Huawei SUN2000-2KTL-L0 - A Grid Codes

SUN2000-(2KTL-5KTL)-L0
User Manual
7 System Maintenance
Issue 02 (2019-07-04)
Copyright © Huawei Technologies Co., Ltd.
70
Alarm
ID
Alarm
Name
Alarm
Severity
Possible Cause
Suggestion
2038
Unstable Grid
Frequency
Major
Cause ID = 1
Power grid exception: The
actual grid frequency
change rate does not
comply with the local
power grid standard.
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.
2039
Output
Overcurrent
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.
1. The SUN2000 monitors its
external working conditions in
real time. The SUN2000
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
dealer.
2040
Output DC
Component
Overhigh
Major
Cause ID = 1
The DC component of the
SUN2000 output current
exceeds the specified upper
threshold.
1. The SUN2000 monitors its
external working conditions in
real time. The SUN2000
automatically recovers after the
fault is rectified.
2. If the alarm occurs frequently,
contact your dealer.
2051
Abnormal
Residual
Current
Major
Cause ID = 1
The insulation impedance
of the input side to PE
decreases when the
SUN2000 is operating.
1. If the alarm occurs accidentally,
the external power cable may be
abnormal temporarily. The
SUN2000 automatically recovers
after the fault is rectified.
2. If the alarm occurs frequently or
persists, check that the
impedance between the PV string
and ground is not below the
lower threshold.