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28
SME2-IS - Manual - 06 - 2021
FUNCTIONAL CHARACTERISTICS
• Moving average (I
L1ROL
, I
L2ROL
, I
L3ROL
, ±P
ROL
, ±Q
ROL
)
The arithmetic means, over a rolling time period N
ROL
∙t
ROL
, of the phase currents I
L1
, I
L2
, I
L3
, active
power ±P
and reactive power ±Q, acquired every second, are calculated, where t
ROL
is the length of
each subperiod, from 1 to 60 minutes, and N
ROL
is the number of subperiods, which can be set from
1 to 24, and the values updated at the end of the subinterval.
• Maximum (I
L1MAX
, I
L2MAX
, I
L3MAX
, ±P
MAX
, ±Q
MAX
)
The maximum values of the arithmetic means of the phase currents I
L1
, I
L2
, I
L3
, the active power ±P
and the reactive power ±Q,
acquired every second, are calculated over a period t
ROL
which can be
set from 1 to 60 minutes (this parameter is shared with the moving average) and updated at the end
of the period.
• Minimum (I
L1MIN
, I
L2MIN
, I
L3MIN
, ±P
MIN
, ±Q
MIN
)
The minimum values of the arithmetic means of the phase currents I
L1
, I
L2
, I
L3
, the active power ±P
and the reactive power ±Q,
acquired every second, are calculated over a period t
ROL
which can be
set from 1 to 60 minutes (this parameter is shared with the moving average) and updated at the end
of the period.
Rol-Demand.ai
Example of moving average with N
ROL
=4
I
L1RO L
I
L 2 ROL
I
L 3 RO L
±P
ROL
±P
±Q
(I
n
)
(P
n
)
(Q
n
)
±Q
ROL
II
L2
L2
I
L1
I
L3
0 1 2 3 4 5
1s
t
ROL
t
ROL
N
ROL
t
ROL
t
ROL
t
ROL
6
t
ROL
Average over period t
ROL
I
L x RO L
= I
Lxk
t
ROL
∙60
t
ROL
∙60
k=1
∑
N
ROL
n=1 n
∑
1
N
ROL
1
±P
ROL
= ±P
k
t
ROL
∙60
t
ROL
∙60
k=1
∑
N
ROL
n=1 n
∑
1
N
ROL
1
±Q
ROL
= ±Q
k
t
ROL
∙60
t
ROL
∙60
k=1
∑
N
ROL
n=1 n
∑
1
N
ROL
1
Maximum of averages over period tROL
Average over period tROL
1s
t
ROL
t
ROL
t
ROL
t
ROL
t
ROL
t
ROL
Min-Demand.ai
Minimum of averages over period
t
ROL
Average over period
t
ROL
Reset
I
L1MIN
I
L2MIN
I
L3MIN
±P
MIN
±P
±Q
(I
n
)
(P
n
)
(Q
n
)
±Q
MIN
I
L2
I
L1
I
L3
1s
t
ROL
t
ROL
t
ROL
t
ROL
t
ROL
t
ROL
MIN
I
LxMIN
= I
Lxn
t
ROL
∙60
t
ROL
∙60
n=1
∑
1
MIN
±P
MIN
= ±P
n
t
ROL
∙60
t
ROL
∙60
n=1
∑
1
MIN
±Q
MIN
= ±Q
n
t
ROL
∙60
t
ROL
∙60
n=1
∑
1
Fix-Demand.ai
1s
I
L1FIX
, I
L2FIX
,I
L3FIX
±P
FIX
t
FIX
±P
±Q
(I
n
)
(P
n
)
(Q
n
)
±Q
FIX
I
L2
I
L1
I
L3
I
LxFIX
I
Lxn
t
F I X
∙ 60
t
F I X
∙ 60
n=1
∑
1
±Q
FIX
= ±Q
n
t
F I X
∙ 60
t
F I X
∙ 60
n=1
∑
1
±P
FIX
= ±P
n
t
F I X
∙ 60
t
F I X
∙ 60
n=1
∑
1
t
FIX
t
FIX
t
FIX
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