No. Parameter Description Remarks
6 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.
7 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.
8 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.
9 LVRT mode Sets LVRT mode. The options are
Zero-current mode, Constant
current mode, Reactive power
priority mode, and Active power
priority mode.
10 LVRT characteristic
curve
Species the low voltage ride-
through capability of the device.
SUN2000-(100KTL, 110KTL, 115KTL)-M2
User Manual 7 Man-Machine Interactions
Issue 02 (2022-06-30) Copyright © Huawei Technologies Co., Ltd. 74
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