Communication networks and systems for power utility automation - Part 10-3: Functional testing of IEC 61850 systems

IEC TR 61850-10-3:2022(E), which is a technical report, is applicable to testing of applications within substations. It is intended to give practical guidelines to perform the stages of quality assurance defined in IEC 61850-4:2011. However, while the quality assurance in that document begins with the IED manufacturer development stage and focuses on the role of the system integrator this document focuses on end-user requirement fulfilment.
The report may be useful to users applying IEC 61850 to other domains, however testing of IEC 61850 systems outside the substation domain is not within the scope of this document.
This document describes:
• A methodical approach to the verification and validation of a substation solution
• The use of IEC 61850 resources for testing in Edition 2.1
• Recommended testing practices for different use cases
• Definition of the process for testing of IEC 61850 based devices and systems using communications instead of hard wired system interfaces (ex. GOOSE and SV instead of hardwired interfaces)
• Use cases related to protection and control functions verification and testing
This document does not cover the conformance testing of devices according to IEC 61850-10 or methodologies for testing of abstract device independent functions.

General Information

Status
Published
Publication Date
07-Feb-2022
Current Stage
PPUB - Publication issued
Completion Date
08-Feb-2022
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IEC TR 61850-10-3
Edition 1.0 2022-02
TECHNICAL
REPORT
colour
inside
Communication networks and systems for power utility automation –
Part 10-3: Functional testing of IEC 61850 systems
IEC TR 61850-10-3:2022-02(en)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC TR 61850-10-3
Edition 1.0 2022-02
TECHNICAL
REPORT
colour
inside
Communication networks and systems for power utility automation –
Part 10-3: Functional testing of IEC 61850 systems
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.200 ISBN 978-2-8322-1075-7

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – IEC TR 61850-10-3:2022 © IEC 2022
CONTENTS

FOREWORD ........................................................................................................................... 6

INTRODUCTION ..................................................................................................................... 8

1 Scope .............................................................................................................................. 9

2 Normative references ...................................................................................................... 9

3 Terms, definitions, abbreviated terms and acronyms ..................................................... 10

3.1 Terms and definitions ............................................................................................ 10

3.1.1 Testing types ................................................................................................. 10

3.2 Abbreviated terms and acronyms .......................................................................... 13

4 Testing-related features in IEC 61850 ............................................................................ 13

4.1 General ................................................................................................................. 13

4.2 Test features defined in IEC 61850 ....................................................................... 13

4.2.1 General ......................................................................................................... 13

4.2.2 Simulation based testing in substations under normal operation .................... 14

4.2.3 Mode and behavior of functions ..................................................................... 16

4.2.4 Logical devices management hierarchy ......................................................... 18

4.2.5 Processing of information .............................................................................. 21

4.2.6 Blocking of information .................................................................................. 23

4.2.7 Changing the information source (input reference) for testing ........................ 25

4.2.8 Substitution of information ............................................................................. 26

4.2.9 Use of testing related features ....................................................................... 26

5 Testing of Protection, Automation and Control Devices and Systems ............................. 28

5.1 General ................................................................................................................. 28

5.2 Test system requirements ..................................................................................... 29

6 Test methods, practices and needs ............................................................................... 30

6.1 General ................................................................................................................. 30

6.2 Testing requirements for IEC 61850 based systems .............................................. 30

6.3 The V-Model ......................................................................................................... 31

6.3.1 General ......................................................................................................... 31

6.3.2 Unit testing .................................................................................................... 31

6.3.3 Integration or subsystem testing .................................................................... 32

6.3.4 System testing ............................................................................................... 32

7 Testing use cases .......................................................................................................... 32

7.1 General ................................................................................................................. 32

7.2 Distributed Breaker Failure Protection Scheme ..................................................... 33

7.2.1 General ......................................................................................................... 33

7.2.2 Use case description ..................................................................................... 33

7.2.3 Breaker Failure Protection Scheme Interfaces ............................................... 37

7.3 Distributed Select Before Operate ......................................................................... 38

7.3.1 General ......................................................................................................... 38

