KMB NOVAR 2600, Operating Manual

Page: 70 / 96

NOVAR 2600 Operating Manual
Three-phase active power: :
∑
P
=
P
1
+
P
2
+
P
3
Three-phase reactive power :
∑
Q = Q
1
+ Q
2
+ Q
3
Three-phase apparent power :
∑
S
=
S
1
+
S
2
+
S
3
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
+
Pfh
2
+
Pfh
3
Fundamental harmonic three-phase reactive power :
∑
Qfh
=
Qfh
1
+
Qfh
2
+
Qfh
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 Fig. 5.7.
Fig. 5.7: Identification of consumption- supply and the character of reactive power according to phase
difference
70
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