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TR-2100 User Manual
Power (fundamental)
Apparent
=
S V
f
Real
=
P V I
f
Reactive
=
Q V I
f
For delta VTs real power is computed using the two wattmeter method.
Displacement power factor
=
PF
Cos
Impedance (fundamental)
=
Z
V
f
Imbalance
=
I V V
m
Phasor Measurement
The TR-2100 acquisition system is organized so that a sample is taken at the second marker.
The computed absolute phase angle from a Discrete Fourier Transform (DFT), using a 1
cycle window starting with this sample, will yield the angle of the vector at the exact
second.
The synchrophasor output from the TR-2100 is compatible with IEEE 1344 - 1995. This
defines the absolute angle of the positive sequence voltage vector relative to a time standard.
A second of century time code is used to compare phase angles from different locations.
*
I
f
f
Φ
*
*
Cos
f
f
Φ
*
*
Sin
f
f
Φ
I
f
f
*
100
%
(Ratio of NPS to PPS)
−
+
1
1
76
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