KMB NOVAR 2600, Operating Manual

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NOVAR 2600 Operating Manual
Tab 4.1 : PFC Control Setup – Overview of Parameters
Parameter Setup Range Default
Setup
Comment
target PF (tariff 1) - 0.80 ÷ 0.80 (cos) 0.98 (cos)
Other available formats : „tan“, „φ“
control bandwidth (tariff 1) 0.000 ÷ 0.040 (cos) 0.010 (cos)
control time at
undercompensation-UC (tariff 1) 5 sec ÷ 20 min 3 min
No “L”: control time reduction by
squared proportion
“L”: linear control time reduction.
control time at
overcompensation-OC (tariff 1) 5 sec ÷ 20 min 30 sec
offset power (tariff 1) any 0
Value corresponds to U
NOM
specified; p displayed when offset
control set only.
tariff 2 control 0 / dig. input /
power / table 0
parameter set according No.1 ÷
5 for tariff 2
the same as
parameters 1 ÷ 5
-
Displayed when
tariff 2 control
set
only.
tariff 2 control power 0 ÷ 120 % P
NOM
0
Displayed when tariff 2 control set
to
power
only.
control strategy 3p+1p / 3p / 3*1p 3p+1p
choke control 0 / mixed /
non-mixed 0
choke control limit power factor - 0.80 ÷ 0.80 (cos) 1.0
Displayed when choke control set
to mixed only.
offset control 0 / 1 0
4.3.1.3 Control Time for Tariff 1/2
The values for tariff 1 and tariff 2 can be specified in the range from 5 seconds to 20 minutes. It can be
set different for undercompensation (marked as
UC ) and overcompensation ( OC ) cases.
The value specified determines the frequency of control interventions under the following conditions:
• instantaneous power factor is either more inductive than the value required –
undercompensated – or more capacitive – overcompensated
• the difference between reactive power instantaneous value in the power system and optimum
value, which corresponds to the target power factor setting (= control deviation,
ΔQfh ), is just
equal to the smallest output reactive power ( O
MIN
)
If the parameter value is set to say 3 minutes and the above mentioned conditions are met in the
power system, the controller calculates optimum compensation and carries out control intervention
every 3 minutes.
The time mentioned gets shorter in proportion to the instantaneous control deviation. If control time
without preceding character “L” is set, it gets shorter as square of control deviation over the smallest
output reactive power (
O
MIN
). If the control time with preceding character “L” is specified, it gets
shorter in proportion to this ratio (“ L ” = Linear, causes slower response to large deviations). Rising
control deviation can decrease this value to the minimum control time of 5 seconds.
On the contrary, if the
ΔQfh control deviation is smaller than the smallest output reactive power ( O
MIN
),
control time gets twice as long. If the control deviation falls further under half of the smallest capacitive
section current value (
O
MIN
), no control interventions take place.
The control time (or times ) flow and actual state can be checked on the control time bargraph(s) and
in the info folder of the data & status panel.
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