NOVAR 2100/2200 Operating Manual
•
the left figure :
Σcos φ
= 0.98 inductive (choke symbol displayed). Furthermore, active three
phase power is being negative, therefore the leading “minus”-sign ( and the
symbol
displayed )
•
the middle figure :
Σtan φ
= 0.20 inductive. Active three phase power is positive.
•
the right figure :
Σφ
= 8 degrees inductive. Active three phase power is positive.
The arrows indicate control deviation – see the next chapter.
4.2.5 Deviation Flag
When any of actual data displayed, the control deviation (
ΣΔQfh
) fag can appear in the front of the
value. This flag shows the magnitude of deviation of the instantaneous reactive power in the power
system from tolerable reactive power range defined by the specified value of required power factor
and control bandwidth.
If the deviation is smaller than a half of the reactive power value of the smallest output, the flag is
suppressed (balanced state). If the deviation is greater than a half of, but smaller than the reactive
power value of the smallest output, the corresponding flag flashes — if lagging (undercompensation,
positive ΣΔQfh value ), the
▼
-flag flashes; if leading (overcompensation, negative ΣΔQfh value ), the
▲
-flag flashes. If the deviation exceeds the value of the smallest output, the corresponding flag is
shown permanently.
The control deviation flag is not displayed when :
•
a control deviation is such low that it does not exceed the power factor control range ( =
balanced state, see further below)
•
a control deviation cannot be evaluated due to voltage or current too low or no step power set
( then, if the controller was in the control mode it goes to the standby mode -see below for
details)
•
average values ( Avg/AvgMax/AvgMin ) are displayed, because the
▲
and
▼
symbols are
used for the value identification
•
parameters are displayed
4.2.6 THDs, CHL and Harmonics
You can check actual values of both voltage and current THDs and harmonic components in
appropriate rows (see
the Measured Data Navigation Chart
).
When you scroll to one of this rows, THD values of all measured phases are displayed as default.
Identifiers
THD
-
V
-
LN
or
THD
-
A
indicate phase voltage or current THD values, respectively.
In the voltage THD row ,you can furthermore check the CHL values, marked with appropriate
identifiers.
All of these values are expressed in percent and their averages and
AvgMax
/
AvgMin
values are
available too.
25
Fig. 4.3 :
Fundamental Harmonic Power Factor
Formats
