Huawei SUN2000-196KTL-H0 User Manual page 72

SUN2000-(196KTL-H0, 200KTL-H2, 215KTL-H0)
User Manual
Parameters
No. Parameter
1 LVRT
2 Threshold for
triggering
LVRT (V)
3 LVRT reactive
power
compensation
factor
4 LVRT
compensation
power factor
of reactive
power in
negative
sequence
5 Percentage of
LVRT reactive
current
limiting
6 Threshold of
LVRT zero-
current mode
Issue 02 (2020-10-30)
Description
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.
Specifies the threshold for triggering LVRT. The
threshold settings should meet the local grid
standard.
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.
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.
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.
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7 Man-Machine Interactions
Remarks
-
This parameter is
displayed when LVRT
is set to Enable.
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