A device and method for realizing simulated DC feedback failure of rail traffic

The invention relates to a device for realizing simulation of rail transit direct-current feed faults. The invention is characterized in that the device consists of an embedded system, a D/A conversion module, a translation amplification module, a V/I conversion module and an output interface, wherein, the embedded system is connected with the D/A conversion module; the D/A conversion module is respectively connected with the translation amplification module and the V/I conversion module, which are respectively connected with the output interface. The invention simulates production of each current-change waveform of short-circuit fault, overload, etc. of a rail transit direct-current feed line to validate protective functions of a direct-current protection device, e.g. transient current protection, time-delayed over-current protection, thermal inverse time protection, near-area short-circuit rising rate protection, and far-area short-circuit rising rate protection. The resolution of output waveforms is 100 us