Method, device and system for generating broadband traveling wave data of flexible direct current transmission line

The invention provides a broadband traveling wave data generation method, device and system for a flexible direct current transmission line. The broadband traveling wave data generation method comprises the following steps: acquiring a traveling wave distance measurement device recording file and a fault recording device recording file; intercepting high-frequency-band direct-current voltage waveform data from the wave recording file of the traveling wave distance measuring device, and intercepting low-frequency-band direct-current voltage waveform data from the wave recording file of the fault wave recording device; performing superposition fusion processing on the high-frequency-band direct-current voltage waveform data and the low-frequency-band direct-current voltage waveform data to generate broadband traveling wave data; according to the invention, the high-frequency-band DC voltage waveform data and the low-frequency-band DC voltage waveform data can be obtained, and the high-frequency-band DC voltage