Control/TransformerVoltageControl(ATCC,90)/TR1ATCC:x/
TR8ATCC:x/Time/t1 and t2l
.
For cases where single-mode voltage control is implemented, the Parameter Setting
menu structure includes TR1ATCC:1 instead of the parallel designator TR8ATCC:1.
10.9.4.1
Secondary test
The voltage control function performs basic voltage regulation by comparing a
calculated load voltage (U
L
) against a voltage range defined by setting
UDeadband
(with upper and lower limits U2 and U1 respectively). The calculated load voltage U
L
represents the secondary transformer bus voltage U
B
adjusted for Load drop
compensation (LDC) where enabled in settings.
Note that when LDC is disabled, U
B
equals U
L
.
When the load voltage U
L
stays within the interval between U1 and U2, no action will
be taken.
If U
L
< U1 or U
L
> U2, a command timer will start, which is constant time or inverse
time defined by setting
t1
and
t1Use
. The command timer will operate while the
measured voltage stays outside the inner deadband (defined by setting
UDeadbandInner
).
If U
L
remains outside of the voltage range defined by
UDeadband
and the command
timer expires, the voltage control will execute a raise or lower command to the
transformer tap changer. This command sequence will be repeated until U
L
is brought
back within the inner deadband range.
10.9.4.2
Check the activation of the voltage control operation
1.
Confirm
Transformer Tap Control
=
On
and
Transformer Voltage Control
=
On
•
Direct tap change control
Main menu/Settings/Setting Group N/Control/
TransformerTapChanger(YLTC,84)/TCMYLTC:x/TCLYLTC:x/
Operation
•
Automatic transformer voltage control
Main menu/Settings/Setting Group N/Control/
TransformerVoltageControl(ATCC,90)/TR1ATCC:x/TR8ATCC:x/
General/Operation
•
Enable Tap Command
Section 10
1MRK 511 360-UEN A
Testing functionality by secondary injection
158
Bay control REC670 2.1 IEC
Commissioning manual