Fault Characteristics and Control Strategies of Multiterminal High Voltage Direct Current Transmission Based on Modular Multilevel Converter

Table 1

Simulation parameters of MMC-MTDC system.

Parameters	Values
Rated capacity of MMC1	100 MVA
Rated capacity of MMC2	50 MVA
Rated capacity of MMC3	25 MVA
Transformer ratio of MMC1 ()	110 kV/86 kV
Transformer ratio of MMC2 ()	110 kV/86 kV
Transformer ratio of MMC3 ()	110 kV/86 kV
DC voltage	160 kV
Number of submodules of bridge arm	10
Modulation strategy	Nearest level modulation
Capacitor voltage balancing strategy	Capacitor voltage sort
Control mode of MMC1
Control mode of MMC2
Control mode of MMC3