V
1s
V
2s
V
1i
V
2i
Q
i limit
Q
s limit
V
Q
V
1s
V
2s
V
1i
V
2i
Q
i limit
Q
s limit
V
Q
Curve A Curve B
Others Italy MV & Italy LV
Figure 5-28 Q(V) parameters
Figure 5-29 FRT page
Figure 5-30 FRT Parameters
5.2.9. FRT (Fault ride through)
Some area requests that inverter should keep connected to grid when
grid voltage drops suddenly in few seconds. In these areas, users can
enable FRT function and adjust the parameters to meet the requirement.
100%
U1
0
t1
Fault occurence
t3
time
U
grid/
U
nom
Umin
Udrop
Disconnect from grid
Stay connected