*4.2. Comparison*

To evaluate and compare the performance of the proposed HDCCB over the conventional DC CB in [22,29,30], replication is done, and proper matching is noticed in all cases. Figure 16 illustrates a comparison between the CB voltage responses of the proposed HDCCB and the conventional DC CB. As shown in Figure 16, the voltage response of the proposed HDCCB tracks the voltage of the conventional DC CB. However, due to the fact that the DC capacitors have some charges, the level of DC voltage of the proposed HDCCB after the fault is more than the level of voltage of the conventional DC CB.

**Figure 16.** Comparison between the voltage response of the proposed HDCCB and the conventional DC CB after applying a short-circuit DC fault at 5 s.

Figure 17 demonstrates the comparison between the DC current response of the proposed HDCCB and the conventional DC CB after applying a short-circuit DC fault at 5 s. As shown in Figure 17, good matching is observed. The maximum breaking current capability of the proposed HDCCB and conventional DC CB are 8.4425 kA and 8.4207 kA, respectively. Thus, the difference between the maximum breaking current capability of the proposed HDCCB and conventional DC CB is 21.8 A.

**Figure 17.** Comparison between the DC current response of the proposed HDCCB and the conventional DC CB after applying a short-circuit DC fault at 5 s.

The maximum dissipated energy of the surge arrestor in the DC CB 1 of the conventional DC CB is 12.6388 kJ, which is 17.9 J more than the corresponding value of the proposed HDCCB. However, because of the capacitor charge, the dissipated energy of the surge arrestor in the DC CB 2 of the conventional DC CB is 7.7952 kJ which is 16.1 J less than the corresponding value of the proposed

HDCCB. But, the total dissipated energy of the surge arrestor of the proposed HDCCB and the conventional DC CB are approximately the same.
