OL5ATCC includes the line drop compensation (LDC) functionality, and the load
decrease is possible with a dynamic voltage reduction. Further, OL5ATCC can
manage voltage regulation in case of reverse power flow.
Either definite time characteristic ( DT) or inverse time characteristic ( IDMT) is
selectable for delays between the raising and lowering operations.
The function contains a blocking functionality. It is possible to block the voltage
control operations with an external signal or with the supervision functionality of
the function.
9.10.4 Analog channel configuration
Function block OL5ATCC has four analog group inputs which all must be properly
configured. The table below presents inputs and their purpose.
Table 1569: Analog inputs
Input Purpose
I3P1 Three-phase currents from transformer secondary side.
U3P1 Three-phase voltages from transformer secondary side.
I3P2
1
Three-phase currents from transformer primary side.
U3P2
1
Three-phase voltages from transformer primary side.
Please refer to Preprocessing function block section in this manual for
possible signal sources.
There are few special conditions which must be noted with configuration. See
Table
1570
.
Table 1570: Special conditions
Condition Note
U3P1 or U3P2 connected to
real measurements
Function can work with one voltage connected to channel 1
or with two voltages connected to channels 2 and 3 or with
all three voltage channels connected.
Improper analog channel configuration causes validation error in
Application configuration tool. In such a case analog channels and certain
settings are not matching. For troubleshooting, check the given material
in this chapter. Configuration can be written to relay once the mismatch
is corrected.
9.10.5 Operation principle
The function can be enabled and disabled with the
Operation
setting. The
corresponding parameter values are "On" and "Off".
The operation of OL5ATCC can be described with a module diagram. All the modules
in the diagram are explained in the next sections.
1
Should be connected to GRPOFF if HV side measurements are not available when “Regulation
mode” is “Forward” or “Bi-dir(calc)”
Control functions 1MRS759142 F
1696 REX640
Technical Manual
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