Hioki 9605-01, Инструкция по эксплуатации, Страница: 84 / 100

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Process
Items
The kth-order harmonic
Total value up to
Kth-order harmonic
Voltage
U [Ｖrms]
U
k
{(
U
kr
)
2
+ (
U
ki
)
2
} U
K
Σ(
U
k
)
2
K
K=2
Voltage phase angle
θU [
。
] θ
U
k
tan
-1
U
kr
-
U
ki
── ──
Current
Ｉ [Arms]
Ｉ
k
{(
I
kr
)
2
+ (
I
ki
)
2
} Ｉ
K
K
K=2
Σ(
I
k
)
2
Current phase angle
θＩ [
。
] θ
U I
k
tan
-1
I
kr
-I
ki
── ──
Active power
P [W]
P
k
U
kr
×
Ｉ
kr+
U
ki
× Ｉ
ki
P
K
K
K=2
Σ P
k
Phase difference
between voltage and
current
θU
Ｉ
[
。
] θ
I
k θ
(i)k
=θ
(i)
U
k
-θ
(i)
U
k
── ──
Harmonic voltage
percentage
HD
U
[%] HD
U
k
U
k
U
1
×100
── ──
Harmonic current
percentage
HD
Ｉ
[%] HD
I
k
I
k
I
1
×100
Harmonic power
percentage
HD
P
[%] HD
Pk
P
k
P
1
×100
Total harmonic
voltage distortion ratio
THD
UF
[%]
── ──
THD
UF
k
k=2
Σ(
U
k
)
2
U
I
×100
Total harmonic
current distortion ratio
THD
IF
[%] THD
IF
k
k=2
Σ(
I
k
)
2
I
I
×100
Total harmonic
voltage distortion ratio
THD
UR
[%]
── ──
THD
UR
k
k=2
Σ( U
k
)
2
U
×100
Total harmonic
current distortion ratio
THD
IR
[%] THD
IR
k
k=2
Σ(
I
k
)
2
I
×100
Note 1: (i), (i+1), and (i+2) are the measurement channel numbers.
Note 2: The subscript "k" on U, I, and P indicates the harmonic number, so for example "U
1
" is the
fundamental component of voltage. A "K" indicates the total harmonic analyzed.
Note 3: The subscripts "r" and "i" on Uk and Ik indicate the real and imaginary components of the results
of FFT analysis.
Note 4: The harmonic voltage phase angle and harmonic current phase angle are corrected and displayed
taking the PLL source forming the phase reference as 0
。
. A positive sign indicates the phase
leading, and a negative sign the phase lagging. (Figure 1 on the next page)
Note 5: The harmonic voltage-current phase difference indicates the difference between the harmonic
voltage phase angle and the harmonic current phase angle for the same harmonic. (Figure 2 on the
next page)
(6) Harmonic Basic Calculation Formulas