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

Table 2

Simulation parameters of three-terminal MMC-HVDC system.

Parameters	Value
Rated capacity of AC grid	300 MVA
Rated capacity of wind farm 1	100 MVA
Rated capacity of wind farm 2	200 MVA
Transformer ratio of MMC1 ()	220 kV/150 kV
Transformer ratio of MMC1 ()	110 kV/150 kV
Transformer ratio of MMC1 ()	110 kV/150 kV
Voltage of DC bus	±150 kV
Number of submodules of bridge arm	4
Control mode of MMC1
Control mode of MMC2
Control mode of MMC3
Modulation strategy	Carrier phase-shifted modulation
Capacitor voltage balancing strategy	Capacitor voltage sort