Fault Handling Methods and Comparison for Different DC Breaker Topologies and MMC Topologies of the HVDC System

Figure 1

Structure and working principle of all-solid HVDC breaker (1st type). (a) Normal operation of all-solid HVDC. (b) Short circuit fault occurs. (c) The paralleled capacitor of each IGBT is charged through the loop. (d) The rest energy is consumed in the designed loop.

(a)

(b)

(c)

(d)