Woodward 2301D, Инструкция по установке и эксплуатации, Страница: 25 / 130

Manual 26247 2301D/2301D-EC Digital Control
Woodward 17
Droop or Baseload operation is required when the generator is paralleled with an
infinite bus without a Generator Loading Control, Process Control, Automatic
Power Transfer and Load Control, Import/Export Control, or other load controlling
accessory, or when paralleled with incompatible governors (all Woodward
electric load-sharing systems are compatible). When running a single unit on an
infinite bus with a Generator Loading Control or Import/ Export Control, terminal
34 must be connected to terminal 30 to connect the Load Matching Circuit to the
load-sharing lines. The load-sharing lines must be wired to the Generator
Loading Control or Import/Export Control. The circuit-breaker auxiliary contact
will then be connected to the Generator Loading Control or Import/Export Control
and not to the 2301D Load Sharing And Speed Control.
This discrete input is used to change the control operation by selecting a second
set of dynamic terms to be used when the input is closed. This command is
normally used when the closed loop path needs two independent sets of
dynamics. The dual dynamics control function is enabled by the Service menu
item ENABLE DYNAMICS 2 W/CB.
Raise Speed/Load Contact (Terminal 35)
The input switch or relay contact used to activate the Raise Speed/Load
command connects to terminal 35 (Discrete Input E). This discrete input changes
the control operation by increasing the speed reference ramp when the CB Aux
input at terminal 34 is open, and by increasing the base load reference when in
base load mode. The speed reference ramp can increase only to a software
adjusted RAISE SPEED limit. The base load reference ramp can increase only to
a software adjusted BASE LOAD MAXIMUM limit. Both ramps increase at
software adjusted rates. De-selecting the Rated Speed command (described
above) takes command control away from the Raise Speed/Load input and
effectively disables the command.
With the contacts open (discrete input in the “FALSE” state), the control will stop
raising the speed or base load reference. Maintained simultaneous closure of this
Raise Speed/Load contact along with the Lower Speed/Load contact enables the
Remote Reference Input.
Lower Speed/Load Contact (Terminal 36)
The input switch or relay contact used to activate the Lower Speed/Load
command connects to terminal 36 (Discrete Input F). This discrete input changes
the control operation by decreasing the speed reference ramp when the CB Aux
input at terminal 34 (default) is open, and by decreasing the base load reference
when in base load mode. The speed reference ramp can decrease only to a
software adjusted LOWER SPEED limit. The base load reference ramp can
decrease only to a software adjusted BASE LOAD MINIMUM limit. Both ramps
decrease at a software adjusted rate. De-selecting the Rated Speed command
(described above) takes command control away from Lower Speed/Load input
and effectively disables the command.
With the contacts open (discrete input in the “FALSE” state), the control will stop
lowering the speed or base load reference. Maintained simultaneous closure of
this Lower Speed/Load contact along with the Raise Speed/Load contact enables
the Remote Reference Input.