30
to shift the borderline 2 if the generating plant’s connection concept requires to
do so. Also in consultation with the network operator, a short-time disconnection
from the network is permissible if the generating plant can be resynchronized 2
seconds, at the latest, after the beginning of the short-time disconnection. After
resynchronization, the active power must be increased with a gradient of at least
10% of the nominal capacity per second (TC2007; 3.3.13.5, section 14).
Figure 6-4 Borderlines of the voltage profile of a type-2 generating plant at the network
connection point
RPI-M8/ M10/ M12/ M15/ M15A/ M20/ M20A/ M30 implements the FRT behavior
as the figure below, in area
1. Keep normally operate
2. Feed-
in reactive current according to ΔU/Un and K factor
3. Short time disconnect
4. Long time disconnect
U/Un
I
B
/I
n
K factor
K factor
+10
-10
100%
U1
0
t1
t2
Fault occurence
t3
time
U
grid/
U
nom
2
3
4
1
U2
Udrop
Figure 6-5 FRT characteristic
