InteliCompact
NT
, SW version 2.1
InteliCompact-NT-2.1-Reference Guide.pdf, ©ComAp – May 2015
management is disabled, the gen-set will run or not depending only on the binary input Sys
Start/Stop and the start and stop will not depend on the load of the group.
The binary input Sys Start/Stop activates and deactivates the gen-set. If the input is not active,
the gen-set will stop with delay #SysAMFstopDel after the input has been deactivated and will
not start again. It can be started in MAN mode only. When the input is activated again, the
delay #SysAMFstrtDel will start to count down and after that the gen-set is activated and can
start due to power management.
NOTE:
The gen-set will take part of the power management (= will be active) only if the controller is in AUT
mode!
NOTE:
The gen-set performs load and VAR sharing whenever it is connected to the busbar i.e. it is
independent on whether the controller is in AUT or MAN mode or whether the power management is
active or not.
6.11.3 Reserves, minimal running power
The value
[%] is called relative reserve. It is the difference between the
actual relative load and 100%.
The value
[kW] is called absolute reserve. It is the difference between the
actual load of the group and the nominal capacity of currently loaded gen-sets.
Running ActPwr = the sum of the actual load of all active gen-sets within the group,
that are connected to the bus. In parallel to mains operation and baseload mode the
baseload level is used in the equation instead of the actual gen-sets load.
Running NomPwr = the sum of the nominal power of all active gen-sets within the
group, that are connected to the bus.
If the current system reserve drops below the adjusted reserve for start, the delay
#NextStrt Del will start to count down on the gen-sets, which have decided to start. If the
reserve remains under the limit for the entire countdown period, the gen-set(s) will start.
If the system reserve drops below zero (i.e. the system is overloaded), the delay
#OverldNext Del will start to count down on the gen-sets, which have decided to start. If the
reserve remains under the limit for the whole countdown period, the gen-set(s) will start.
If the system reserve goes above over the adjusted reserve for stop, the delay
#NextStopDel will start to count down on the gen-sets, which have decided to stop. If the
reserve still remains over the limit, the gen-sets will stop.
There are two pairs of setpoints for adjusting reserves for start and stop. Normally the pair
#LoadResStrt 1 and #LoadResStop 1 is active. By the binary input Load Reserve 2 the
second pair #LoadResStrt 2 and #LoadResStop 2 is activated.
With adjusting nonzero value to the setpoint #Min Run Power and activating the function by
binary input Min Run Power => based on the nominal power, the gen-sets needed for
equalizing the actual MinRunPower requirement are started (or kept running even if stop
reserve is fulfilled). Note, that LBI’s Min Run Power needs to be activated on all gen-sets in
the same time.
6.11.4 Priorities
The priority of the gen-set within the group is determined by the setpoint Priority. A lower
number represents “higher” priority, i.e. a gen-set with a lower number will start before another
one with higher number.
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