3 Grid Failure
SMA Solar Technology AG
Technical Information
7
STP60-SHP75-10-Parameter-TI-en-12
2.6.2
Reconnection Time
If a fault on the grid makes the inverter disconnect and the grid then afterwards stabilizes within the allowed voltage
and frequency ranges, then the inverter is allowed to reconnect to the grid with this time delay. The reconnection time
is usually shorter than the connection time, but it can also be the same time or longer than the connection time.
Parameter name
Setting range
Step size
T_RECON
0 s to 1800 s
0.01 s
2.6.3
Short Interruption Time
The short interruption time is the permissible time period after which the inverter must start the complete reconnection
procedure. If the grid fault is remedied in a shorter time period, the inverter can reconnect to the utility grid after the
reconnection time
T_RECON
.
Parameter name
Setting range
Step size
T_SHT_INT
0 s to 1800 s
0.01 s
2.6.4
Time to Alarm
Time to alarm is the period which the inverter must wait before generating an alarm event. This is to prevent the inverter
from generating alarm events all the time.
Parameter name
Setting range
Step size
T_ALARM
0 s to 1800 s
0.01 s
2.6.5
Voltage and Frequency Connection Limits
The minimum and maximum connection limits for voltage and frequency define the value range in which the inverter
can connect to the utility grid.
Parameter name
Setting range
Step size
UMIN_CON
UMIN1 to UNOM
0.1 V
UMAX_CON
UNOM to UMAX1
0.1 V
FMIN_CON
FMIN1 to FNOM
0.01 Hz
FMAX_CON
FNOM to FMAX1
0.01 Hz
2.6.6
Ramp-In
The ramp-in factor describes the ramp for the power up of the inverter. More details can be found in the settings for
grid management services under parameter
Connection/reconnection ramp rate
.
3
Grid Failure
3.1
Active Frequency Shift
The active frequency shift works in the way that if the grid becomes unstable for any reason, this function then helps to
push the grid even more of balance so that the inverter disconnects due to RoCoF or one of the regular disconnection
parameters.
Parameter name
Setting options
LOM_F_SHF_K0/_K1
on (1)
off (0)
Summary of Contents for SHP 75-10
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