ABB RELION 630 Series Product Manual page 17

Power Management
PML630/Compact Load-Shedding Solution
Product version: 1.2.1
– Load circuit breaker position (open or closed)
– Load-shedding inhibition status for load (1...10)
– Load feeder priority (1...10)
– Single or multiple basic function setting changes
– Subnetwork number
For 15 network circuit breakers
• Measurement information
– Total active power flow
• Status information
– Position (open or closed)
– Load-shedding blocked due to the network circuit
breaker
– Load-shedding blocking bypassed
– Load-shedding triggered from the network circuit
breaker
– Single or multiple basic function setting changes
– Virtual circuit breaker setting enabled for the network
circuit breaker
– Subnetwork number
For four subnetworks
• Measurement information
– Accumulated load against priority 1...19
– Total available power (sum of power values from all the
generators and the grid tie or transformers inclusive)
– Total running load from the power sources
– Total sheddable load (sum of sheddable loads)
– Power imbalance (spinning reserve power)
– Effective power difference considering the spinning
reserve from adjacent network area (difference of load
value between actual shedding and required shedding)
– Required load-shedding (minimum load value that must
be shed to establish power balance)
– Actual load-shedding (load value of the calculated
shedding priority)
– Power difference (difference of the load value between
actual shedding and required shedding)
– Manual load to be shed in kW
– Load inhibition by operator
– Load inhibition by system
– Load mismatch
– Total value of non-sheddable loads
• Status information
– Load-shedding block status
– Load-shedding operation
– Fast or slow or manual or extended from the adjacent
power network area; Configuration B mode load-
shedding operation
– Calculated shedding priority record 1
– Calculated shedding priority record 2
– Calculated shedding priority record 3
– Manual load-shedding priority status
– Negative power balance status
– Status (active or inactive)
ABB
– Status (enable or disable)
– Slow load-shedding block status
– Load-shedding reset command status
– Load-shedding counter reset command status
– Manual load-shedding command status
Common load-shedding data
• Status information
– General load-shedding function start (Fast or slow or
manual or extended from the adjacent power network
area; Configuration B mode)
– General load-shedding function operation (Fast or slow
or manual or extended from the adjacent power network
area; Configuration B mode)
– General slow load-shedding start
– General slow load-shedding operation
– Fast load-shedding start
– Disturbance recorder memory used alarm
– Disturbance recorder record cleared status
– Disturbance recorder files made status
– Disturbance recorder process start status
– PML630 device test mode status
– Fast load-shedding counter value
– Manual load-shedding behavior (Priority setting or kW
setting or priority input or kW input or priority setting
active due to the bad quality of input or kW setting active
due to the bad quality of input or manual load-shedding
disabled)
– Single or multiple basic core function setting changes
– load-shedding data (encoded) for the adjacent network
area PML630 device; Configuration B
– Subnetwork load-shedding blocked due to
interconnected circuit breaker in the adjacent power
network area; Configuration B
– Circuit breaker status of the interconnected tie feeder
with the adjacent power network area; Configuration B
– Subnetwork load-shedding blocked in the adjacent
power network area; Configuration B
– Error in received load-shedding data from the adjacent
network area device; Configuration B
– Error in sending load-shedding data to the adjacent
network area device; Configuration B
– Device in test mode information; Configuration B
COM600S or COM600F provides the load-shedding control
actions to PML630.
• Fast load-shedding - overall and individual subnetwork load-
shedding reset command
• Slow load-shedding - IDMT-based reset command
• Manual load-shedding - command for every subnetwork
Hardwired Inputs and Outputs
The additional hardware IO configuration for PML630
comprises two types of analog boards. The analog boards are a
mandatory part of the PML630 device order code as the boot
1MRS757334 E
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