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Table 292:
The calculation of load shed blocking signal for tie breaker configuration
CB configuration
setting
CB Pow consider
setting
Conditions
Load shed blocking signal
Tie breaker
Sending end IED
Receiving end IED
A = input SND_IED_QVAL is
Bad or RCV_IED_QVAL is
Bad (Within measurement
cycle)
0
1
0
T
2
T
3
T
4
T
A
Load shed blocking
1
Tie breaker
Sending end IED
A = input SND_IED_QVAL is
Bad (At measurement cycle)
At the instance of
measurement cycle
0
1
0
T
2
T
3
T
4
T
A
Load shed blocking
1
Identical logic if the
CB Pow consider
setting is selected as "Receiving end IED"
and input
RCV_IED_QVAL
is “Bad” at
measurement cycle.
Tie breaker
Sending end IED
A = input RCV_IED_QVAL is
Bad (At measurement cycle)
At the instance of
measurement cycle
0
1
0
T
2
T
3
T
4
T
A
Load shed blocking
1
Identical logic if the
CB Pow consider
setting is selected as "Receiving end IED"
and input
SND_IED_QVAL
is “Bad” at
measurement cycle.
Tie breaker
Sending end IED
Receiving end IED
A = input SND_IED_TEST is
TRUE or SND_CB_POS is
Invalid or RCV_IED_TEST is
TRUE or RCV_CB_POS is
Invalid
0
1
0
A
Load shed blocking
1
t (time)
Tie breaker
Sending end IED
Receiving end IED
A = input SND_CB_POS is
Intermediate
0
1
0
A
Load shed blocking
1
t (time)
time
Interm
CB
Snd
Δt
time
Interm
CB
Snd
Δt
Identical logic if input
RCV_CB_POS
is
“Intermediate” and the ∆t value exceeds or
is less than the
Rcv CB Interm time setting
as shown above.
1MRS757256 F
Section 7
Power management functions
PML630/Compact Load-Shedding Solution
253
Technical Manual
Содержание Relion 630 Series
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