Huawei SUN2000-50KTL-JPM0 User Manual page 100

SUN2000-(50KTL-JPM0, 50KTL-JPM1, 63KTL-JPM0)
User Manual
Alarm Alarm Alarm
ID Name Severity
2033 Grid Major
Undervo
ltage
2034 Grid Major
Overvol
tage
Grid
2035 Major
Voltage
Imbalan
ce
Issue 01 (2018-09-30)
Cause
The grid voltage is below the lower
threshold or the low voltage duration
has lasted for more than the value
specified by LVRT.
The grid voltage exceeds the higher
threshold or the high voltage duration
has lasted for more than the value
specified by HVRT.
The difference between grid phase
voltages exceeds the upper threshold.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Measures
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 power grid
voltage is within the acceptable
range. If no, contact the local
power operator. If yes, modify
the power grid undervoltage
protection threshold with the
consent of the local power
operator.
3. If the fault persists for a long
time, check the AC circuit
breaker and AC output power
cable.
1. Check whether the grid
connection voltage exceeds the
upper threshold. If yes, contact
the local power operator.
2. If you have confirmed that the
grid connection voltage
exceeds the upper threshold
and obtained the consent of the
local power operator, modify
the overvoltage protection
threshold.
3. Check that the peak grid
voltage does not exceed the
upper threshold.
1. Check that the grid voltage is
within the normal range.
2. Check the connection of the
AC output power cable. If the
cable connection is proper but
the alarm occurs frequently
and affects the power
production of the PV plant,
contact the local power
operator.
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