NOTE:
Using the GCB button in MAN mode the gen-set will not go to cool down and stop.
Continue to the cool down and stop phase.
6.11 Power management
MINT only
The power management is related to MINT application only. Power management is the process of
automatic starts and stops of gen-sets within the group, depending on current load, state of the gen-
sets and other conditions.
6.11.1 The concept
The power management is based on the load of the gen-sets, i.e. next gen-set will start when the load
of the group raises above certain level. A next gen-set will stop, when the load drops down below a
certain level. The process of determining of starts and stops is done in each controller; there is no
"master" in the system. Each of the controllers can be switched off without influencing the complete
system (except the situation when the respective gen-set will be not available...)
The load of the group is evaluated as so called reserve. The reserve is calculated as difference
between actual and nominal load of running gen-sets. The reserve can be calculated as absolute (in
kW) or relative (in %). Use the setpoint #PowerMgmt Mode to set the calculation method.
NOTE:
Power management based on relative reserves perfectly fits for applications, where the load portions
connected to the group at once are much lower than the gen-set capacity. This mode helps to achieve
maximal lifetime of the gen-sets, as they can be operated within optimal load range. The maximal
size of the load connected at once depends on number of actually working gen-sets. The more
gen-sets are connected to the busbar, the bigger a load portion can be connected at once.
Power management based on absolute reserves can be successfully used also for cases where the
load portions are similar to the gen-set capacity or even bigger. The goal of the absolute reserve mode
is that the system provides always the same reserve power capacity independent of how many
gen-sets are currently running and this why this mode perfectly fits for industrial plants with large
loads.
There is a new way of power management implemented (Efficient mode; LDS) since version IC-NT
2.0. Basic principles and functions are explained in the chapter below.
CAUTION!
The function of the controller is designed to handle the maximum sum of nominal power at 32000kW
(3200.0kW, depending on the power format in the controller). If the sum of nominal power of all gen-
sets connected to the intercontroller CAN exceeds these values the power format needs to be
changed accordingly.
Example: There are 20 gen-sets each with 1000kW of nominal power. The sum of the nominal power
is 20000kW. Therefore the decimal power format in 0.1kW cannot be used because the sum exceeds
32767. Therefore power format in kW needs to be chosen.
6.11.2 Basics
ï‚· The setpoint Pwr Management enables and disables the gen-set to be active within the power
management of the group and make automatic load demand start/stop or swap. If the power
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