KMB SMY 133, Руководство по эксплуатации

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where: k ................... index of the order of each harmonic
N .................. highest harmonic (63)
U
1 ,k
, I
1 ,k
....... k-th harmonic of voltage and current (1
st
phase)
∆ ϕ
1 ,k
............ angle between U
1 ,k
, I
1 ,k
(1
st
phase)
Apparent and Distortion power (per phase, three phase):
S
1
= U
1
×
I
1
, 3 S = S
1
+ S
2
+ S
3
D
1
=
q
S
2
1
− P
2
1
− Q
2
1
, 3 D =
p
3 S
2
− 3 P
2
− 3 Q
2
Power factor (per phase, three phase):
P F
1
=
|
P
1
|
S
1
, 3 P F =
|
3 P
|
3 S
3.3 Harmonic distortion of voltages and currents
is continuously evaluated by FFT up to 63rd harmonic. The calculation is performed by using a rectangular
window of each measurement cycle. Following parameters are evaluated from the harmonic analysis:
Fundamental (1
st
) harmonic of voltage and current:
U f h
1
, If h
1
The absolute angle of the fundamental harmonic voltage and current phasors:
ϕU
1
, ϕI
1
The angle between the corresponding phasors of the fundamental harmonic components of voltage and
current:
4 ϕ
1
The angle between a voltage and the corresponding current phasors of the i-th order:
4
ϕ
i
Total harmonic distortion of voltage and current (as defined in 61000-4-30):
T HDU =
q
P
40
i =2
U h
2
i
U h
1
× 100 , T HD R
U
=
pP
max
i
=2
U h
2
i
U
× 100 [%]
T HDI =
q
P
40
i =2
Ih
2
i
Ih
1
×
100 , T HD R
I
=
pP
max
i
=2
Ih
2
i
I
×
100 [%]
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