UNIFREM v.3.41x
10 May 2017
Page 101 from 180
Name [ID]
Description
Def.
[208]
For example: on the load that consumes energy the minimum power criteria is
selected; on the generators maximum or power factor of the produced power.
Signal min.
Optimization to the minimal value of a selected signal Opt. signal [80] (page 100).
Signal max. Optimization to the maximum value of a selected signal Opt. signal [80] (page 100).
delta signal
[255]
Difference between the found global extremum and the optimized quantity, when
the optimization is restarted.
-
-
÷
-
Global extremum can be overwritten with a new value after the initial scan, if a new value is
found that matches the optimization criteria better. If the algorithm moves away from the found
global extremum more that it is set in this parameter, an optimization restart will be generated,
or eventually a new scan.
Opt. period
[13]
Minimum time between two optimization steps.
2,0 s
0,1
s
÷
3000,0 s
Time needed to fulfil the measurement condition is added to this time, the condition can be
ramp settling or any other event selected by the parameter Opt. meas. signal [279] (page
102).
Scanning
[420]
Full output range scan mode. After START command or optimization reset,
converter scans the full range of output OPT Output [423] (page 22) in the
direction set by Start. direction [426] (page 101) in order to find new global
extremum. Scanning is needed in systems where there are several local extrems
and the highest one has to be found.
Scan is a gradual search of the whole output range and finding the area of the
global extremum. Scan step is 5% of the output signal.
Turned off
Turned off
Scanning is turned off.
Turned on
Scanning is turned on.
Step mode
[425]
Setting the mode of optimization step calculation during the fine tuning. After
starting the converter and scanning the fine optimization starts, slowly changes
the output OPT Output [423] (page 22) by small fluctuations of preset step
Optimization step [742] (page 22) to maintain the global extremum.
Method of calculating the optimization step during the soft adjustment of the
extremum.
Fixed
Fixed
Search with a constant output signal step, which is set by the parameter Min. step [427] (page
101).
Variable
Search with a variable output signal step that is increased proportionally to the derivation of
the optimized signal from the value Min. step [427] (page 101) to 5% of the output range and
proportionally to the gain Adapt. step gain [743] (page 101).
Adapt. step
gain [743]
Gain of the optimization adaptivity step algorithm from the optimized signal
derivative value.
0,800
0,001
÷
100,000
Only applies to the variable optimization step in Step mode [425] (page 101).
Min.
step
[427]
Minimal optimization step.
0,001
0,001 ÷ 0,050
Optimization step is the difference between two consecutive optimization output samples.
Start.
direction
[426]
Direction of the first search.
Depending on the technology and specific deployment, is is suitable to search
from up to bottom or vice versa. Initial direction is also applied during the Scan
process, if turned on.
From
minimum
From
minimum
Optimization begins from the minimal output value.
From
maximum
Optimization begins from the maximal output value.
Opt.
reset
signal [263]
Signal defining the condition of optimization reset.
-
Signal
This signal is used as an optimization operation condition. Is usually set as a special
combination of bits (flags) of the status or control word.
Opt.
reset
[273]
Conditions for optimization Reset.
-
-
÷
-
Opt.
reset
Optimization reset deactivation: In case of a numeric signal if the signal value is -
