Solar Lattice

Function

Watt-power factor

ID
func:watt-power-factor
IRI
https://solarlattice.org/kb/func/watt-power-factor
Status
active
Also known as
cos phi(P), PF(P), Watt-PF, Cosphi(P), Watt/Cosphi, PF_of_P, Power Factor vs. Power
Category
Grid support
Function kind
grid-support

Watt-power factor, also called cos phi(P), sets the inverter's power factor as a function of its present active power output, so reactive power feed-in changes as output changes. The power factor is set according to a configured reference value, and the curve is drawn with active power on the horizontal axis and cos phi on the vertical axis. In SMA documentation the curve is set with the parameter PF_of_P: its active power points run from -100% to 100% of nominal apparent power and its power factor points from ±0.8 to 1.0. FIMER warns that these reactive power parameters should not be changed unless the grid operator asks for it.

<!-- review notes

Claims

setting_range

c1 drafted · lead -100–100 PERCENT

Conditions: Active power points (independent values) of the PF_of_P curve, as a percentage of nominal apparent power, in SMA documentation

c2 drafted · lead 0.8–1 UNITLESS

Conditions: Power factor points (dependent values) of the PF_of_P curve, settable from ±0.8 to 1.0, in SMA documentation

Referenced by

Data