Huawei SUN2000L User Manual page 71

SUN2000L-(2KTL-5KTL)
User Manual
Alarm Alarm Name
ID
2034 Grid
Overvoltage
2035 Unbalanced
Grid Voltage
2036 Grid
Overfrequency
Issue 06 (2020-03-19)
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.
Copyright © Huawei Technologies Co., Ltd.
7 System Maintenance
Suggestion
1. Check whether the grid
connection voltage exceeds the
upper threshold. If so, 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 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 not,
contact the local power
operator. If so, modify the grid
overfrequency protection
threshold with the consent of
the local power operator.
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