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SUN2000-(125KTL-M5, 200KTL-H4, 250KTL-H0,
286KTL-H0)
User Manual
No.
Parameter
14
LVRT gradient K1
15
LVRT gradient K2
16
Percentage of LVRT
reactive current
limiting
17
Threshold of LVRT
zero-current mode
Issue 04 (2023-09-22)
Setting Description
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.
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.
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.
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.
Copyright © Huawei Technologies Co., Ltd.
7 Power-On and Commissioning
Remarks
70
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