KBR multimess D9-PQ
20144 EDEBD
A0228-5023-1_EN
89
Active Power - P
The sign of the active power corresponds with the flow direction of the funda-
mental oscillation active energy (+: supply, - : consumer).
The values of the conductor - active power are calculated from the samples of a
synchronisation cycle.
2048
)
(
2048
1
12
/
10
∑
=
−
=
n
L
L
n
p
P
(200 ms values) with conductor index L = {1, 2, 3, E}
The 10 min values are calculated as linear averages.
The collective effective power is defined for 4-wire systems as
3
2
1
P
P
P
P
+
+
=
Σ
The collective effective power is defined for 3-wire systems as
E
P
P
P
P
P
+
+
+
=
Σ
3
2
1
Fundamental oscillation - active power (line):
{ }
G
G
S
P
Re
=
S
G
= Geometric fundamental oscillation apparent power
Symmetric Components
The complex symmetrical components are calculated from the corresponding
complex spectral components of the fundamental oscillations of the phase
voltages and phase currents.
Phase voltage in a 4-wire system = Phase-to-Neutral voltage
Phase voltage in a 3-wire system = Phase-to-Ground voltage
Measurement data – measurement methods