ABB RELION REX640 Technical Manual page 1407

1MRS759142 F
G1
Figure 797: Topology of a DGMS system with all generators in a single network
Subnetwork 1
G1
Figure 798: Topology of a DGMS system with 3 subnetworks
The connection of a generator to a particular busbar can be configured by using
corresponding settings,
can be set to values "Bus 1" to "Bus 8" or to "Not configured".
For example, if generator 1 is connected to busbar1, then
"Bus 1". If suppose there are only four generators in the system, then settings
busbar Num to Gn 8 busbar Num are set to "Not configured".
The tie breaker connects different busbar to form the different subnetwork groups.
Each tie breaker connects two busbars and these are referred to as bus A and bus B.
Hence, two settings are used to indicate the connection of a tie breaker to the two
busbars.
For example: If tie breaker 1 connects busbar1 and busbar2, then setting
busbar A Num is set to "Bus 1" and Tie 1 busbar B Num is set to "Bus 2". If a tie
breaker is not configured in the network, it is set to "Not configured".
The entire network configuration can be modeled in a similar method using settings
Tie 2 busbar A Num, Tie 2 busbar B Num ... Tie 8 busbar A Num and Tie 8 busbar B
Num .
Once the entire network has been defined using the settings as mentioned above,
the module identifies the existing network topology through the status of GCBs
and the tie breakers. The status of the local GCB is obtained through confirmed
closed and open inputs GCB_CLOSED and GCB_OPEN, whereas the adjacent tie
breaker statuses are received through inputs, TIE_A_CLOSED, TIE_A_OPEN,
TIE_B_CLOSED and TIE_B_OPEN. The status of other GCBs and tie breakers are
obtained from corresponding weighted integer inputs GEN1_DATA ... GEN8_DATA.
REX640
Technical Manual
G3
G2
GCB1 GCB2
Tie breaker1 Tie breaker2
BB1 BB2
BB3
Subnetwork 2
G2
GCB1 GCB2
Tie breaker1
BB1
BB2
(a)
Gn 1 busbar Num to Gn 8 busbar Num . Each of the settings
The numbering of each GCB is assumed to be same as the number
given to the generator it is connected to. That is, GCB1 assumed to be
connected to generator 1, GCB2 to generator 2 and so on.
The module expects that the tie breaker which connects to the lower
numbered busbar is configured as tie breaker A and the tie breaker which
connects to the higher numbered busbar as tie breaker B.
G5
G4
GCB3 GCB4 GCB5
Tie breaker3 Tie breaker4 Tie breaker5
BB4 BB5
G3
G4
GCB3 GCB4
Tie breaker2
BB3 BB4
(b)
Condition monitoring functions
G6 G7
GCB6 GCB7
Tie breaker6 Tie breaker7
BB6 BB7
Subnetwork 5
G5
G6 G7
GCB5 GCB6
Tie breaker3 Tie breake4
BB5 BB6 BB7
(c)
Gn 1 busbar Num is set to
G8
GCB8
Tie breaker8
BB8
G8
GCB7 GCB8
Tie breaker5
BB8
Gn 5
Tie 1
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