7.3.2 Select Before Operate Scheme Components ................................................. 38

7.3.3 Select Before Operate Scheme Interfaces ..................................................... 41

7.3.4 Select Before Operate Scheme Behavior ....................................................... 42

7.3.5 Single line diagram ........................................................................................ 44

8 Test sequences for the use cases.................................................................................. 46

8.1 Breaker failure protection testing .......................................................................... 46

8.1.1 General ......................................................................................................... 46

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IEC TR 61850-10-3:2022 © IEC 2022 – 3 –

8.1.2 Normal sequence ........................................................................................... 46

8.1.3 Fault sequence .............................................................................................. 47

8.1.4 Setting the test mode and the simulation state of the line protection

function ......................................................................................................... 48

8.1.5 Setting the test mode and the simulation state of the breaker failure

function ......................................................................................................... 49

8.1.6 Setting the test mode and the simulation state of the breaker function ........... 50

8.1.7 Setting the test mode of the bus bar protection function ................................. 51

8.1.8 Testing the line protection IED ....................................................................... 52

8.1.9 Testing the breaker failure IED A interface .................................................... 54

8.1.10 Testing the breaker IED A interface ............................................................... 56

8.1.11 Testing the breaker failure function End-to-End ............................................. 58

8.2 Select Before Operate Scheme Testing................................................................. 61

8.2.1 General ......................................................................................................... 61

8.2.2 Unit testing .................................................................................................... 61

8.2.3 Subsystem (Interface) testing ........................................................................ 69

8.2.4 System (End-to-End) testing .......................................................................... 70

9 Modeling requirements related to testing in IEC 61850 .................................................. 75

10 Object modeling of test systems .................................................................................... 75

11 Engineering of the test system ....................................................................................... 77

12 Impact of the testing system on the substation LAN traffic ............................................. 77

13 Functional and cyber security considerations ................................................................. 78

14 Remote testing .............................................................................................................. 79

Annex A (informative) Introduction to the used UML notation ............................................... 80

A.1 General ................................................................................................................. 80

A.2 Component diagram .............................................................................................. 80

A.3 Sequence diagram ................................................................................................ 80

Annex B (informative) Requirements for extensions ............................................................. 83

B.1 Requirements for extensions in IEC 61850-7-1 ..................................................... 83

B.2 Requirements for extensions in IEC 61850-7-3 ..................................................... 83

B.3 Requirements for extensions in IEC 61850-7-4 ..................................................... 84

Figure 1 – Data used for receiving simulation signals (IEC 61850-7-1 Fig. 40) ...................... 15

Figure 2 – IED with multiple process interfaces ..................................................................... 15

Figure 3 – Processing of test signals (Part 7-1, Figure 42) .................................................... 18

Figure 4 – Nesting of logical devices representing the functional hierarchy ........................... 19

Figure 5 – Use of GrRef in the modelling of nested logical devices ....................................... 20

Figure 6 – Management hierarchy of nested logical devices .................................................. 20

Figure 7 – Processing of the data by a LN depending on the LN behaviour and the

quality attribute of input data ................................................................................................. 22

Figure 8 – Data used for logical node inputs/outputs blocking: IEC 61850-7-1:2011,

Figure 39) ............................................................................................................................. 24

Figure 9 – Example of input signals used for testing (IEC 61850-7-1:2011, Figure 41) .......... 25

Figure 10 – Use of InRef for LN test ...................................................................................... 26

Figure 11 – Quality assurance stages of IEC 61850-4:2011 .................................................. 28

Figure 12 – Testing stages for site acceptance test as defined in IEC 61850-4:2011 ............ 29

Figure 13 – V-Model used for system engineering ................................................................. 31

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– 4 – IEC TR 61850-10-3:2022 © IEC 2022

Figure 14 – Single line diagram according to IEC 81346 ....................................................... 34

Figure 15 – System components (Static) ............................................................................... 36

Figure 16 – System components (Dynamic) .......................................................................... 37

Figure 17 – Select Before Operate Scheme .......................................................................... 39

