Huawei SUN 2000 Series User Manual page 55

SUN2000-4.95KTL-JPL0
User Manual
Alarm ID Alarm
Name
2037 Grid
Underfreq
uency
2038 Unstable
Grid
Frequency
2039 Output
Overcurre
nt
2040 Output DC
Componen
t Overhigh
Issue 03 (2020-06-03)
Alarm Cause
Severity
Major Cause ID = 1
Power grid exception: The
actual power grid frequency is
lower than the standard
requirement for the local
power grid.
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 power grid voltage drops
dramatically or the power grid
is short-circuited. As a result,
the solar inverter transient
output current exceeds the
upper threshold and therefore
the solar inverter protection is
triggered.
Major Cause ID = 1
The DC component of the
solar inverter output current
exceeds the specified upper
threshold.
Copyright © Huawei Technologies Co., Ltd.
7 System Maintenance
Suggestions
1. If the alarm occurs occasionally,
the power grid may be abnormal
temporarily. The solar inverter
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm occurs frequently,
check whether the power grid
frequency is within the
acceptable range. If no, contact
the local power operator. If yes,
log in to the SmartLogger, or
NMS to modify the power grid
underfrequency protection
threshold with the consent of the
local power operator.
1. If the alarm occurs occasionally,
the power grid may be abnormal
temporarily. The solar inverter
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm occurs frequently,
check whether the power grid
frequency is within the
acceptable range. If no, contact
the local power operator.
1. The solar inverter detects its
external working conditions in
real time. After the fault is
rectified, the solar inverter
automatically recovers.
2. If the alarm occurs frequently and
affects the energy yield of the
power plant, check whether the
output is short-circuited. If the
fault persists, contact your dealer
or Huawei technical support.
1. The solar inverter detects its
external working conditions in
real time. After the fault is
rectified, the solar inverter
automatically recovers.
2. If the alarm occurs frequently,
contact your dealer or Huawei
technical support.
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