Manual 37128A GCP-20 Series - Genset Control
© Woodward Page 89/190
Load-Dependent Start/Stop in Mains Parallel Operation
Parameter 82
Loadd.start/stop
at ter.3 ON
Load dependent start/stop: enable via terminal 3 ON/OFF
ON................ If the control input "Automatic 1" (terminal 3) is enabled, an auto-
matic start/stop is performed on the basis of the generator set point
real power 1 (
Parameter 26). If terminal 5 is enabled simultaneously,
terminal 3 has priority. The subsequent screens of this function are
displayed.
OFF.............. No automatic start/stop is performed. The adjustment of the pre-
specified set point value is always carried out. The subsequent
screens of this function are not displayed.
Parameter 83
Loadd.start/stop
at ter.5 ON
Load dependent start/stop: enable via terminal 5 ON/OFF
ON................ If the control input "Automatic 2" (terminal 5) is enabled, an auto-
matic start/stop is performed on the basis of the generator set point
real power 2 (
Parameter 27). If terminal 3 is enabled simultaneously,
terminal 3 has priority. The subsequent screens of this function are
displayed.
OFF.............. No automatic start/stop is performed. The adjustment of the pre-
specified set point value is always carried out. The subsequent
screens of this function are not displayed.
Single Generator in Mains Parallel Operation
The load-dependent start/stop function is activated when all of the following conditions have been met:
• the operation mode AUTOMATIC has been selected
• interchange power control (import/export power) has been activated by one of the two discrete inputs ("Auto-
matic 1" or "Automatic 2") (" I " or " E " power)
• one or both parameters "Load-dependent start/stop on terminal 3/5" (
Parameter 82 or Parameter 83) has been
configured to "ON".
Parameter 84
MOP: gen.minimum
load 0000kW
Load dependent start/stop: generator minimum set point power 0 to 2,000 kW
For the mains interchange (import/export) real power control to function, a genera-
tor power set point value is required. In many cases, starting of the engine should
only performed once a specific generator power set point value has been reached in
order to operate the generator with a reasonable degree of efficiency. For example:
At least 40 kW of real power has to be supplied by 80 kW generator before the en-
gine is to be started.
Parameter 85
Add-on delay
mains oper. 000s
Load dependent start/stop: start delay 0 to 999 s
Starting may be delayed even if the generator start power limit has been reached. In
order to avoid starting the engine in the event of short-term load swings, a start de-
lay may be entered here in seconds. The start power (
Parameter 84) must therefore
be present without interruption during this period of time, in order to ensure that
the engine is started. If the load drops below the set start power limit before the
time configured here expires, the counter is reset to 0.
Parameter 86
Shed-off delay
mains oper. 000s
Load dependent start/stop: stop delay 0 to 999 s
Stopping can be delayed even if the generator stop power limit has been reached. In
order to avoid shutting the engine down in the event of short-term load swings, a
stop delay may be entered here in seconds. The stop power (
Parameter 87) must
therefore be present without interruption during this period of time, in order to en-
sure that the engine is stopped. If the load rises above the set stop power limit be-
fore the time configured here expires, the counter is reset to 0.
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