Potential Operating Range Of The Inverter In Conjunction With Reactive Power; Overview Of Reactive Power Control Options - Fronius Galvo Serviceanleitung

Potential operat- Reactive power mode is restricted by the maximum output current (maximum apparent
ing range of the power) as well as by the operational reactive power limits of the inverter:
inverter in con- -
junction with re- -
active power
The figure below shows the potential operating range of the inverter. All valid operating
points defined by effective power P and reactive power Q are within the grey area.
Q = reactive power [VAr]
P = effective power [W]
S
Example for Fronius Galvo
For example, fixed values or curves can be specified within the operating range that define
the reactive power response of the inverter.
Overview of reac- The following options for switching reactive power and for controlling the inverter are avail-
tive power control able:
options -
-
-
-
-
-
Only one control option can be used at any one time to control the inverter.
Fronius Galvo cos phi = 0.85, Q
Fronius Symo cos phi = 0.7, Q
under-excited (inductive)
cos φ = -0,85
Q
rel
= nominal apparent power [VA]
n
Const. Cos φ
Const. Q Rel
Const. Q Abs
Ch Cos φ(P)
Ch Q (U)
Ch Q (P)
= 53 %
rel
= 71 %
rel
P
= -53 % Q
over-excited (capacitive)
cos φ = +0,85
Q
= +53 %
rel
71