Figure 18 – Component decomposition of Select Before Operate Scheme ............................ 40

Figure 19 – Allocated interfaces for Select Before Operate Scheme – SLD ........................... 41

Figure 20 – Allocated interfaces for Select Before Operate Scheme...................................... 42

Figure 21 – Simplified SBO scheme behaviour ...................................................................... 44

Figure 22 – Single line diagram ............................................................................................ 45

Figure 23 – Normal sequence ............................................................................................... 47

Figure 24 – Fault sequence .................................................................................................. 48

Figure 25 – Line protection function: Setting the mode and the simulation state .................... 49

Figure 26 – Breaker failure function: Setting the mode and the simulation state .................... 50

Figure 27 – Breaker function: Setting the mode and the simulation state............................... 51

Figure 28 – Bus bar protection function: Setting the mode .................................................... 51

Figure 29 – Line protection IED A interface testing ............................................................... 53

Figure 30 – Interfaces between test system and tested IED for testing of line

protection function ................................................................................................................ 54

Figure 31 – Breaker failure IED A interface testing ................................................................ 55

Figure 32 – Interfaces between test system and tested IED for testing of breaker

failure protection function ...................................................................................................... 56

Figure 33 – Breaker IED A interface testing .......................................................................... 57

Figure 34 – Interfaces between test system and tested IED for testing of breaker

control function ..................................................................................................................... 58

Figure 35 – Breaker failure function end to end testing ......................................................... 60

Figure 36 – Interfaces between test system and tested IEDs for End-to-End testing of

breaker failure protection scheme ......................................................................................... 61

Figure 37 – Unit test of TVTR LN – simplified ....................................................................... 62

Figure 38 – Unit test of TVTR LN .......................................................................................... 63

Figure 39 – Unit test of XCBR LN – Scenario 1 – simplified .................................................. 64

Figure 40 – Unit test of XCBR LN – Scenario 1 ..................................................................... 66

Figure 41 – Unit test of XCBR LN – Scenario 2 – simplified .................................................. 67

Figure 42 – Unit test of XCBR LN – Scenario 2 ..................................................................... 68

Figure 43 – Interface test of CSWI – XCBR LNs .................................................................... 70

Figure 44 – End-to-end test of SBO scheme ......................................................................... 72

Figure 45 – End-to-end test (positive) ................................................................................... 73

Figure 46 – End to end test (negative #1) ............................................................................. 74

Figure 47 – End to end test (negative #2) ............................................................................. 74

Figure 48 – End to end test (negative #3) ............................................................................. 75

Figure 49 – Simplified object model of test device as an IED Simulator ................................. 76

Figure 50 – Simplified object model of test device as generic Simulator ................................ 76

Figure 51 – Testing of transformer differential protection ...................................................... 78

Figure 52 – Remote test system ............................................................................................ 79

Figure A.1 – Example of a component diagram ..................................................................... 80

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IEC TR 61850-10-3:2022 © IEC 2022 – 5 –

Figure A.2 – Sequence diagram example .............................................................................. 81

Table 1 – LD/LN Mode/Beh inheritance ................................................................................. 17

Table 2 – Table A.2 of IEC 61850-7-4:2010/AMD1:2020, Annex A summarizes the

processing principles ............................................................................................................ 23

Table 3 – Applicable modes for different types of tests ......................................................... 27

Table A.1 – Description of the component diagram UML elements ........................................ 80

Table A.2 – Description of UML elements in a sequence diagram ......................................... 82

Table B.1 –Examples of accuracy attributes .......................................................................... 84

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– 6 – IEC TR 61850-10-3:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMMUNICATION NETWORKS AND
SYSTEMS FOR POWER UTILITY AUTOMATION –
Part 10-3: Functional testing of IEC 61850 systems
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international

co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,

Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their

preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with

may participate in this preparatory work. International, governmental and non-governmental organizations liaising

with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for

Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

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any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent

rights. IEC shall not be held responsible for identifying any or all such patent rights.

