Huawei SUN2000 Series User Manual page 78

SUN2000-(196KTL-H3, 200KTL-H3, 215KTL-H3)
Seires
User Manual
No. Parameter
3 LVRT gradient
K1
4 LVRT gradient
K2
5 Percentage of
LVRT reactive
current
limiting
6 Threshold of
LVRT zero-
current mode
7 LVRT mode
8 LVRT
characteristic
curve
9 HVRT
Issue 03 (2021-09-30)
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.
Sets LVRT mode. The options are Zero-current
mode, Constant current mode, Reactive
power priority mode, and Active power
priority mode.
Specifies the low voltage ride-through
capability of the inverter.
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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7 Man-Machine Interactions
Remarks
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