KACO Powador XP500-XP550-HV TL - Manual (Page 87)

Operating Instructions Powador XP500/550-HV-TL Page 87
Parameters
8.7.12 Q(V) Control
Figure 71: Grid Voltage Control during Q(V) Control Enable
As you can see in the above picture, this Q(V) Control function is for the reactive power infusion even if grid is
in normal range (90 ~ 110%). Dead band rage is U
Target
±1%.
Here, you can calculate slope K Factor for Q(U) Control using an equation ΔQ/ΔU=K Factor, and the variables
which are ΔQ=cos(Phi)=0.95, Phi=18.2° and sin(Phi)=0.31. ΔU is the voltage difference between the measured
voltage and the specified parameter target voltage as a p.u. Therefore, you can decide slope k factor. For
example, if you want to infuse ΔQ at U
Target
±5% range and U
Target
=U
N
, the K value would be calculated as
0.31/0.05=6.2. The rage of ΔU is calculated from the end of the dead band.