According to the basic function of VSC-HVDC control
system, this paper expounds the VSC-HVDC control system
structure and defines the control function and control scope of
every layer, and then points out the relationship between layers
and establishes follow chart to provide reference for software.
The establishment of the VSC-HVDC control system structure
helps to develop the top-down VSC-HVDC control system
design, which helps to design better control strategy for each
control layer