Mv Station Functions; Operation Mode; Mode Change; Operation Mode Description - Sungrow SG2500U-MV System Manual

10

MV Station Functions

10.1

Operation Mode

10.1.1 Mode Change

After being energized, the MV Station switch among different modes as shown in the figure
below.
Stop
The MV Station is energized
All the grid-connected
requirements met
Initial
standby
MV Station restarts
Stop the MV Station via LCD panel
MV Station restarts
Turn the Start/Stop switch to "Stop" or push down
the Emergency stop button
Upv is the DC input voltage of the MV Station.
UpvStart is the MV Station DC side startup voltage.

10.1.2 Operation Mode Description

Stop
This is the initial state of the MV Station. The MV Station DC and AC switches are in the
"OFF" position; the upstream and downstream connections are disconnected. The MV
Station is therefore electricity-free.
Initial Standby
When the MV Station upstream and downstream connections are connected and the AC &
DC switches are in the "ON" position, the MV Station turns to the Initial Standby mode.
The MV Station will continuously check if the PV array and the grid meet the
grid-connection requirements. If the MV Station DC input voltage is higher than the MV
Station startup voltage and the startup time is reached, whilst the requirements of the grid
side parameter are satisfied, MV Station will turn from the Initial Standby mode into the
Startup mode.
66
Unrecoverable fault
Stop and repair the MV Station
Startup
Stop the MV Station via LCD panel
Key-stop
Fig. 10-1 Operation modes change
Fault
Fault cleared and
Fault
setting time reached
occurred
Idc ≈ 0A for 10 minutes
Run
Upv>UpvStart and setting
time reached
Alarm removed
Turn the Start/Stop switch to "Stop" or
push down the Emergency stop button
Emergency-
stop
Standby
Alarm Run