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If the fast load-shedding trigger is activated for any power source (power source
1...power source 8), fast load-shedding trigger
SRC_FLS_TRG
is activated.
The busbar number of power sources are represented by
BB_NUMBER
signal. For
example, the
BB_NUMBER
= 4332121 represents busbar number of power source 1 =
1, busbar number of power source 2 = 2, busbar number of power source 3 = 1, busbar
number of power source 4 = 2, busbar number of power source 5 = 3, busbar number
of power source 6 = 3, busbar number of power source 7 = 4 and busbar number of
power source 8 = 4.
The module reports the slow load-shedding start and fast load-shedding trigger signal
to the Binary to integer module.
The module reports the slow load-shedding trigger and slow load-shedding enabling
status signals for each power source to the Busbar logic module.
7.7.4.7
Load-shed sharing mode
The module calculates the spinning reserve sharing mode and must-shedding sharing
mode. These modes determine how to share the spinning reserve and must shed with
the PML630s installed in the adjacent electrical network areas.
Based on the condition1 and condition2, the module calculates the must-shedding
sharing mode
MUST_SHD_MOD
and spinning reserve sharing mode
SP_RESV_MOD
.
also show the values corresponding to the must-shedding
sharing mode and spinning reserve sharing mode, for example, must-shedding sharing
mode = 2 (Zero-full) means the must-shedding shared with adjacent electrical
network area1 is zero and the must-shedding shared with adjacent electrical network
area 2 is full.
Table 311:
Calculation of must-shedding sharing mode
Sl No
Condition1
Condition2
MUST_SHD_MOD
1
If all the following conditions are satisfied:
•
Grid1 connectivity setting is Peer substation.
•
Input PPLS1_QVAL is Good.
•
COMP_CB_SRC1 is TRUE.
•
ENA_PPLS1 signal is TRUE.
•
RCV_MS_STS1 is FALSE.
•
LS_BLK_STS1 is FALSE.
If all the following conditions are satisfied:
•
Grid2 connectivity setting is Peer substation.
•
Input PPLS2_QVAL is Good.
•
COMP_CB_SRC2 is TRUE.
•
ENA_PPLS2 signal is TRUE.
•
RCV_MS_STS2 is FALSE.
•
LS_BLK_STS2 is FALSE.
Extended LS
sharing setting
2
X
condition1
Y
condition2
2 (Zero-full)
3
Y
condition1
X
condition2
3 (Full-zero)
4
X
condition1
X
condition2
Extended LS
sharing setting
Section 7
1MRS757256 F
Power management functions
270
PML630/Compact Load-Shedding Solution
Technical Manual
Summary of Contents for Relion 630 Series
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