Huawei SUN2000-2KTL-L0 User Manual page 68

SUN2000-(2KTL-5KTL)-L0
User Manual
Alarm ID Alarm Name
2034 Grid
Overvoltage
2035 Unbalanced
Grid Voltage
2036 Grid
Overfrequency
2037 Grid
Underfrequency
Issue 01 (2018-08-30)
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.
Major Cause ID = 1
Power grid exception:
The actual grid
frequency is lower 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 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
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 SUN2000
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.
1. If the alarm occurs accidentally,
the power grid may be abnormal
temporarily. The SUN2000
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
underfrequency protection
threshold with the consent of the
local power operator.
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