On the basis of introduction of the VSC-HVDC control
system’s function, the paper points out the principal
configuration and the necessity of the control layer
structure, and proposes five layers structure adopted in
VSC-HVDC control system, namely, DC system control
layer, pole control layer, converters control layer, valves
control layer and separate control layer. The paper not only
introduced the layered principal and the five layers’ control
function and scope, but also according to the relationship
between the each layers, analyzed and researched
preparatory scheme, which supply the reference for
software.