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Quantities Formula Comments
AC reactive energy in quadrant
3 (EQ3)
( )
×= 1
3
3
x
q
TQ
QE
AC reactive energy in quadrant
4 (EQ4)
( )
×= 1
4
4
x
q
TQ
QE
AC consumed apparent energy
(ES+)
+
+
=
x
TS
SE
AC generated apparent energy
(ES-)
=
x
TS
SE
DC consumed energy (EPdc+)
+
+
=
x
TdcP
PE
dc
DC consumed energy (EPdc-)
( )
×= 1
x
TdcP
PE
dc
Phase-to-neutral voltage harmonic
distortion rate THD_VL (%)
THD is calculated as % of fundamental
VH1 is the value of the fundamental
Phase-to-phase voltage harmonic
distortion level THD_Uab (%)
THD is calculated as % of fundamental
UH1 is the value of the fundamental
Current harmonic distortion level
THD_IL (%)
THD is calculated as % of fundamental
IH1 is the value of the fundamental
Table 29
8.3. AGGREGATION

may be calculated by arithmetic or quadratic averaging, or other methods.
Quantities Formula
Phase-to-neutral voltage (VL)
(RMS)
]1[
1
][
1
0
2
sV
N
aggV
N
x
x
LL
=
×=
Phase-to-neutral voltage (VL)
(DC)
=
×=
1
0
]200[
1
]agg[
N
x
Lx
L
msV
N
V
Phase-to-phase voltage (Uab)
(RMS)
=
×=
1
0
2
]1[
1
]agg[
N
x
abxab
sU
N
U
ab = 12, 23 or 31
Current (IL)
(RMS)
=
×=
1
0
2
]1[
1
][
N
x
LxL
sI
N
aggI
Current (IL)
(DC)
=
×=
1
0
]200[
1
]agg[
N
x
Lx
L
msI
N
I
Voltage crest factor (CFVL)
×=
N
VLVL
sCF
N
aggCF
1
]1[
1
][
Current crest factor (CFIL)
×=
N
ILIL
sCF
N
aggCF
1
]1[
1
][
Unbalance (u2)
×=
N
su
N
aggu
1
22
]1[
1
][
72


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