Huawei SUN2000L2KTL User Manual page 84
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SUN2000L-(2KTL-5KTL)
User Manual
Alarm
Alarm Name
ID
2037
Grid
Underfrequency
2038
Unstable Grid
Frequency
2039
Output
Overcurrent
2040
Output DC
Component
Overhigh
Issue 05 (2019-06-06)
Alarm
Possible Cause
Severity
Major
Cause ID = 1
Power grid exception: The
actual grid frequency is
lower than the local power
grid standard.
Major
Cause ID = 1
Power grid exception: The
actual grid frequency change
rate does not comply with
the local power grid
standard.
Major
Cause ID = 1
The grid voltage drops
dramatically or the power
grid is short-circuited. As a
result, the inverter transient
output current exceeds the
upper threshold and
therefore the inverter
protection is triggered.
Major
Cause ID = 1
The DC component of the
SUN2000L output current
exceeds the specified upper
threshold.
Copyright © Huawei Technologies Co., Ltd.
7 System Maintenance
Suggestion
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
underfrequency protection
threshold with the consent of
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.
1. The SUN2000L monitors its
external working conditions in
real time. The SUN2000L
automatically recovers after
the fault is rectified.
2. If the alarm occurs frequently
and affects the power
production of the PV plant,
check whether the output is
short-circuited. If the fault
persists, contact your supplier
or Huawei technical support.
1. The SUN2000L monitors its
external working conditions in
real time. The SUN2000L
automatically recovers after
the fault is rectified.
2. If the alarm occurs frequently,
contact your supplier or
Huawei technical support.
78
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