Huawei SUN2000L Series User Manual page 127

SUN2000L-(4.125KTL, 4.95KTL)-JP
User Manual
Alarm
Alarm ID
Name
2036 Grid
Overfrequ
ency
2037 Grid
Underfreq
uency
2038 Unstable
Grid
Frequency
2039 Output
Overcurre
nt
Issue 03 (2018-04-11)
Alarm
Possible Cause
Severity
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.
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.
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8 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
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 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
no, contact the local power
operator. If yes, 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
no, 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 dealer.
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