Huawei SUN2000 User Manual page 152

SUN2000-(3.8KTL-11.4KTL)-USL0
User Manual
Alarm Alarm
ID Name
2035 Unbalance
d Grid
Voltage
2036 Grid
Overfreque
ncy
Issue 01 (2018-05-21)
Alarm Alarm
Severity Action
Major Shutdown,
alarm
reporting, and
automatic
recovery after
the fault is
rectified
Major Shutdown,
alarm
reporting, and
automatic
recovery after
the fault is
rectified
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Possible Cause
The difference between
grid phase voltages
exceeds the upper
threshold.
Cause ID = 1
Power grid exception:
The actual grid
frequency is higher than
the local power grid
standard.
8 System Maintenance
Suggestion
1. Check that the grid
voltage is within the
normal range.
2. Check the connection of
the AC output power
cable.
3. If the cable is connected
properly but the alarm is
triggered frequently and
affects the power
production of the PV
plant, contact the local
power operator.
1. If the alarm is triggered
accidentally, it may be
due to temporary
abnormalities in the
power grid. The
SUN2000 will
automatically recover
after the power grid has
resumed normal
functioning.
2. If the alarm is triggered
frequently, check
whether the grid
frequency is within the
acceptable range. If it is
not, contact the local
power operator. If grid
frequency is within the
acceptable range,
modify the grid
overfrequency
protection threshold
with the consent of the
local power operator.
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