A Control Strategy for Ground Fault on the AC Side of MMC-HVDC System

Table 1

Performance comparison of three converter topologies.

Performance	Half-bridge MMC	Full-bridge MMC	Cascaded two-level converter
Scalability	Good	Good	Good
Switching frequency	Low	Low	Low
Harmonic wave content	Low	Low	Low
DC fault suppression	Have not	Have	Have not
Reactive power adjustment range	High	Very high	High