(a)
(b)
(c)
(d)
Figure 13: Decay time of the fault current in HVDC line with different fault location (second new topology). (a) = 20 km, = 0 s, = 4 ms, and = 75 ms. (b) = 50 km, = 0 s, = 4 ms, and = 37 ms. (c) = 100 km, = 0 s, = 4 ms, and = 44 ms. (d) = 200 km, = 0 s, = 4 ms, and = 55 ms.