IEC TR 61850-7-5:2021

Communication networks and systems for power utility automation - Part 7-5: IEC 61850 modelling concepts

IEC TR 61850-7-5:2021, which is a technical report, establishes modelling concepts that help the user to understand how to apply the models defined in IEC 61850-7-4 and IEC 61850-7-3 to implement practical applications.
This document provides the basic concepts that are valid for all application domains using IEC 61850. Domain specific concepts are defined in other technical reports as in the document range of IEC 61850-7-5xx; as an example, IEC 61850-7-500 describes modelling concepts for functions related to substation automation.
On one side the number of potential topics for cross-domain modelling may be very high but on the other side it may be limited by domain specific restrictions often created by the historical evolution of IEC 61850 in the domains.
The first topic selected is the common control of power utility primary objects by means of the power utility automation systems based mainly on the long experience in substation automation systems. Common attributes for reliable power utility automation systems in all domains are quality and health. A special function having a broad application range in power utility automation systems is the scheduling of services as provided by the domain distributed energy resources (DER) used in smart grids, especially also for electric mobility. Not yet so much discussed in the context of IEC 61850 but very important for all IEDs is the impact of restart (power cycle) on the data model parameters. Non-agreed behaviour will raise problems for interoperability in multi-vendor systems.

General Information

• Status: Published
• Publication Date: 25-Apr-2021
• ICS: 33.200 - Telecontrol. Telemetering
• Technical Committee: TC 57 - Power systems management and associated information exchange
• Drafting Committee: WG 10 - TC 57/WG 10
• Current Stage: PPUB - Publication issued
• Start Date: 04-May-2021
• Completion Date: 26-Apr-2021

Standards Content (Sample)

IEC TR 61850-7-5 ®
Edition 1.0 2021-04
TECHNICAL
REPORT
colour
inside
Communication networks and systems for power utility automation –
Part 7-5: IEC 61850 Modelling concepts
IEC TR 61850-7-5: 2021-04 (en)

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IEC TR 61850-7-5 ®
Edition 1.0 2021-04
TECHNICAL
REPORT
colour
inside
Communication networks and systems for power utility automation –

Part 7-5: IEC 61850 Modelling concepts

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.200 ISBN 978-2-8322-9647-9

– 2 – IEC TR 61850-7-5:2021  IEC 2021
CONTENTS
CONTENTS . 2
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions. 8
3.2 Abbreviated terms . 8
4 Control . 8
4.1 Control authorization . 8
4.1.1 Basics . 8
4.1.2 Validating a control request . 9
4.1.3 Exclusive control authorization for one out of multiple actors of the
same level of control hierarchy . 12
4.1.4 Different control permissions for different actors of the same level of
control hierarchy . 13
4.2 Control authority for process equipment . 13
4.2.1 Control commands for process equipment from automations instead of
HMI . 13
5 Quality and its propagation . 15
5.1 Standard processing principle . 15
5.1.1 General . 15
5.1.2 Respecting behaviour . 15
5.1.3 LN specific calculations . 16
5.1.4 detailQual is not propagated . 16
5.1.5 Configurable propagation of the value of the element ‘source’ . 16
5.1.6 operatorBlocked is not propagated . 16
5.2 Special processing principle for (single phase) XCBR mapping to CSWI . 16
5.2.1 General . 16
5.2.2 Respecting the Behaviour . 18
5.2.3 LN specific calculations . 18
5.2.4 Propagation of detailQual . 18
5.2.5 Substitution of switchgear position signals . 18
5.2.6 operatorBlocked is not propagated . 19
5.3 Conclusion . 19
6 Health and its application . 20
6.1 General . 20
6.2 The use of LPHD.PhyHealth, LLN0.Health, LN.Health and LN.EEHealth . 20
6.3 Health in Proxy-IEDs, in LNs of type Mirror and in a LD hierarchy . 22
7 Special functions . 24
7.1 Use of cross domain schedules and scheduler . 24
7.1.1 Introduction . 24
7.1.2 Example 1 . 25
7.1.3 Example 2 . 28
8 Restoration of functions/communication after IED restart (power cycle) . 31
8.1 Functional description . 31

8.2 Priorities . 31
8.3 Stored and non-stored data. 31
Bibliography . 33

Figure 1 – Communication vs. application layer model for controls . 9
Figure 2 – Different levels of control authority (example) . 12
Figure 3 – Single-phase monitoring of the CB position . 17
Figure 4 – Examples of use of Health and EEHealth in models . 23
Figure 5 – FSCH and FSCC LN class . 24
Figure 6 – State Machine . 25
Figure 7 – Relation between schedule controller, schedules and entity scheduled . 25
Figure 8 – Use case charging architecture . 26
Figure 9 – LN instances and relationships in example 1 . 27
Figure 10 – Timelines associated to the example 1 . 27
Figure 11 – LN instances and relationships in example 2 . 28
Figure 12 – Timelines associated to the example 2 . 30

Table 1 – Dependence of checking Interlocking (IL) conditions on the control command
and on the server configuration . 10
Table 2 – Dependence of checking synchronism (CS) conditions on the control
command and on the server configuration . 11
Table 3 – Use case 1 definition . 14
Table 4 – Example of fixed rules: Boolean OR out of two input signals . 19
Table 5 – Health in IEC 61850-7-4 . 21
Table 6 – Examples for stored and non-stored data for restart . 32

– 4 – IEC TR 61850-7-5:2021  IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMMUNICATION NETWORKS AND SYSTEMS
FOR POWER UTILITY AUTOMATION –

Part 7-5: IEC 61850 Modelling concepts

FOREWORD
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IEC TR 61850
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