InteliMains
NT
, SW version 3.2.0
InteliMains-NT-MCB-MGCB-3.2.0-Reference Guide.pdf,
©ComAp – April 2015
68
7.6.2.1
Principles of Power management
Internal conditions based on remaining load reserves and priorities are evaluated once a delay is
elapsed. If the load reserve is insufficient the gen-set is started after delay given by the setpoint
Pwr management:
#NextStrt del
is elapsed. Once the gen-set runs the controller evaluates stopping
conditions based on load reserves and priorities. If the reserve is sufficient enough to stop a particular
gen-set, it is stopped after delay given by the setpoint
Pwr management:
#NextStopDel
is elapsed.
All the time the system stop condition
– i.e. the binary input
Sys start/stop
deactivated
– is evaluated
as well. Once the delay given by the setpoint
Pwr management:
#SysAMFstopDel
has elapsed all
gen-sets in AUT mode are stopped. Following figure depicts the system activation and deactivation
logic.
System activation
System deactivation
Sys start/stop activation
in AUT mode
SysAMFstrtDel
Start of the whole system is
delayed by this time
NextStrt del / OverldNext del
Start of individual gen-set is
delayed by this time
NextStop del
Start of an individuel gen-set is
delayed by this time
Gen-set
started based
on Reserves
Gen-set
stopped
based on
Reserves
YES
NO
YES
NO
Sys start/stop deactivation
in AUT mode
SysAMFstopDel
Stop of the whole system is
delayed by this time
Stopping sequence of all gen-
sets in AUT mode
N
OTE
:
The setpoint
Pwr management:
OverldNext del
is used in the case gen-sets are running at 90% or
more of their nominal power. The setpoint
Pwr management:
OverldNext del
should be generally
shorter than the setpoint
Pwr management:
NextStrt del
. The shorter time always applies in such a
case (counting in that part of NextStrt del may have already been elapsed).
