IEC TR 61850-90-12:2015

IEC TR 61850-90-12 ®
Edition 1.0 2015-07
TECHNICAL
REPORT
colour
inside
Communication networks and systems for power utility automation –
Part 90-12: Wide area network engineering guidelines

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IEC TR 61850-90-12 ®
Edition 1.0 2015-07
TECHNICAL
REPORT
colour
inside
Communication networks and systems for power utility automation –

Part 90-12: Wide area network engineering guidelines

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.200 ISBN 978-2-8322-2806-7

– 2 – IEC TR 61850-90-12:2015 © IEC 2015

CONTENTS
FOREWORD . 11

INTRODUCTION . 13

1 Scope . 15

2 Normative references . 15

3 Terms, definitions, abbreviations, acronyms and symbols . 20

3.1 Terms and definitions . 20

3.2 Abbreviations and acronyms . 25
3.3 Network diagram symbols . 32
4 Wide Area Communication in electrical utilities . 34
4.1 Executive summary . 34
4.2 Use Case: ENDESA, Andalusia (Spain) . 36
4.3 Typical interface between a substation and the WAN . 38
4.4 WAN characteristics and actors . 39
4.5 SGAM Mapping . 40
4.6 Network elements and voltage level . 42
4.7 WAN interfaces in substation automation (IEC 61850-5) . 43
4.8 Logical interfaces and protocols in the TC57 Architecture IEC TR 62357 . 44
4.9 Network traffic and ownership . 45
5 WAN overall requirements and data transmission metrics . 45
5.1 Traffic types . 45
5.2 Quality of Service (QoS) of TDM and PSN . 46
5.3 Latency calculation . 46
5.3.1 Latency components . 46
5.3.2 Propagation delay . 46
5.3.3 Residence delay . 47
5.3.4 Latency accumulation . 47
5.3.5 Example: latency of a microwave system . 47
5.3.6 Latency and determinism . 47
5.3.7 Latency classes in IEC 61850-5 . 48
5.4 Jitter . 50
5.4.1 Jitter definition . 50
5.4.2 Jitter classes in IEC 61850 . 51

5.5 Latency symmetry and path congruency . 51
5.6 Medium asymmetry . 51
5.7 Communication speed symmetry . 52
5.8 Recovery delay . 52
5.9 Time accuracy . 52
5.9.1 Time accuracy definition . 52
5.9.2 Time accuracy classes. 53
5.10 Tolerance against failures . 54
5.10.1 Failure . 54
5.10.2 Reliability. 54
5.10.3 Redundancy principles. 55
5.10.4 Redundancy and reliability . 55
5.10.5 Redundancy checking . 56
5.10.6 Redundant layout: single point of failure . 57

5.10.7 Redundant layout: cross-redundancy . 57

5.10.8 Maintainability . 58

5.10.9 Availability . 58

5.10.10 Integrity . 60

5.10.11 Dependability . 62

5.10.12 Example: Dependability of GOOSE transmission . 62

6 Applications analysis . 62

6.1 Application kinds . 62

6.2 Teleprotection (IF2 & IF11) . 63

6.2.1 Teleprotection schemes . 63
6.2.2 Teleprotection data kinds . 64
6.2.3 Teleprotection requirements for latency . 64
6.2.4 Teleprotection requirements for latency asymmetry . 64
6.2.5 Teleprotection requirements for integrity . 64
6.2.6 Teleprotection summary . 65
6.3 Telecontrol (IF1, IF6) . 65
6.4 Substation to control centre (IF10) . 66
6.5 CMD (IF7) . 67
6.5.1 CMD overview . 67
6.5.2 CMD communication requirements . 67
6.6 Control Centre to Control Centre (IF12) . 67
6.7 Wide Area Monitoring System (IF13) . 68
6.7.1 WAMS overview . 68
6.7.2 WAMS topology . 68
6.7.3 WAMS communication requirements . 70
6.8 Wide area monitoring, protection and control (WAMPAC) IF13 . 71
6.8.1 WAMPAC overview . 71
6.8.2 WAMPAC communication requirements . 71
6.8.3 Use case WAMPAC . 73
6.9 Wind turbines and wind virtual power plants . 74
6.10 Distributed Energy and Renewables (DER) . 74
6.11 Summary of communication requirements for WAN . 74
7 Wide-area and real-time network technologies. 75
7.1 Introduction . 75
7.2 Topology . 75

7.3 Overview. 76
7.4 Layer 1 (physical) transmission media . 78
7.4.1 Summary . 78
7.4.2 Installation guidelines . 78
7.4.3 Metallic lines . 79
7.4.4 Power line carrier (PLC) . 80
7.4.5 Radio transmission . 84
7.4.6 Fiber optics. 89
7.4.7 Layer 1 redundancy . 96
7.4.8 Use case: Diverse redundancy against extreme contingencies (Hydro-
Quebec) . 97
7.4.9 Layer 1 security . 98
7.5 Layer 1,5 (physical) multiplexing . 98
7.6 Layer 2 (link) technolo
...