Secondary Test; Check The Activation Of The Voltage Control Operation - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
Terminology
The busbar voltage U
where Uij is the phase-phase voltage, Uij = Ui -Uj, or Ui, where Ui is one single-phase-to-earth
voltage.
I is a shorter notation for the measured load current; it is to be used instead of the three-
L
phase quantities IL1, IL2, IL3 or the two-phase quantities Ii and Ij, or single-phase current Ii.
For cases where single-mode voltage control is implemented, the Parameter Setting menu
structure includes TR1ATCC:1 instead of the parallel designator TR8ATCC:1.
11.9.4.1

Secondary test

The voltage control function performs basic voltage regulation by comparing a calculated load
voltage (U
limits U2 and U1 respectively). The calculated load voltage U
transformer bus voltage U
settings.
When the load voltage U
If U < U1 or U
L
defined by setting
stays outside the inner deadband (defined by setting
If U remains outside of the voltage range defined by
L
expires, the voltage control will execute a raise or lower command to the transformer tap
changer. This command sequence will be repeated until U
deadband range.
11.9.4.2

Check the activation of the voltage control operation

1. Confirm
•
Main menu/Settings/IED Settings/Control/TransformerTapChanger(YLTC,84)/
TCMYLTC:x/TCLYLTC:x/Operation
•
Main menu/Settings/IED Settings/Control/TransformerVoltageControl(ATCC,90)/
TR1ATCC:x/TR8ATCC:x/General/Operation
•
156
is a shorter notation for the measured voltages UL1, UL2, UL3 or Uij,
B
Also note that for simplicity, the Parameter Setting menu structures included in
the following procedure are referred to universally as VCP1, for example, Main
menu/Settings/IED Settings/Control/
TransformerVoltageControl(ATCC,90)/TR1ATCC:x/TR8ATCC:x/Time/t1 and
t2l.
) against a voltage range defined by setting
L
adjusted for Load drop compensation (LDC) where enabled in
B
Note that when LDC is disabled, U
stays within the interval between U1 and U2, no action will be taken.
L
> U2, a command timer will start, which is constant time or inverse time
L
t1 and t1Use . The command timer will operate while the measured voltage
Transformer Tap Control = On and Transformer Voltage Control = On
Direct tap change control
Automatic transformer voltage control
Enable Tap Command
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UDeadband (with upper and lower
represents the secondary
L
equals U .
B L
UDeadbandInner ).
UDeadband and the command timer
is brought back within the inner
L
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SEMOD175185-145 v5
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Bay control REC670
Commissioning manual