Overload Current Interruption Protection Method based on Tunnel Magnetoresistive Sensor Measurement

Aiming at smart grid users who want to be able to instantaneously power off and protect related equipment under large fault current conditions, this paper proposes the overload current interruption protection method based on TMR sensor of high sensitivity, which can realize the smart grid overload current interruption protection through signal processing. After a certain circuit processing the signal, it can trigger the single chip microcomputer to control the relay to cut off, so as to realize the high sensitivity and overload circuit protection of the smart grid. Through simulation and experiment, the method is analyzed and verified, which is great significance to the protection of the overload current circuit breaker of smart grid equipment.