ABB RELION 670 Series Applications Manual page 593

1MRK 504 152-UEN B
The transformers controlled in parallel with the circulating current method or the master-
follower method must be assigned unique identities. These identities are entered as a setting
in each TR8ATCC, and they are predefined as T1, T2, T3,..., T8 (transformers 1 to 8). In figure
there are three transformers with the parameter
For parallel control with the circulating current method or the master-follower method
alternatively, the same type of data set as described above, must be exchanged between two
TR8ATCC. To achieve this, each TR8ATCC is transmitting its own data set on the output
ATCCOUT as previously mentioned. To receive data from the other transformers in the parallel
group, the output ATCCOUT from each transformer must be connected (via GOOSE or
internally in the application configuration) to the inputs HORIZx (x = identifier for the other
transformers in the parallel group) on TR8ATCC function block. Apart from this, there is also a
setting in each TR8ATCC =/,..., =/
determines from which of the other transformer individuals that data shall be received.
Settings in the three TR8ATCC blocks for the transformers in figure 351, would then be
according to the table 54:
Table 54: Setting of TxRXOP
TrfId=T1 T1RXOP=
Off
TrfId=T2 T1RXOP=
On
TrfId=T3 T1RXOP=
On
Observe that this parameter must be set to
with identity T1 parameter
Blocking
Blocking conditions
The purpose of blocking is to prevent the tap changer from operating under conditions that
can damage it, or otherwise when the conditions are such that power system related limits
would be exceeded or when, for example the conditions for automatic control are not met.
For the Automatic voltage control for tap changer function, TR1ATCC for single control and
TR8ATCC for parallel control, three types of blocking are used:
Partial Block: Prevents operation of the tap changer only in one direction (only URAISE or
ULOWER command is blocked) in manual and automatic control mode.
Auto Block: Prevents automatic voltage regulation, but the tap changer can still be controlled
manually.
Application manual
Manual configuration of VCTR GOOSE data set is required. Note that both data
value attributes and quality attributes have to be mapped. The following data
objects must be configured:
• BusV
• LodAIm
• LodARe
• PosRel
• SetV
• VCTRStatus
• X2
T1RXOP=Off/On,..., T8RXOP=Off/ On . This setting
T2RXOP= T3RXOP=
On On
T2RXOP= T3RXOP=
Off On
T2RXOP= T3RXOP=
On Off
T1RXOP must be set to Off , and so on.
TrfId set to T1, T2 and T3 , respectively.
T4RXOP= T5RXOP=
Off Off
T4RXOP= T5RXOP=
Off Off
T4RXOP= T5RXOP=
Off Off
Off for the "own" transformer. (for transformer
T6RXOP= T7RXOP=
Off Off
T6RXOP= T7RXOP=
Off Off
T6RXOP= T7RXOP=
Off Off
Section 14
Control
351
T8RXOP=
Off
T8RXOP=
Off
T8RXOP=
Off
SEMOD159053-275 v2
SEMOD159053-277 v6
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