Parallel Voltage Regulation - ABB Relion 670 Series Commissioning Manual

1MRK 511 403-UUS Rev. K
6. Confirm on the local HMI that service values for bus voltage and load current are equal to injected
quantities.
7. Confirm that the calculated value for load voltage, displayed on the local HMI, is equal to that
derived through hand calculations.
8. When setting OperationLDC set to Enabled, the voltage regulation algorithm uses the calculated
value for load voltage as the regulating quantity to compare against VSet and the voltage
deadband limits VDeadband and VDeadbandInner.
9. While injecting rated current I2Base into the IED, inject a quantity for V
VSet + |(Rline+jXLine) · I
hence no tap change command should be issued from the IED.
10. Reduce the injected voltage for V
calculated value for load voltage is below VSet and a tap change command is issued from the IED.
11.10.5.8

Parallel voltage regulation

Master follower voltage regulation
1. For the transformers connected in the parallel group, confirm that OperationPAR is set to MF.
2. For parallel operation, it is also recommended to confirm for parallel group membership, defined by
setting TnRXOP in the local HMI under Main menu/Settings/IED Settings/Control/
TransformerVoltageControl(90, U↕) /TR8ATCC(90, U↕||):x /ParCtrl
The general parallel arrangement of transformers are defined by setting TnRXOP to Enabled or
Disabled. The following rules are applicable on the settings T1RXOP – T4RXOP.
If IED T1 and T2 are connected,
•
•
•
3. The lowest transformer number in the parallel group is by default set as the Master – confirm that
this is the case by reviewing the setting in the local HMI.
4. Review the settings for VDeadband (based on percentage of nominal bus voltage) and calculate
the upper (V2) and lower (V1) voltage regulation limits for which a tap change command will be
issued from the master transformer in the group.
5. Review the expected time for first (t1) and subsequent (t2) tap change commands from the master
transformer in the local HMI under Main menu/Settings /IED Settings/Control /
TransformerVoltageControl(90, U↕)/TR1ATCC(90, U↕):x/TR8ATCC(90, U↕||):x /Time/t1 and t2
6. Apply a 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 t1. Detection of this command will involve
locating the allocated binary output for a raise command in the Signal Matrix in PCM600 and
monitoring a positive from this output. Confirm the timing of this command correlates with the
setting t1.
7. After the issue of the raise command, confirm that all follower transformers in the group change tap
in accordance with the command issued from the master transformer.
8. Inject a voltage V
wait for the issue of a lower command from the voltage control after the expiry of a constant or
inverse time delay set by t2.
9. Confirm that all follower transformers in the group change tap in accordance with this command.
Bay control REC670
Commissioning manual
|. This will ensure that the regulating voltage V
L
T1RXOP shall be set to Enabled in instance 2 of TR8ATCC (90),
T2RXOP shall be set to Enabled in instance 3 of TR8ATCC (90),
T2RXOP and T3RXOP shall be set to Enabled in instance 1 of TR8ATCC (90), and so on.
The parameter corresponding to the own IED must not be set. T1RXOP should
thus not be set in IED T1, T2RXOP not in IED T2, and so on.
for the master transformer that is 1% above the upper deadband limit V2 and
B
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slightly below VSet + |(Rline+jXLine) · I
B
Section 11
Testing functionality by secondary injection
that is slightly higher then
B
is higher than VSet, and
L
| and confirm that the
L
SEMOD175185-714 v2
SEMOD175185-716 v8
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