Fault arc positioning system and method

The invention discloses a fault arc positioning system and method. The system comprises a processing module, an output module, an isolation module, an acquisition module and an upper computer module, the processing module is connected with the output module and used for generating a transmitting signal and transmitting the transmitting signal to the output module; the output module is connected with the isolation module and is used for converting the transmitting signal into an analog signal and injecting the analog signal into a cable through the isolation module; the isolation module is connected with the acquisition module and is used for transmitting a reflection signal generated in the cable to the acquisition module; the acquisition module is connected with the processing module and is used for converting the reflected signal into a digital signal and transmitting the digital signal to the processing module, and the processing module locates a fault arc according to the time delay of the reflected signa