No. Parameter Description Remarks
3 LVRT gradient
K1
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 gradient K1 to 2,
the increment of 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 gradient
K2
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 gradient K2 to 2,
the increment of 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 congured in LVRT
mode is used.
7 LVRT mode Sets LVRT mode. The options are Zero-current
mode, Constant current mode, Reactive
power priority mode, and Active power
priority mode.
8 LVRT
characteristic
curve
Species the low voltage ride-through
capability of the inverter.
9 HVRT HVRT is short for high voltage ride-through.
When the grid voltage is abnormally high for a
short time, the inverter cannot disconnect from
the power grid immediately and has to work for
some time.
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SUN2000-(175KTL-H0, 185KTL-INH0, 185KTL-H1)
User Manual 7 Man-Machine Interactions
Issue 19 (2023-12-20) Copyright © Huawei Technologies Co., Ltd. 83
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