Sungrow SH3K6 - Regular Operational Frequency Range

User Manual 3 Function Description
19
(1) 25 % Pn/min for initial connection and 10 % Pn/min for reconnection.
(2) Not applicable for initial connection and 10 % Pn/min for reconnection.
(3) 30 s for initial connection and 300 s for reconnection.
3.2.3 Regular Operational Frequency Range
The inverter can operate within its frequency range for at least the specified
observation time. The setting of conditions depends on whether the connection
is due to a normal operational start-up or an automatic reconnection after
tripping of the interface protection.
When the frequency level is outside the operational levels, the inverter will
disconnect from the grid. If a disturbance lasts less than the required protection
time, the inverter can reconnect to the grid once the frequency level goes back
to normal levels after the disturbance.
Grid frequency, Hz
F1 F2 FmaxFmin Fn
Normal operation
Start-up
Standby
Standby
F3 F4Fn
Reconnection
Standby Standby
Grid frequency, Hz
Condition 1: initial start-up Condition 2: reconnection after protection
FmaxFmin
Normal operation
Fig. 3-4 Inverter Action related to Grid Frequency (“DE” for example)
Tab. 3-3 Operational Frequency Parameter Description
Parameter
Description
Grid-connection
F1
Lower frequency limit for initial start-up
F2
Upper frequency limit for initial start-up
F3
Lower frequency limit for reconnection
F4
Upper frequency limit for reconnection
t
f
Minimum observation time
k
f
Connection gradient
Protection
F
min
Under-frequency protection value
F
max
Over-frequency protection value
T
min
Under-frequency protection time
T
max
Over-frequency protection time
Tab. 3-4 Default Values of Operational Frequency Parameter
Parameter
DE
BE
LUX
NL
IT (1)
IT (0)
F1 (Hz)
47.50
47.50
47.50
48.00
49.90
49.90