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Page 22
4.11
Reactive Power Settings
Note:
Reactive power can be used in
electrical energy supply networks to bolster
the level of voltage. As such, feed-in inverters
can contribute to statistical voltage stability.
Open menu <Settings for>.
1.
Select <Reactive Power Setting>.
2. Select control process > see basis and
following processes > <Cos-Phi Constant>,
<Cos-Phi(P)>, <Q Constant> or <Q(U)>.
3. Set <Settling time> for selected control
process.
Note:
A change in the reactive power may
be necessary to meet the requirements of
a first-order filter.
» Reactive power type defined.
Fig. 77.
Set Settling time
Fig. 78.
Select reactive power settings and
select after Settling time
Fig. 79.
Choose operating mode
Basics
There are four types of reactive power
control. Only one mode of operation can be
active at any given moment.
From the perspective of the grid, the inverter
behaves like a load in accordance with the
national standard. This means that the
inverter operates in quadrant II (under-
excited) or III (over-excited) as shown below.
Definition
Over-excited reactive power, also known as
capacitive reactive power or leading power
factor.
Under-excited reactive power, also known as
inductive reactive power or lagging power
factor.
Fig. 80.
Load reference arrow system
