A Hybrid MMC Topology with dc Fault Ride-Through Capability for MTDC Transmission System

Table 1

Comparison of the MMC configurations with various SMs.

Features	Half-bridge MMC	Full-bridge MMC	Clamp-double MMC	Series-double MMC
SM circuit	HBSM	FBSM	CDSM	SDSM
dc fault blocking capability	×	√	√	√
Blocking time	×	18 ms	24 ms	18 ms
Number of SMs per arm
Number of IGBTs per arm
Number of diodes per arm
Number of capacitors per arm
Voltage levels
Estimated power losses	0.69%	0.96%	0.83%	0.83%