Prp Application In The Substation; High-Availability Seamless Redundancy (Hsr); Hsr Multicast Topology; Figure 191: Prp Application In The Substation - GE MiCOM P40 Agile Technical Manual

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P14x
5.2.1

PRP APPLICATION IN THE SUBSTATION

DS Agile gateways
H600 switch
Ethernet
Up to
6 links
C264
RS485
Bay level
Type 1
E01017

Figure 191: PRP application in the substation

5.3

HIGH-AVAILABILITY SEAMLESS REDUNDANCY (HSR)

HSR is standardized in IEC 62439-3 (clause 5) for use in ring topology networks. Similar to PRP, HSR provides
bumpless redundancy and meets the most demanding needs of substation automation. HSR has become the
reference standard for ring-topology networks in the substation environment. The HSR implementation of the
redundancy Ethernet board (REB) is compatible with any standard HSR device.
HSR works on the premise that each device connected in the ring is a doubly attached node running HSR (referred
to as DANH). Similar to PRP, singly attached nodes such as printers are connected via Ethernet Redundancy Boxes
(RedBox).
5.3.1

HSR MULTICAST TOPOLOGY

When a DANH is sending a multicast frame, the frame (C frame) is duplicated (A frame and B frame), and each
duplicate frame A/B is tagged with the destination MAC address and the sequence number. The frames A and B
differ only in their sequence number, which is used to identify one frame from the other. Each frame is sent to the
network via a separate port. The destination DANH receives two identical frames, removes the HSR tag of the first
frame received and passes this (frame D) on for processing. The other duplicate frame is discarded. The nodes
forward frames from one port to the other unless it was the node that injected it into the ring.
P14xEd1-TM-EN-1
MiCOM H382
C264 *
H368
Ethernet
Up to
4 links
Bay level
Type 2
TX copper link
FX optical fibre Ethernet
RS485, RS422
For PRP this is SRP, for DHP this is SWD
*
** For PRP this is PRP REB, for DHP this is DHP REB
Chapter 18 - Communications
SCADA or PACiS OI
H600 switch
Px4x **
Bay level
Type 3
391

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