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Table 308:
Calculation of compensated CB status for power source 1
Setting Grid1 connectivity
The calculated Compensated CB status for Power source 1
External source
CCB_CLS_SRC1
Peer substation
CCB_CLS_SRC1
AND
RCV_CB_STS1
ENA_PPLS1
RCV_CB_BLK1
PPLS1_QVAL
AND
AND
AND
OR
COMP_CB_SRC1
Table 309:
Calculation of island or parallel status for power source 1
Setting Grid1 connectivity
The calculated island parallel status for Power source 1
“External source”
ISD_PAR_SRC1
“Peer substation”
ISD_PAR_SRC1
AND
RCV_CB_STS1
ENA_PPLS1
RCV_CB_BLK1
PPLS1_QVAL
AND
AND
AND
OR
Island parallel (To Busbar logic module)
This module calculates
CB_BLK_SRC1
, that is, circuit breaker blocking status for
adjacent electrical area connected by power source 1 if any of the following conditions
is satisfied.
•
The
Grid1 connectivity
setting is set to “External source”.
•
The configuration error for power source 1 is activated.
•
FLS_BLK_SRC1
is activated.
The fast load-shedding blocking status for power source 1 is activated if
FLS_BLK_SRC1
is activated or power source 1 configuration error is activated.
The fast load-shedding trigger for power source 1 is activated if the following
conditions are satisfied.
•
If
FLS_TRG_SRC1
is activated.
•
If
RCV_CB_STS1
changes from TRUE to FALSE, provided
Grid1 connectivity
setting is set to “Peer substation” and
RCV_CB_BLK1
is inactive and input
PPLS1_QVAL
is "Good" and fast load-shedding blocking status (as calculated
above) is inactive.
The logic is also identical for calculating the compensated circuit
breaker status, island parallel status, fast load-shedding blocking
status, circuit breaker blocking status and fast load-shedding trigger
by considering the corresponding data for power source 2,
Grid2
1MRS757256 F
Section 7
Power management functions
PML630/Compact Load-Shedding Solution
267
Technical Manual
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