Check The Normal Voltage Regulation Function - ABB RET670 Commissioning Manual

1MRK 504 154-UUS B
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
•
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-ground). 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
the alarm or blocking condition for undervoltage to reset.
10.10.3.3

Check the normal voltage regulation function

1. Review the settings for
calculate the upper (V2) and lower (V1) voltage regulation limits for which a tap change
command will be issued.
2. Review the expected time for first (
voltage control function on the local HMI under Main menu/Settings/Setting Group N/
Control/TransformerVoltageControl(ATCC,90)/TR1ATCC:x/TR8ATCC:x/Time/t1 and t2l
3. Lower the voltage 1% below V1 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
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 V2 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
t1 . Detection of this command will involve locating the allocated binary output for a low pulse
command in the Signal Matrix in PCM600 and monitoring a positive from this output.
6. Return the applied voltage to
10.10.3.4 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
Commissioning manual
Transformer Tap Control = Enable and Transformer Voltage Control = Enable
Direct tap change control
Automatic transformer voltage control
Enable Tap Command
VDeadband (based on percentage of nominal bus voltage) and
Vblock , nominally at 80% of rated voltage.
VSet according to set MeasMode to the IEDs should cause
t1 ) and subsequent ( t2 ) tap change commands from the
VSet .
Testing functionality by secondary injection
SEMOD175185-562 v5
t1 . Detection of this
VSet (nominal value).
SEMOD175185-578 v6
Vblock , by
Section 10
197