General Logic - ABB RELION 630 Series Technical Manual

1MRS757256 F
7.11.4.1
PML630/Compact Load-Shedding Solution
Technical Manual

General logic

This module calculates an error signal if the load-shed power of the subnetwork
SND_LS_POW exceeds 33554431 kW. This error is indicated by the LS_DATA_ER
output.
Based on various load shed information, the module calculates the LS_DATA for
adjacent electrical area.
Table 347: Output LS_DATA bits information sent to adjacent electrical area
Bit No. Signals
1 CCB_OPN_SRC
2 SP_RESV_STS
3 MUST_SHD_STS
4 LS_DATA_ER
5...29 SND_LS_POW
30 CB_BLK_SRC
31 LS_BLOCK
See NPMMXU and LSCACLS function for more information of the
signals.
Based on PPLS1_DATA or PPLS2_DATA received for adjacent electrical areas, this
module provides various load-shedding information as shown in
Table 348: The load-shedding information received from adjacent electrical area
Bits of PPLS1_DATA or PPLS2_DATA
1
2
3
4
30
31
If PEER_MS_STS of PPLS1_DATA or PPLS2_DATA is active, MUST_SHD_STS
of LS_DATA remains inactive.
The spinning reserve and must-shedding power of adjacent electrical area is
calculated as follows.
Power management functions
Table 347 shows the LS_DATA output bit-wise information.
Signal description
Compensated CB open status for power source 1 or power source 2
Spinning reserve status of subnetwork for power source 1 or power
source 2
Must-shedding status of subnetwork for power source 1 or power
source 2
Error
Load-shed power of subnetwork for power source 1 or power source 2
Fast load-shed CB blocking status for power source 1 or power source
2
Load-shedding blocking status of subnetwork for power source 1 or
power source 2
Section 7
Table 348.
Outputs
PEER_CB_STS
PEER_SR_STS
PEER_MS_STS
PEER_DATA_ER
PEER_SRC_BLK
PEER_SN_BLK
313