NOVAR 2100/2200 Operating Manual
Three-phase power factor :
∑
PF
=
|
∑
P
|
∑
S
Fundamental harmonic component quantities :
Fundamental harmonic power factor :
(or
, Δφ
1 ,
optionally)
Fundamental harmonic active power :
Pfh
1
=
Ufh
1
∗
Ifh
1
∗
cosΔφ
1
Fundamental harmonic reactive power :
Qfh
1
=
Ufh
1
∗
Ifh
1
∗
sinΔφ
1
Fundamental harmonic three-phase active power :
∑
Pfh
=
Pfh
1
∗
3
Fundamental harmonic three-phase reactive power :
∑
Qfh
=
Qfh
1
∗
3
Fundamental harmonic three-phase power factor :
∑
cosΔφ
=
cos
(
arctg
(
∑
Qfh
∑
Pfh
))
Powers and power factors of the fundamental harmonic component (cos φ) are evaluated in 4
quadrants in compliance with the standard IEC 62053 – 23, apendix C, see figure below.
Identification of consumption- supply and the character of reactive power according to phase
difference
For outright specification of the quadrant, the power factor of the fundamental harmonic component –
cos φ
– is expressed according to the graph with two attributes :
•
a sign
(
+
or
-
), which indicates polarity of active power
•
a character
( or ), which indicates the power factor character ( the polarity of reactive
power relative to the active power )
All of angle values are expressed in degrees in range [ -180.0 ÷ +179.9 ].
58
Ir+
Ia+
S
Q
P
Ir-
Ia-
quadrant I
active power import
reactive power import
power factor inductive (L) character
quadrant II
active power export
reactive power import
power factor capacitive (C) character
quadrant IV
active power import
reactive power export
power factor capacitive (C) character
quadrant III
active power export
reactive power export
power factor inductive (L) character
