The participation group number for source 1...source 9 is available in the monitored
output SRC1_PTC_GRP...SRC8_PTC_GRP.
Any source can be nominated for participation in voltage and frequency matching
from the command parameter
Source1 selected
...
Source8 selected
. This selection
is confirmed from the command parameter
Confirm source Sel
. The selected
participation group information is available in monitored data SELECTED_GRP.
ASCGAPC allows multiple sources to participate in the voltage and
frequency matching simultaneously, but all the sources nominated for
matching should belong to either participation Group 2 or participation
Group 3.
One of the participating sources (set with
Tuning source
) is used for the fine tuning
of voltage and frequency. This information is sent to the corresponding source via
the respective output signal ASC_SRC1_DAT...ASC_SRC8_DAT.
Table 1550: States of MATCH STATUS
Value Description
1 (“No request”) No NSCB is selected for synchronization.
2 (“Request received”) Synchronization request is received.
3 (“No source selection”) The request is received and the command parameter
Con-
firm source Sel
is "FALSE".
4 (“Correct Src selection”) The synchronization request is received, the command pa-
rameter
Confirm source Sel
is "TRUE", and the nominated
sources belong to either Group 2 or Group 3.
5 (“Wrong source selection”) The synchronization request is received, the command pa-
rameter
Confirm source Sel
is "FALSE", and the nominated
sources do not belong to Group 2 or all belong to Group 3.
6 (“Wrong tuning Src Sel”) The source selected for fine tuning is not among the nomina-
ted sources.
8 (“Source ready”) Any of the selected sources are ready for matching.
9 (“GOV-AVR modes not OK”)
Any source is selected for matching and the governor and
AVR of all the participating sources are not in droop mode
and non-participating sources are not in “Fixed MW” and
“Fixed MVAr” mode.
The governor and Automatic Voltage Regulator (AVR) modes
corresponding to each source are received via the corre-
sponding input signal SRC1_ASC_DAT...SRC8_ASC_DAT.
If modes are different, then mode change request is
sent to the sources via the corresponding output signal
ASC_SRC1_DAT...ASC_SRC8_DAT.
10 (“GOV-AVR modes OK”) Any source is selected for matching, and its governor and
AVR are in droop mode and nonparticipating sources are in
“Fixed MW” and “Fixed MVAr” mode.
11 (“Matching in progress”) All the selected sources are issued the permission for match-
ing.
12 (“Matching done”) Matching is complete according to the NSCB under synchro-
nization.
13 (“Matching not done”) Matching is not done within the set
Max matching time
.
14 (“Int Connect,set Sync”) The network is internally connected and setting
Synchro-
check mode
in ASNSCSYN is "Synchronous".
Table continues on the next page
1MRS759142 F Control functions
REX640
Technical Manual
1617
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