Fig .6 Simulation of the current fault component waveform when an internal fault occurs
From Fig. 6, it can be seen that when an internal fault occurs on the DC line the fault components of the positive current at 4 and 5 of the converter stations on both sides are both positive, and the fault components of the negative current are both negative. The fault current waveforms collected by the corresponding poles are positively correlated, with high similarity and small waveform distance.