PD IEC/TR 61850-90-4:2013

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, abbreviations and
   conventions
4 Overview of IEC 61850 networks
5 Network design checklist
6 Ethernet technology for substations
7 Network and substation topologies
8 Addressing in the substation
9 Application parameters
10 Performance
11 Latency
12 Network traffic control
13 Dependability
14 Time services
15 Network security
16 Network management
17 Remote connectivity
18 Network testing
19 IEC 61850 bridge and port object model
Annex A (informative) - Case study - Process bus
        configuration for busbar protection system
Annex B (informative) - Case study - Simple Topologies
        (Transener/Transba, Argentina)
Annex C (informative) - Case study - An IEC 61850
        station bus (Powerlink, Australia)
Annex D (informative) - Case study - Station bus with
        VLANs (Trans-Africa, South Africa)
Bibliography

Specifies the advantages and disadvantages of different approaches to network topology, redundancy, clock synchronization, etc. so that the network designer can make educated decisions.

This part of IEC 61850, which is a Technical Report, is intended for an audience familiar with network communication and/or IEC 61850-based systems and particularly for substation protection and control equipment vendors, network equipment vendors and system integrators.

This Technical Report focuses on engineering a local area network limited to the requirements of IEC 61850-based substation automation. It outlines the advantages and disadvantages of different approaches to network topology, redundancy, clock synchronization, etc. so that the network designer can make educated decisions. In addition, this report outlines possible improvements to both substation automation and networking equipment.

This Technical Report addresses the most critical aspects of IEC 61850, such as protection related to tripping over the network. This Technical Report addresses in particular the multicast data transfer of large volumes of sampled values (SV) from merging units (MUs). It also considers the high precision clock synchronization and “seamless” guaranteed transport of data across the network under failure conditions that is central to the process bus concept.

This Technical Report is not a tutorial on networking or on IEC 61850. Rather, it references and summarizes standards and publications to assist the engineers. Many publications discuss the Ethernet technology but do not address the networks in terms of substation automation. Therefore, many technologies and options have been ignored, since they were not considered relevant for a future-proof substation automation network design.

This Technical Report does not address network security.

This Technical Report does not address substation-to-substation communication, or substation to control centre communication. Inter-substation communication involves WAN technologies other than Ethernet, but when it uses Ethernet on layer 2, parts of this report can be applied. For inter-substation communication which uses exclusively the routable Internet Protocol, more adapted guidelines are in discussion within IEC TC 57, especially in documents IEC/TR 61850-90-1, IEC 61850-90-21, and IEC/TR 61850-90-5, which will be addressed in the WAN engineering guidelines, IEC 61850-90-122.

This Technical Report does not dispense the responsible system integrator from an analysis of the actual application configuration, which is the base for a dependable system.