ABB ACS800-67 - Fieldbus Control

System description 29
 Fieldbus control
Fieldbus control of the grid-side converter is performed via the rotor-side converter NDCU
control unit. The principle of reference and actual value chains in the control are shown in
the diagram below. For details, see ACS800-67(LC) doubly-fed induction generator control
program firmware manual [3AUA0000071689 (English)].
WTC Converter controllers
Rotor-side converter
Reactive power reference/
Power reference
Torque reference
Grid-side converter
Reactive power reference
DC voltage reference
Reactive power actual value
Power actual value
Torque actual value
Reactive power actual value
Actual power
Speed actual value
CW
SW
CW
SW
Faults
Alarms
voltage reference