Check The Normal Voltage Regulation Function; Check The Undervoltage Block Function; Check The Upper And Lower Busbar Voltage Limit - ABB Relion 670 Series Commissioning Manual

1MRK 511 403-UEN E
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
cause the alarm or blocking condition for undervoltage to reset.
11.9.4.3

Check the normal voltage regulation function

1. Review the settings for
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 (
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
this command will involve locating the allocated binary output for a raise pulse command
in the Signal Matrix in PCM600 and monitoring a positive from this output.
4. After the issue of the raise command, return the applied voltage to
5. Raise the voltage 1% above the upper deadband limit U2 and wait for the issue of a lower
command from the voltage control after the expiry of a constant or inverse time delay set
by
low pulse command in the Signal Matrix in PCM600 and monitoring a positive from this
output.
6. Return the applied voltage to
11.9.4.4

Check the undervoltage block function

1. Confirm the setting for
2. Confirm the voltage control function response to an applied voltage below
reviewing the setting in the local HMI under Main menu/Settings/IED Settings/Control/
TransformerVoltageControl(ATCC,90)/TR1ATCC:x/TR8ATCC:x/UVBk that may cause an
alarm, total or automatic block of the voltage control function to be displayed on the
local HMI.
3. Apply a voltage slightly below
function.
11.9.4.5

Check the upper and lower busbar voltage limit

1. Confirm the settings for
Settings/Control/TransformerVoltageControl(ATCC,90)/TR1ATCC:x/TR8ATCC:x/
Voltage/Umax or Umin and Main menu/Settings/IED Settings/Control/TR8ATCC (90)/
TR8ATCC:n/Voltage/Umax
2. Confirm the voltage control function response to an applied voltage below
above
Bay control REC670
Commissioning manual
UDeadband (based on percentage of nominal bus voltage) and
t1 . Detection of this command will involve locating the allocated binary output for a
Ublock , nominally at 80% of rated voltage.
Umin and Umax in the local HMI under Main menu/Settings/IED
Umax , by reviewing the settings in the local HMI under Main menu/Settings/IED
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USet according to set MeasMode to the IEDs should
t1 ) and subsequent ( t2 ) tap change commands from
USet .
Ublock and confirm the response of the voltage control
Testing functionality by secondary injection
SEMOD175185-562 v6
t1 . Detection of
USet (nominal value).
SEMOD175185-578 v6
Ublock , by
SEMOD175185-588 v6
Umin and
Section 11
157