MI 2892 Power Master
Theory and internal operation
155
Nonfundamental power measurements are measured according to following equations:
Phase nonfundamental apparent power:
2
2
2
Hp
Vp
Ip
Np
S
D
D
S
[VA], p: 1,2,3
(25)
Phase current distortion power
Ip
fundP
Ip
THD
S
D
[VA], p: 1,2,3
(26)
Phase voltage distortion power:
Up
fundP
Vp
THD
S
D
[var], p: 1,2,3
(27)
Phase harmonic apparent power
Ip
Up
fundP
Hp
THD
THD
S
S
[var], p: 1,2,3
(28)
Phase active harmonic power:
fundP
p
Hp
P
P
P
[W], p: 1,2,3
(29)
Phase harmonic distortion power
2
2
Hp
Hp
Hp
P
S
D
[var], p: 1,2,3
(30)
Total nonfundamental power measurements
Standard compliance: IEEE STD 1459-2010
Total nonfundamental power quantities are calculated according to the following equations:
Total nonfundamental effective apparent power:
2
2
2
tot
tot
tot
tot
H
V
I
N
Se
De
De
Se
[VA]
(31)
Total effective current distortion power:
H
I
Ie
Ue
De
fund
tot
3
[var]
where:
2
2
fund
Ie
Ie
Ie
H
(32)
Total effective voltage distortion power:
fund
H
tot
Ie
Ue
De
V
3
[var]
where:
2
2
fund
Ue
Ue
Ue
H
(33)
Total effective apparent power:
H
H
tot
Ie
Ue
Se
H
[VA]
(34)
Total effective harmonic power:
3
2
1
H
H
H
H
P
P
P
P
tot
[W]
(35)
