IGS-NT Combi, SW Version 3.0, ©ComAp – May 2013
IGS-NT-Combi-3.0 Reference Guide.PDF
NOTE:
Core power management is still fully functional.
Priority setpoints are not actually changed. Virtual values are used. If changing of priority setpoints is
required, they need to be changed and RHE needs to disabled and enabled again for the changes to take
place
Different sized engines (Load demand) swap (LDS)
Up to three running engines (priorities) can be swapped based on load demand (e.g. one “small” engine may
run on “small” load and swaps to another one, “big” engine that runs when load increases). This function is
availatible only in combination with absolute power management.
Activation: Pwr management:#PriorAutoSwap = LD DEMAND SWAP
Important setpoints: #PwrBandContr1, #PwrBandContr2, #PwrBandContr3, #PwrBandContr4,
#PwrBandChngDlUp, #PwrBandChngDlDn, Load reserve setpoints (depending on selected load reserve
set), Priority ctrl, Control group.
G1 G2 G3
Basic settings:
Contr. Addr = 2
Pwr management:
#PriorAutoSwap = LD DEMAND SWAP
Priority ctrl = SLAVE
#PwrBandContr1 = 1
#PwrBandContr2 = 2
#PwrBandContr3 = 2+3
#PwrBandChngDlUp = 10s
#PwrBandChngDlDn = 10s
Control group = COMMON
Basic settings:
Contr. Addr = 1
Pwr management:
#PriorAutoSwap = LD DEMAND SWAP
Priority ctrl = SLAVE
#PwrBandContr1 = 1
#PwrBandContr2 = 2
#PwrBandContr3 = 2+3
#PwrBandChngDlUp = 10s
#PwrBandChngDlDn = 10s
Control group = COMMON
Basic settings:
Contr. Addr = 3
Pwr management:
#PriorAutoSwap = LD DEMAND SWAP
Priority ctrl = SLAVE
#PwrBandContr1 = 1
#PwrBandContr2 = 2
#PwrBandContr3 = 2+3
#PwrBandChngDlUp = 10s
#PwrBandChngDlDn = 10s
Control group = COMMON
Basic settings:
Contr. Addr = 4
Pwr management:
#PriorAutoSwap = LD DEMAND SWAP
Priority ctrl = MASTER
#PwrBandContr1 = 1
#PwrBandContr2 = 2
#PwrBandContr3 = 2+3
#PwrBandChngDlUp = 10s
#PwrBandChngDlDn = 10s
Control group = COMMON
InteliMains
CAN
Figure: Load Demand Swapping example
EXAMPLE:
In this example the system is shown in previous figure. InteliMains assumes the role of master in priority
swapping and swappes priority of the engines based on user defined power bands. In power band 1, gen-set
with CAN address 1 will be running, in power band 2, gen-set with CAN address 2 will be running and in
power band 3, gen-sets with address 2 and 3 will be running.
Power bands are changed up if:
(Nominal power of all gen-sets in a particular band - Total generated power by gen-sets in power
management) < Reserve for start
or down if:
(Nominal power of all gen-sets in next lower band - Total generated power by gen-sets in power
management) > Reserve for stop
Power management using control groups
When a Bus-tie separates the gen-set groups, they can operate separately (power management, load
control, mode of function etc.). When GROUPLINK is active, all the gen-sets in according groups are controlled
by InteliMains with lower CAN address only.
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