Section 2 Pml630 Overview; Overview - ABB RELION 630 Series Technical Manual

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Section 2
2.1
PML630/Compact Load-Shedding Solution
Technical Manual
PML630 overview

Overview

PML630 is a Power Management device that provides comprehensive load-shedding
solution for the power network in an industrial plant. It protects the plant against
blackouts and power source outages due to system disturbances. This device is a
member of ABB's Relion® product family and a part of its 630 product series
characterized by functional scalability and flexible configurability. PML630 is
identical to the Relion 630 series protection relays and does not have any specific
hardware modules. It is only the application functions pre-loaded in the device that
differentiate it from the 630 series protection relays.
The device supports various modes of load-shedding.
• Fast load-shedding based on network contingencies
• Slow load-shedding based on transformer overloading or the maximum demand
violation on the grid tie feeder
• Manual load-shedding based on operator-defined priorities or amount of loads to
be shed in kW
PML630 complies to the IEC 61850 standard and offers seamless connectivity with
other Relion 615/620/630 series protection relays, RIO600 IO units and COM600 to
realize the load-shedding functionality. The device uses GOOSE and MMS
communication profiles for I/O data exchange with Relion product family protection
relays and COM600.
The PML630 load-shedding controller essentially handles load-shedding
functionality for plant electrical network. This comprises of various components.
• 6 generators
• 2 external network connectivity (tie line or grid transformers) and 6 busbars
• 15 network breakers
• 60 load-shedding groups (10 loads/load groups per busbar)
This is referred as cPMS - LS configuration A (for load-shedding power management
function).
All the six generators could also be configured as utility grid
transformers.
When the power network configuration exceeds the limits defined for a PML630 in
Configuration A, an additional PML630 device can be configured in a peer-to-peer
Section 2
PML630 overview
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