Operation Manual

MI 2092 Power Harmonics Analyser Section VI Theory of operation
53
Total 3j Values (averaged at the end of an IP)
Watts
()
aP
P
pn
t
t
j
j
n
+
+
=
=
å
1
()
aP
P
pn
t
t
j
j
n
-
-
=
=
å
1
VAr
(
)
aQ
Q
pn
ti
ti
j
j
n
+
+
=
=
å
1
(
)
aQ
Q
pn
tc
tc
j
j
n
+
+
=
=
å
1
VAr
(
)
aQ
Q
pn
ti
ti
j
j
n
-
-
=
=
å
1
(
)
aQ
Q
pn
tc
tc
j
j
n
-
-
=
=
å
1
VA
()
(
)
aSaPaQaQ
ttitc
t
++++
=++
2
2
()
(
)
aSaPaQaQ
ttitc
t
----
=++
2
2
PF
() ()
aPf
aP
aQaP
ti
t
ti
t
+
+
++
=
+
2
2
() ()
aPf
aP
aQaP
tc
tc
t
t
+
+
++
=
+
2
2
PF
() ()
aPf
aP
aQaP
ti
t
ti
t
-
-
--
=
+
2
2
()
()
aPf
aP
aQaP
tc
tc
t
t
-
-
--
=
+
2
2
Current &
Frequency
aI
I
pn
j
j
n
0
0
1
=
=
å
aFreq
Freq
pn
j
j
n
=
=
å
1
Note: If power breaks occur, period ‘pn’ (for power calculations) is modified to:
pn
IP
ic
pb
ic
=-
Where: ic = input cycle time
pb = power break time inside the IP