Huawei SUN2000 Series User Manual page 65

SUN2000-(20KTL, 29.9KTL, 30KTL, 36KTL, 40KTL)-
M3
User Manual
ID Name
2035 Grid
volt.
Imbalan
ce
2036 Grid
overfreq
uency
Issue 01 (2020-10-15)
Severity Cause
Major Cause ID = 1
The difference between
power grid phase voltages
exceeds the upper
threshold.
Major Cause ID = 1
Power grid exception: The
actual power grid
frequency is higher than
the requirements for the
local power grid code.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Solution
● If the alarm occurs
occasionally, the power grid
may be abnormal
temporarily. The inverter
automatically recovers after
detecting that the power grid
becomes normal.
● If the alarm persists, check
whether the power grid
voltage is within the
acceptable range. If not,
contact the local power
operator.
● If the alarm lasts for a long
time, check the AC output
power cable connection.
● If the AC output power cable
is correctly connected, yet the
alarm persists and affects the
energy yield of the PV plant,
contact the local power
operator.
● If the alarm occurs
occasionally, the power grid
may be abnormal
temporarily. The inverter
automatically recovers after
detecting that the power grid
becomes normal.
● If the alarm persists, check
whether the power grid
frequency is within the
acceptable range. If not,
contact the local power
operator. If yes, modify the
grid overfrequency protection
threshold through the app,
SmartLogger, or NMS with
the consent of the local
power operator.
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