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

Figure 2

Structure and working principle of all-solid HVDC breaker (2nd type). (a) Structure of 2nd type of all-solid breaker. (b) The - loop is triggered and the anticurrent is generated in the designed loop. (c) When the current in thyristors is zero, all thyristors can be turned off. (d) will be charged again and the fault current can be cut off.

(a)

(b)

(c)

(d)