Fig 1.
Circuit of hybrid MMC topology.
Fig 2.
Double-closed loop control structure of hybrid MMC topology.
Fig 3.
Constant DC voltage control structure based on VSG strategy.
Fig 4.
Converter small signal transfer function structure of constant DC voltage station.
Fig 5.
AC port Impedance characteristics of constant DC voltage station.
Fig 6.
Constant active power control structure based on VSG strategy.
Fig 7.
Constant active power control structure based on traditional VSG strategy.
Fig 8.
Simulation structure based on VSG strategy.
Fig 9.
Switch form island to grid connection of MMC1.
Fig 10.
Active power step response by conventional dual closed loop control and VSG control used for hybrid topology.
Fig 11.
DC short-circuit fault simulation waveform.