DKG-108 User Manual V-1.0
(10.08.2011)
-14-
Step configuration: 1.2.3.4.4.4.4.4
Step type: 3 Phase
Basic step rating: 1kVAr
Target
CosØ= 1.000
Inductive reactive load: 20kVar
LEGACY PROGRAM
STEPS
Request 1 2 3 4 5 6 7 8 kVAr
1
↑
1
1
2
↑
1 2
3
3
↑
1 2 3
6
4
↑
1 2 3 4
10
5
↑
1 2 3 4 4
14
6
↑
1 2 3 4 4 4
18
7
↑
1 2 3 4 4 4 4
22
8
↓
2 3 4 4 4 4
21
9
↓
3 4 4 4 4
19
10
↑
1
3 4 4 4 4
20
The unit has reached the target
cosø
in
10 periods, by operating 1 step at each
period.
During this time the
cosø
had been
different from the target and the
reactive power counter has recorded
reactive power.
The unit has made 10
contactoroperations.
The unit has reached the target
cosø
with 6 banks in service.
OPTIMAL PROGRAM
STEPS
Request 1 2 3 4 5 6 7 8 kVAR
1
↑
4 4 4 4 4
20
The unit has reached the target
cosø
in
1 period. As the target
cosø
is reached
faster, the reactive power counter has
recorded less power.
The unit has made 5
contactoroperations. Thus longer
contactor life is achieved.
The unit has reached the target
cosø
with 5 banks in service. Thus capacitor
aging is kept at minimum.
5.1 COMPARAISON OF LEGACY AND OPTIMAL PROGRAMS
