification and recording requirements. A wideband sensor for detecting transient current signal of power system is developed. The detection principle of the anisotropic magnetoresistive sensor is analyzed, and the tiny signal precision differential amplifier circuit is designed. Based on the actual situation of the power system, a corresponding test environment was built to conduct transient current transfer tests. The experimental results show that the sensor has a high linearity in the 0-5MHz bandwidth, and is suitable for the extraction of various transient signals, especially in the power system traveling wave protection has high application value.