Reactive Power - Fronius GEN24 Operating Instructions Manual

Battery SoC Limitation for Grid Support
Parameter
"Mode"
"Battery SoC
Lower Limit"
"Battery SoC
Upper Limit"
General - Active Power
Parameter
"Priority at Un-
derfrequency"

Reactive Power

The voltage in the national grid can be influenced by the controlled use of react-
ive power by the inverter. When using reactive power control, the effective power
generated at the same time is not affected or is only affected to a small extent.
IMPORTANT!
The exchange of reactive power (in addition to the feed-in of effective power) in-
creases the current by the factor 1/cos φ.
Largely regardless of the effective power and therefore regardless of the energy
yield, switching the reactive power can cause the voltage to both rise and to fall:
-
-
58
Range of val-
ues
Off
On
0 ‑ 100 %
0 ‑ 100 %
Range of val-
ues
Priority on
Manual Power
Limitation
Priority on
Frequency-de-
pendent Power
Limitation
In over-excited mode or capacitive mode, reactive power is supplied to the
national grid. This increases the mains voltage.
In under-excited mode or inductive mode, reactive power is taken from the
inverter. The mains voltage is lowered as a result.
Description
Deactivated SoC limitation
Activated SoC limitation
The battery is not further
discharged when the lower
limit is reached.
The battery is no longer
charged when the upper
limit is reached.
Description
With "Priority on Manual
Power Limitation" the
power is not increased
above the set limit in case
of underfrequency.
With "Priority on Fre-
quency-dependent Power
Limitation" the manual
power limitation is ignored
in case of underfrequency
and the output power is in-
creased depending on the
frequency. The prerequis-
ite is that sufficient energy
is available from the PV
generator or the battery.
Availability
Availability