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Table 312:
Calculation of spinning reserve sharing mode
Sl No
Condition1
Condition2
SP_RESV_MOD
1
If all the following conditions are satisfied:
•
Grid1 connectivity setting is Peer substation.
•
Input PPLS1_QVAL is Good.
•
COMP_CB_STS1 is TRUE.
•
ENA_PPLS1 signal is TRUE.
If all the following conditions are satisfied:
•
Grid2 connectivity setting is Peer substation.
•
Input PPLS2_QVAL is Good.
•
COMP_CB_STS2 is TRUE.
•
ENA_PPLS2 signal is TRUE.
2 (Full-full)
2
X
condition1
Y
condition2
3 (Zero-full)
3
Y
condition1
X
condition2
4 (Full-zero)
4
X
condition1
X
condition2
2 (Full-full)
Here the notation X
condition1
means at least one of the conditions in condition1 in Sl No
1 is not satisfied. The notation Y
condition1
means all the conditions in condition1 in Sl
No 1 are satisfied.
The module reports the calculated spinning reserve sharing mode and must-shedding
sharing mode to the Binary to integer module.
7.7.4.8
Busbar logic
The module calculates the fast load-shedding blocking, island parallel status, slow
load-shedding trigger, slow load-shedding enable status and the amount of overload
for busbar 1, busbar 2, busbar 3 and busbar 4.
If fast load-shed blocking signal is activated for any power source <n> configured on
busbar <x>, fast load-shed blocking signal
FLS_BLK_BB <x>
is activated for the
corresponding busbar (Here x = 1 to 4).
Similar logic is used for calculation of the island parallel status
ISD_PAR_BB <x>
, slow load-shedding trigger
SLS_TRG_BB
<x>
and slow load-shedding enable signal
SLS_ENA_BB <x>
for
busbar 1, busbar 2, busbar 3 and busbar 4.
If slow load-shed trigger is activated for any power source <n> configured on busbar
<x>, overload amount for busbar <x>,
OV_LOAD_BB <x>
is same as the overload
amount
OVLOD_SRC <n>
for the corresponding power source. If slow load trigger
is activated for all power sources at the same instance,
OV_LOAD_BB <x>
is the sum
of overload amount for the corresponding power sources connected to the same
busbar.
The overload amount for any busbar remains zero if the slow load-
shedding trigger is inactive for respective power sources on the same
busbar.
1MRS757256 F
Section 7
Power management functions
PML630/Compact Load-Shedding Solution
271
Technical Manual
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