Secondary Test; Check The Activation Of The Voltage Control Operation - ABB rec670 Commissioning Manual

Section 10
Testing functionality by secondary injection
10.9.4.1
10.9.4.2
158
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.

Secondary test

The voltage control function performs basic voltage regulation by comparing a
calculated load voltage (U
(with upper and lower limits U2 and U1 respectively). The calculated load voltage U
represents the secondary transformer bus voltage U
compensation (LDC) where enabled in settings.
Note that when LDC is disabled, U
When the load voltage U
be taken.
If U < U1 or U > U2, a command timer will start, which is constant time or inverse
L L
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 remains outside of the voltage range defined by UDeadband and the command
L
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
back within the inner deadband range.

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
) against a voltage range defined by setting UDeadband
L
stays within the interval between U1 and U2, no action will
L
1MRK 511 360-UEN A
adjusted for Load drop
B
equals U .
B L
L
Bay control REC670 2.1 IEC
Commissioning manual
L
is brought