Communication. ABB Relion 611 Series, REU611 2.0 IEC, Voltage Protection, Application, Relion, REU611

1MRS758335 D

2.7

REU611

Application Manual

Section 2

REU611 overview

Table 8:

Audit trail event

Configuration change

Firmware change

Firmware change fail

Attached to retrofit test case

Removed from retrofit test case

Setting group remote

Setting group local

Control remote

Control local

Test on

Test off

Reset trips

Setting commit

Time change

View audit log

Login

Logout

Password change

Firmware reset

Violation local

Violation remote

Comparison of authority logging levels

None

Configurati on change

●

●

●

●

Authority logging level

Setting group

Setting group, control

●

●

●

●

●

●

●

●

● ●

●

●

●

●

●

●

●

●

●

●

Settings edit

●

●

●

●

●

●

●

●

●

●

●

●

●

All

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

Communication

The protection relay supports a range of communication protocols including IEC

61850 and Modbus ® . Operational information and controls are available through these protocols. However, some communication functionality, for example, horizontal communication between the protection relays, is only enabled by the IEC

61850 communication protocol.

The IEC 61850 communication implementation supports all monitoring and control functions. Additionally, parameter settings, disturbance recordings and fault records can be accessed using the IEC 61850 protocol. Disturbance recordings are available to any Ethernet-based application in the IEC 60255-24 standard COMTRADE file format. The protection relay can send and receive binary signals from other devices

(so-called horizontal communication) using the IEC 61850-8-1 GOOSE profile,

19

Section 2

REU611 overview

2.7.1

1MRS758335 D where the highest performance class with a total transmission time of 3 ms is supported. The protection relay meets the GOOSE performance requirements for tripping applications in distribution substations, as defined by the IEC 61850 standard.

The protection relay can support five simultaneous clients. If PCM600 reserves one client connection, only four client connections are left, for example, for IEC 61850 and Modbus.

All communication connectors, except for the front port connector, are placed on integrated optional communication modules. The protection relay can be connected to

Ethernet-based communication systems via the RJ-45 connector (100Base-TX) or the fiber-optic LC connector (100Base-FX). An optional serial interface is available for

RS-485 communication.

Self-healing Ethernet ring

For the correct operation of self-healing loop topology, it is essential that the external switches in the network support the RSTP protocol and that it is enabled in the switches. Otherwise, connecting the loop topology can cause problems to the network. The protection relay itself does not support link-down detection or RSTP.

The ring recovery process is based on the aging of the MAC addresses, and the linkup/link-down events can cause temporary breaks in communication. For a better performance of the self-healing loop, it is recommended that the external switch furthest from the protection relay loop is assigned as the root switch (bridge priority

= 0) and the bridge priority increases towards the protection relay loop. The end links of the protection relay loop can be attached to the same external switch or to two adjacent external switches. A self-healing Ethernet ring requires a communication module with at least two Ethernet interfaces for all protection relays.

20 REU611

Application Manual

1MRS758335 D

Client A

Manag ed Eth ernet switch with RSTP su pport

Section 2

REU611 overview

Client B

Manag ed Eth ernet switch with RSTP su pport

Network

Network

2.7.2

REU611

Application Manual

GUID-A19C6CFB-EEFD-4FB2-9671-E4C4137550A1 V2 EN

Figure 6: Self-healing Ethernet ring solution

The Ethernet ring solution supports the connection of up to 30 protection relays. If more than 30 protection relays are to be connected, it is recommended that the network is split into several rings with no more than 30 protection relays per ring. Each protection relay has a 50-μs store-and-forward delay, and to fulfil the performance requirements for fast horizontal communication, the ring size is limited to 30 protection relays.

Ethernet redundancy

IEC 61850 specifies a network redundancy scheme that improves the system availability for substation communication. It is based on two complementary protocols defined in the IEC 62439-3:2012 standard: parallel redundancy protocol

PRP and high-availability seamless redundancy HSR protocol. Both protocols rely on the duplication of all transmitted information via two Ethernet ports for one logical network connection. Therefore, both are able to overcome the failure of a link or switch with a zero-switchover time, thus fulfilling the stringent real-time requirements for the substation automation horizontal communication and time synchronization.

PRP specifies that each device is connected in parallel to two local area networks.

HSR applies the PRP principle to rings and to the rings of rings to achieve costeffective redundancy. Thus, each device incorporates a switch element that forwards frames from port to port. The HSR/PRP option is available for all 611 series protection relays.

21

Section 2

REU611 overview

1MRS758335 D

IEC 62439-3:2012 cancels and replaces the first edition published in

2010. These standard versions are also referred to as IEC 62439-3

Edition 1 and IEC 62439-3 Edition 2. The protection relay supports

IEC 62439-3:2012 and it is not compatible with IEC 62439-3:2010.

PRP

Each PRP node, called a double attached node with PRP (DAN), is attached to two independent LANs operated in parallel. These parallel networks in PRP are called

LAN A and LAN B. The networks are completely separated to ensure failure independence, and they can have different topologies. Both networks operate in parallel, thus providing zero-time recovery and continuous checking of redundancy to avoid communication failures. Non-PRP nodes, called single attached nodes (SANs), are either attached to one network only (and can therefore communicate only with

DANs and SANs attached to the same network), or are attached through a redundancy box, a device that behaves like a DAN.

Managed

Ethernet switch

IEC 61850 PRP

Managed

Ethernet switch

22

GUID-AA005F1B-A30B-48F6-84F4-A108F58615A2 V1 EN

Figure 7: PRP solution

In case a laptop or a PC workstation is connected as a non-PRP node to one of the PRP networks, LAN A or LAN B, it is recommended to use a redundancy box device or an

Ethernet switch with similar functionality between the PRP network and SAN to remove additional PRP information from the Ethernet frames. In some cases, default

PC workstation adapters are not able to handle the maximum-length Ethernet frames with the PRP trailer.

There are different alternative ways to connect a laptop or a workstation as SAN to a

PRP network.

REU611

Application Manual

1MRS758335 D

Section 2

REU611 overview

• Via an external redundancy box (RedBox) or a switch capable of connecting to

PRP and normal networks

• By connecting the node directly to LAN A or LAN B as SAN

• By connecting the node to the protection relay's interlink port

HSR

HSR applies the PRP principle of parallel operation to a single ring, treating the two directions as two virtual LANs. For each frame sent, a node, DAN, sends two frames, one over each port. Both frames circulate in opposite directions over the ring and each node forwards the frames it receives, from one port to the other. When the originating node receives a frame sent to itself, it discards that to avoid loops; therefore, no ring protocol is needed. Individually attached nodes, SANs, such as laptops and printers, must be attached through a “redundancy box” that acts as a ring element. For example, a 615 or 620 series protection relay with HSR support can be used as a redundancy box.

Devices not supporting HSR

Ethernet switch

Redundancy box

Redundancy box

Redundancy box

X

X

IEC 61850 HSR

X

Unicast traffic

Message is recognized as a duplicat e and is immediately forwarded

Sending device removes the message from t he ri ng

2.7.3

REU611

Application Manual

GUID-B24F8609-0E74-4318-8168-A6E7FCD0B313 V1 EN

Figure 8: HSR solution

Secure communication

The protection relay supports secure communication for WHMI and file transfer protocol. If the Secure Communication parameter is activated, protocols require TLS based encryption method support from the clients. In this case WHMI must be connected from a Web browser using the HTTPS protocol and in case of file transfer the client must use FTPS.

As a factory default, Secure Communication is “ON”.

23

24