METREL MI 2893 - Classic Vector and Arithmetic Power Measurement

MI 2893 / MI 2892 / MI 2885 Measurement methods
186
Total effective current distortion power:
HI IeUeDe
fun dtot
 3
[var]
where:
22
fund
IeIeIeH 
(32)
Total effective voltage distortion power:
fundHtot
IeUeDeV  3
[var]
where:
22
fund
UeUeUeH 
(33)
Total effective apparent power:
HHtot
IeUeSe H 
[VA]
(34)
Total effective harmonic power:
321
HHHH PPPP
tot

[W]
where:
111 fund
PPPH 
,
222 fund
PPPH 
,
333 fund
PPPH 
(35)
Total effective distortion power
22
HHH PSeDe 
[var]
(36)
Harmonic pollution
100
tot
N
fund
tot
Se
Se
HP
[%]
where:
fundfundfund IeUeSe tot  3
(37)
Load unbalance


tot
fund
S
Su
LU
(38)
5.1.6 Classic Vector and Arithmetic Power measurement
Standard compliance: IEC 61557-12
See section 3.23.6 how to select Modern Power measurement method. Please note that instrument
record all measurement (Classic and Modern), regardless of selected method.
Instrument fully complies with classic Vector and Arithmetic power measurement defined in the latest
IEC 61557-12 standard (Annex A) and IEEE 1459 (Section 3.2.2.5 and 3.2.2.6). There is large number of
measurement equipment installed on various points on network where this measurement algorithms
are used for measurement and recording. In order to compare past measurement with current, use one
of classic Power measurement. The measurements for active, reactive, and apparent powers have
physical meaning as long as the current and voltage waveforms remained nearly sinusoidal. On figure
below, graphical interpretation of Vector and Arithmetic power measurements are shown.