Configuration Flexibility; Network Configuration For Cpms Load-Shedding Configuration B - ABB RELION 630 Series Product Manual

Power Management
PML630/Compact Load-Shedding Solution
Product version: 1.2.1

9. Configuration flexibility

The configuration aspects provide flexibility in the allocation of
power sources (grid transformers and generators) depending
on the project requirements.
Connectivity from a power network to a utility grid or other
power networks can be achieved through the grid 1 or grid 2
power sources.
If the number of loads in a bus bar exceeds 10 and the number
of busbars is less than six, an additional busbar with a virtual
bus coupler (permanently closed status) can be configured. The
load feeders can be distributed across the two bus bars.
Additional binary and arithmetic logic can be realized for
tailoring the load-shedding functionality towards customer-
specific requirements.
10. Network configuration for cPMS load-shedding
Configuration B
When the power network configuration exceeds the limits
defined for PML630 in Configuration A, an additional PML630
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device can be configured in a peer-to-peer fashion, thereby
dividing the network into sectors called power network areas.
Hence, each PML630 is responsible for the load-shedding
action in its respective area, based on the power source
capabilities and the inter-power network area connectivity
status. The coordination of the load-shedding actions between
the PML630 devices is achieved by suitable parametrization.
This arrangement of multiple PML630 devices in a peer-to-peer
fashion is designated as cPMS load-shedding Configuration B.
The PML630 devices communicate with each other over IEC
61850 GOOSE.
Likewise, the cPMS load-shedding Configuration B is also a
feature in PML630. The Configuration B is always built up over
and above the Configuration A and hence the latter is a
prerequisite.
The maximum recommended number of PML630 devices in the
peer-to-peer mode in a Configuration B is three.
The power network areas are connected to each other through
their grid 1 or grid 2 feeder connection points.
1MRS757334 E
ABB