Implementation method of direct-current transient current broadband digital etalon

The invention discloses a DC transient current broadband digital etalon implementation method. A sensor, a signal conditioning module, an AD conversion module, a master control module and an optical fiber transceiver module are included. The sensor is connected in series in a current loop to obtain a direct current signal; the direct current signal is conditioned by the signal conditioning module and then enters the AD conversion module to obtain a corresponding discrete digital signal; the discrete digital signals are sent to a main control module, the discrete digital signals are processed through a discrete value filtering algorithm of a frequency domain, and real-time data of transient standard current data are generated; and according to a digital sampling protocol, the optical fiber transceiver module transmits real-time data of the transient standard current data to an external device. The method can be compatible with two transient tests of step response test and frequency response test at the same ti