IEC TR 61850-10-3, which is a Technical Report, has been prepared by IEC technical

committee 57: Power systems management and associated information exchange.
The text of this Technical Report is based on the following documents:
Draft Report on voting
57/2199/DTR 57/2328/RVDTR

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this Technical Report is English.

A list of all parts in the IEC 61850 series, published under the general title Communication

networks and systems for power utility automation, can be found on the IEC website.

---------------------- Page: 8 ----------------------
IEC TR 61850-10-3:2022 © IEC 2022 – 7 –

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under webstore.iec.ch in the data related to the

specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it

contains colours which are considered to be useful for the correct understanding of its

contents. Users should therefore print this document using a colour printer.
---------------------- Page: 9 ----------------------
– 8 – IEC TR 61850-10-3:2022 © IEC 2022
INTRODUCTION

The growing success of the IEC 61850 series calls for guidelines for testing of substations

implementing this standard. This Technical Report aims at producing a practical guide for

protection, automation and control (PAC) engineers on best practise for testing of the latest

amended IEC 61850 based devices and systems.

Since the release of the first edition of the IEC 61850 standard in 2002-2005 thousands of

substations have been built making use of the new multi-part standard. Most of those systems

are more integrated and complex than the previously deployed, making use of multi-function

capable IEDs and the rich feature set of IEC 61850. Especially the sending and receiving of

protection trips via GOOSE messaging control commands/indications, monitoring and time

synchronisation information over the same shared equipment or network will need to drive

changes to existing test methods and practices as many of the traditional test boundaries have

changed.

Despite the large number of commissioned IEC 61850 substations, considerable uncertainty

among end-users (system integrators and power utilities) regarding the correct testing

procedures still exists. Devices implemented according to the first edition of the standard also

utilized a limited part of the test related functionality in the standard. Much of the functionality

included in IEC 61850 to allow efficient, functional oriented testing has been clarified and

extended in the second edition of IEC 61850-6, IEC 61850-7-1 to IEC 61850-7-4, IEC 61850-8-

1 and IEC 61850-9-2. Therefore, there is a need to help the industry by describing the methods

and principles for testing the IEC 61850 based applications.

This Technical Report provides insight into the changing requirements and practice of testing

following the introduction of IEC 61850 based devices and systems. One example is the

disappearance of so-called 'hardwired' connections between substation automation devices.

These connections are replaced by communication networks and this means that traditional

simulation and isolation of signals for the purpose of testing is no longer possible.

---------------------- Page: 10 ----------------------
IEC TR 61850-10-3:2022 © IEC 2022 – 9 –
COMMUNICATION NETWORKS AND
SYSTEMS FOR POWER UTILITY AUTOMATION –
Part 10-3: Functional testing of IEC 61850 systems
1 Scope

This part of IEC 61850, which is a technical report, is applicable to testing of applications within

substations. It is intended to give practical guidelines to perform the stages of quality assurance

defined in IEC 61850-4:2011. However, while the quality assurance in that document begins

with the IED manufacturer development stage and focuses on the role of the system integrator

this document focuses on end-user requirement fulfilment.

The report may be useful to users applying IEC 61850 to other domains, however testing of

IEC 61850 systems outside the substation domain is not within the scope of this document.

This document describes:

• A methodical approach to the verification and validation of a substation solution

• The use of IEC 61850 resources for testing in Edition 2.1
• Recommended testing practices for different use cases

• Definition of the process for testing of IEC 61850 based devices and systems using

communications instead of hard wired system interfaces (ex. GOOSE and SV instead of

hardwired interfaces)
• Use cases related to protection and control functions verification and testing

This document does not cover the conformance testing of devices according to IEC 61850-10

or methodologies for testing of abstract device independent functions.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies.

For undated references, the latest edition of the referenced document (including any

amendments) applies.

IEC 61850-4:2011, Communication networks and systems for power utility automation - Part 4:

System and project management

IEC 61850-6:2009, Communication networks and systems for power utility automation - Part 6:

Configuration description language for communication in electrical substations related to IEDs

IEC 61850-6:2009/AMD1:2018
...

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