SMA SC 500HE-US - Manual (Page 45)

SMA America, LLC 8 Reactive Power Regulation
Operating Manual SC500HEUS-eng-BE-BUS120320 45
8.1.10 "PFCtlW" Procedure
For the procedure "PFCtlW", the displacement power factor cos φ is set depending on the feed-in
capacity. The dependency is depicted by a parameterizable curve. The parameters of the curve may
be set to either make it rise or fall. The start and end points of the characteristic curve can be set via
parameters.
Figure 13: Characteristic curve for reducing reactive power depending on active power
On the basis of a linear characteristic curve with an upper and lower limit, a displacement power
factor cos φ can be regulated dependent on the active power fed in at the time. The start and end
points of the characteristic curve can be set via parameters. The course of the characteristic curve is
determined by the setting of the start and end points.
Parameters used "PF-PFStr"
"PF-PFExtStr"
"PF-PFStop"
"PF-PFExtStop"
"PF-WStr"
"PF-WStop"
1
PF-PFStop /
PF-PFExtStop
PF-PFStr /
PF-PFExtStr
PF-WStr
PF-WStop
leading
Current active power
lagging