Parameters
No.
Parameter
Description
Remarks
1
LVRT
LVRT is short for low voltage ride-through.
When the grid voltage is abnormally low for a
short time, the inverter cannot disconnect from
the power grid immediately and has to work for
some time.
-
2
Threshold for
triggering
LVRT (V)
Specifies the threshold for triggering LVRT. The
threshold settings should meet the local grid
standard.
This parameter is
displayed when
LVRT
is set to
Enable
.
3
LVRT reactive
power
compensation
factor
During LVRT, the solar inverter needs to
generate positive-sequence reactive power to
support the power grid. This parameter is used
to set the positive-sequence reactive power
generated by the solar inverter.
For example, if you set
LVRT reactive power
compensation factor
to
2
, the positive-
sequence reactive current generated by the
solar inverter is 20% of the rated current when
the AC voltage decreases by 10% during LVRT.
4
LVRT
compensation
power factor
of reactive
power in
negative
sequence
During LVRT, the solar inverter needs to
generate negative-sequence reactive power to
support the power grid. This parameter is used
to set the negative-sequence reactive power
generated by the solar inverter.
For example, if you set
LVRT compensation
power factor of reactive power in negative
sequence
to
2
, the negative-sequence reactive
current generated by the solar inverter is 20%
of the rated current when the AC voltage
decreases by 10% during LVRT.
5
Percentage of
LVRT reactive
current
limiting
During LVRT, the solar inverter needs to limit
the reactive current.
For example, if you set
Percentage of LVRT
reactive current limiting
to
50
, the reactive
current upper limit of the solar inverter is 50%
of the rated current during LVRT.
6
Threshold of
LVRT zero-
current mode
When
Zero current due to power grid fault
is
enabled, if the power grid voltage is less than
the value of
Threshold of LVRT zero-current
mode
during LVRT, the zero current mode is
used. Otherwise, the mode configured in
LVRT
mode
is used.
SUN2000-(175KTL-H0, 185KTL-INH0, 185KTL-H1
User Manual
7 Man-Machine Interactions
Issue 05 (2020-08-30)
Copyright © Huawei Technologies Co., Ltd.
69