Fundamental And Symmetrical Components - Siemens SIPROTEC 5 Manual

Measured and Energy Values

9.4 Fundamental and Symmetrical Components

9.4 Fundamental and Symmetrical Components
The fundamental components are calculated from the frequency-tracked instantaneous values through a
Fourier filter (integration interval: one period). The results are phasor values that are described by way of the
amount and phase angle.
In accordance with the transformation matrix, the symmetrical components are calculated from the voltage
and current phasors. These are also phasor quantities.
Fundamental Components
Table 9-2
Values
V , V , V Phase-to-ground voltage
A B C
V Measured neutral-point displace-
N
ment voltage
V , V , Phase-to-phase voltage
12 23
V
31
I , I , I Phase currents
A B C
I Neutral-point phase current
N
Symmetrical Components
Table 9-3
Values
V Zero-sequence component of the
0
voltage
V Positive-sequence component of
1
the voltage
V Negative-sequence component of
2
the voltage
I Zero-sequence component of the
0
current
I Positive-sequence component of
1
the current
I Negative-sequence component of
2
the current
416
Fundamental Components
Primary
kV
kV
kV
A
A
Symmetrical Components
Primary
kV
kV
kV
A
A
A
Secon- Phase % Referenced to
dary Angle
V ° Rated operating voltage of primary
values/√3
V ° Rated operating voltage of primary
values/√3
V ° Rated operating voltage of the
primary values
A ° Rated operating current of the
primary values
A ° Rated operating current of the
primary values
Secon- Phase % Referenced to
dary Angle
V ° Rated operating voltage of primary
values/√3
V ° Rated operating voltage of primary
values/√3
V ° Rated operating voltage of primary
values/√3
A ° Rated operating current of the
primary values
A ° Rated operating current of the
primary values
A ° Rated operating current of the
primary values
C53000-G5040-C018-5, Edition 11.2017
SIPROTEC 5, Fault Recorder, Manual