METHOD AND DEVICE FOR MEASURING CURRENT

Embodiments of the present invention relate to a method and a device for measuring a current. The method includes: measuring a temperature between a first sampling point and a second sampling point on a copper bar carrying a current to be measured, and outputting a first signal according to the measured temperature; outputting a second signal after sampling and filtering the first signal; detecting the first voltage signal at the first sampling point and the second voltage signal at the second sampling point, sampling and filtering a difference between the first voltage signal and the second voltage signal, and outputting a third voltage signal; restoring the second signal to a temperature value representing a temperature between the first sampling point and the second sampling point, calculating a resistance value between the first sampling point and the second sampling point according to the temperature value; restoring the third voltage signal to a voltage value representing a voltage between the first sampling point and the second sampling point; and calculating the value of a current between the first sampling point and the second sampling point according to the voltage value and the resistance value.