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94 PEM735_D00084_02_M_XXEN/06.2020
Explanation of power factor λ conventions:
Fig. 15.9: Explanation of power factor λ conventions
" IEEE " is the same as " –IEEE " but with the opposite sign.
Explanation of apparent power calculation
Quadrant 3
Power factor (-)
Active power export (-)
Reactive power export (-)
Quadrant 4
Power factor (+)
Active power import (+)
Reactive power export (-)
Quadrant 1
Power factor (+)
Active power import (+)
Reactive power import (+)
Quadrant 2
Power factor (-)
Active power export (-)
Reactive power import (+)
IEC
Reactive power import
Active power import
Quadrant 3
Power factor (-)
Active power export (-)
Reactive power export (-)
Quadrant 4
Power factor (+)
Active power import (+)
Reactive power export (-)
Quadrant 1
Power factor (-)
Active power export (+)
Reactive power import (+)
Quadrant 2
Power factor (+)
Active power export (-)
Reactive power import (+)
IEEE
Reactive power import
Active power import
S
ges
=
P
ges
2
+
Q
ges
2
Vector m ethod V: Scalar m ethod S:
S
ges
=
S
L1
+
S
L2
+
S
L3