Ls Blocking And Trigger - ABB RELION 630 Series Technical Manual

1MRS757256 F
7.8.4.2
PML630/Compact Load-Shedding Solution
Technical Manual
COMP_STS_SRC1...COMP_STS_SRC4 represent the compensated circuit
breaker status of power source 1...4 respectively.
COMP_STS_SRC1...COMP_STS_SRC3 are TRUE and COMP_STS_SRC3 is
FALSE.
COMP_STS_CB12, COMP_STS_CB13, COMP_STS_CB24 and
COMP_STS_CB34 represent the compensated circuit breaker status of network
circuit breakers CB12, CB13, CB24 and CB34 respectively. COMP_STS_CB12 and
COMP_STS_CB13 are FALSE. COMP_STS_CB24 and COMP_STS_CB34 are
TRUE.
The first busbar group contains the busbar 1 with lowest busbar number as 1 and the
second busbar group contains the busbar 2, busbar 3 and busbar 4 with lowest busbar
number as 2.
Table 323: Outputs related to subnetwork equipment
Equipment
Power source
Network circuit breaker
Busbar
The subnetwork numbers of the power sources SRC1_SN_NO...SRC8_SN_NO
and network circuit breakers CB12_SN_NO...CB56_SN_NO are provided to the
LS blocking and trigger module and the Load generation balance module.
The subnetwork numbers of the busbars BB1_SN_NO...BB6_SN_NO are provided
to the Load generation balance module.
The active or inactive status of the subnetworks SN_ACTIVE
to the Subnetwork priority calculation module and General logic module.
The subnetwork numbers of the power source 1 and power source 2, that is,
SRC1_SN_NO and SRC2_SN_NO are provided to the Peer load-shed logic module.

LS blocking and trigger

This module calculates fast load-shed blocking, fast load-shed trigger, slow load-shed
trigger and extended load-shed trigger for subnetwork 1...4.
Power management functions
Output
SRC1_SN_NO
SRC2_SN_NO
SRC3_SN_NO
SRC4_SN_NO
CB12_SN_NO
CB13_SN_NO
CB24_SN_NO
CB34_SN_NO
BB1_SN_NO
BB2_SN_NO
BB3_SN_NO
BB4_SN_NO
Section 7
Subnetwork number
1
2
0
2
1
2
(z = 1...4) are provided
z
281