Settings/Setting group N/Control/TransformerVoltageControl(ATCC,
90)/TR1ATCC:x/TR8ATCC:x/Time/t1 and t2
6.
Apply a 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 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 U
B
for the master transformer that is 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
t2
.
9.
Confirm that all follower transformers in the group change tap in accordance
with this command.
Circulating current voltage regulation
This instruction for confirmation of circulating current voltage regulation assumes
two transformers in the parallel group. Setting confirmation through secondary
injection requires calculation of circulating currents for each transformer based on
impedance values and respective compensating factors, and is therefore more
complex for greater than two transformers.
1.
Confirm that
OperationPAR
is set to
CC
for the transformers in the parallel
group.
2.
For parallel operation, it is also recommended that settings be confirmed for
parallel group membership, governed by setting
TnRXOP
in the local HMI
under
Main menu/Settings/Setting group N/Control/
TransformerVoltageControl(ATCC,90)/TR8ATCC:x/ParCtrl
The general parallel arrangement of transformers are defined by setting
TnRXOP
to
On
or
Off
. The following rules are applicable on the settings
T1RXOP
-
T4RXOP
.
If IED
T1
and
T2
are connected,
•
T1RXOP
shall be set to
On
in instance 2 of TR8ATCC, and
•
T2RXOP
shall be set to
On
in instance 1 of TR8ATCC.
If
T1
-
T3
are available,
•
T1RXOP
and
T2RXOP
shall be set to
On
in instance 3 of TR8ATCC,
•
T2RXOP
and
T3RXOP
shall be set to
On
in instance 1 of TR8ATCC and
so on.
1MRK502053-UEN B
Section 12
Testing functionality by secondary injection
Generator protection REG670 2.0 IEC
219
Commissioning manual
Содержание REG670 2.0 IEC
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