Aggregation - AEMC PEL102 User Manual

Quantities
Cos φ
L
TAN Φ
Line-to-neutral voltage
harmonic distortion rate
THD_VL (%)
Line-to-line voltage
harmonic distortion rate
THD_Uab (%)
Current harmonic
distortion rate
THD_IL (%)
a.3 aggregation
Aggregated quantities are calculated for a defined period according to the following formulas based on 50/60 cycles.
Aggregation can be averaging or quadratic averaging, or other methods.
84
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Formula
Quantities
Line-to-neutral voltage (V )
L
(RMS)
Line-to-neutral voltage (V )
L
(DC)
Line-to-line voltage
(U )
ab
(RMS)
Current (I )
L
(RMS)
Current (I )
L
(DC)
Voltage crest factor
(CF )
VL
Current crest factor
(CF )
IL
Frequency (F)
Active Power
on source (P )
L
Active Power
on load (P )
L
Reactive Power
on source (Q )
L
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Cos φ [10/12] is the cosinus of the difference
between the phase of the fundamental of the
current I and the phase of the fundamental of
the line-to-neutral voltage V for 10/12 cycles
Q[10/12] and P[10/12] are the 10/12 periods
THD is calculated as % of fundamental
VH1 is the value of fundamental
THD is calculated as % of fundamental
UH1 is the value of fundamental
THD is calculated as % of fundamental
IH1 is the value of fundamental
Table 25
Formula
N − 1
1
∑
2
V agg V s
[ ] = × 1 [ ]
L L
x
N
x = 0
N − 1
1
∑
V [ agg ] = × V [ 200 ms
L Lx
N
x = 0
N − 1
1
∑
2
U [ agg ] U 1 [ s
= ×
ab abx
N
x
= 0
ab = 12, 23 or 31
N
− 1
1
∑
2
I [ agg ] = × I 1 [
L Lx
N
x = 0
N − 1
1
∑
I [ agg ] = × I [ 200 ms
L
Lx
N
x = 0
N
1
∑
CF [ agg ] = × CF [ ] 1 s
VL VL
N
1
N
1
∑
CF [ agg ] = × CF 1 [ s ]
IL IL
N
1
N − 1
1
∑
F [ agg ] = × F 1 [ s ]
x
N
x = 0
N − 1
1
∑
P [ agg ] = × P 1 [ s
SL SLx
N
x
= 0
N − 1
1
∑
P [ agg ] = × P 1 [
SL SLx
N
x = 0
N − 1
1
∑
Q [ agg ] = × Q 1 [
SL SLx
N
x = 0
Power & Energy Logger Model PEL 102 and PEL 103
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Comments
values
value for Q and P.
]
]
s ]
]
]
s ]
s ]
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