10.9.4.2
Check the activation of the voltage control operation
SEMOD175185-537 v9
1.
Confirm
Transformer Tap Control
=
On
and
Transformer Voltage Control
=
On
•
Direct tap change control
Main menu/Settings/IED Settings/Control/
TransformerTapChanger(YLTC,84)/TCMYLTC:x/TCLYLTC:x/
Operation
•
Automatic transformer voltage control
Main menu/Settings/IED Settings/Control/
TransformerVoltageControl(ATCC,90)/TR1ATCC:x/TR8ATCC:x/
General/Operation
•
Enable Tap Command
Main menu/Settings/IED Settings/Control/
TransformerTapChanger(YLTC,84)/TCMYLTC:x/TCLYLTC:x/
EnabTapCmd
While the test set is connected to the IED but no voltage is applied, the
voltage control functions will detect an undervoltage condition that may
result in an alarm or blocking of the voltage-control operation. These
conditions will be shown on the local HMI.
2.
Apply the corresponding voltage
Confirm the analog measuring mode prior to undertaking secondary injection
(positive sequence, phase-to-phase, or phase-to-earth). This measuring mode
is defined in the local HMI under
Main menu/Settings/IED Settings/
Control/TransformerVoltageControl(ATCC,90)/TR1ATCC:x/
TR8ATCC:x/General/MeasMode
The application of nominal voltage
USet
according to set
MeasMode
to the
IEDs should cause the alarm or blocking condition for undervoltage to reset.
10.9.4.3
Check the normal voltage regulation function
SEMOD175185-562 v6
1.
Review the settings for
UDeadband
(based on percentage of nominal bus
voltage) and calculate the upper (U2) and lower (U1) voltage regulation limits
for which a tap change command will be issued.
2.
Review the expected time for first (
t1
) and subsequent (
t2
) tap change
commands from the voltage control function on the local HMI under
Main
menu/Settings/IED Settings/Control/TransformerVoltageControl(ATCC,
90)/TR1ATCC:x/TR8ATCC:x/Time/t1 and t2l
3.
Lower the voltage 1% below U1 and wait for the issue of a Raise command
from the voltage control after the expiry of a constant or inverse time delay
set by
t1
. Detection of this command will involve locating the allocated
Section 10
1MRK 506 377-UEN C
Testing functionality by secondary injection
144
Railway application RER670 2.2 IEC
Commissioning manual
Summary of Contents for RELION RER670
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