Huawei SUN2000L User Manual page 72

SUN2000L-(2KTL-5KTL)
User Manual
Alarm Alarm Name
ID
2037 Grid
Underfrequenc
y
2038 Unstable Grid
Frequency
2039 Output
Overcurrent
Output DC
2040
Component
Overhigh
Issue 06 (2020-03-19)
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.
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