Huawei SUN2000L User Manual page 135

SUN2000L-(2KTL-5KTL)
User Manual
Alarm
Alarm ID
Name
2034 Grid
Overvolta
ge
2035 Unbalance
d Grid
Voltage
2036 Grid
Overfrequ
ency
Issue 02 (2017-12-12)
Alarm
Possible Cause
Severity
Major Cause ID = 1
The grid voltage exceeds the
higher threshold or the high
voltage duration has lasted for
more than the value specified
by HVRT.
Major The difference between grid
phase voltages exceeds the
upper threshold.
Major Cause ID = 1
Power grid exception: The
actual grid frequency is higher
than the local power grid
standard.
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8 System Maintenance
Suggestion
1. Check whether the grid
connection voltage exceeds the
upper threshold. If yes, contact
the local power operator.
2. If you have confirmed that the
grid connection voltage exceeds
the upper threshold and obtained
the consent of the local power
operator, modify the overvoltage
and undervoltage protection
thresholds.
3. Check whether the peak grid
voltage exceeds the upper
threshold.
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 connection is proper
but the alarm occurs frequently
and affects the power production
of the PV plant, contact the local
power operator.
1. If the alarm occurs accidentally,
the power grid may be abnormal
temporarily. The SUN2000L
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm occurs frequently,
check whether the grid frequency
is within the acceptable range. If
no, contact the local power
operator. If yes, modify the grid
overfrequency protection
threshold with the consent of the
local power operator.
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