As 61850.9.1-2005 Communication Networks and Systems in Substations Specific Communication Service Mapping (S

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AS 61850.9.12005IEC 61850-9-1, Ed.1 (2003)

Australian Standard

Communication networks and systemsin substationsPart 9.1: Specific communicationservice mapping (SCSM)Sampledvalues over serial unidirectionalmultidrop point to point link

AS6185

0.9.12005


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This Australian Standard was prepared by Committee EL-050, Power SystemControl and Communication. It was approved on behalf of the Council of StandardsAustralia on 15 August 2005.This Standard was published on 20 September 2005.

The following are represented on Committee EL-050:

Australian Electrical and Electronic Manufacturers Association

Commerce Queensland

Energy Networks Association

Engineers Australia

Keeping Standards up-to-date

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Alternatively, the printed Catalogue provides information current at 1 January eachyear, and the monthly magazine, The Global Standard, has a full listing of revisionsand amendments published each month.

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We also welcome suggestions for improvement in our Standards, and especiallyencourage readers to notify us immediately of any apparent inaccuracies orambiguities. Contact us via email at [email protected], or write to the ChiefExecutive, Standards Australia, GPO Box 476, Sydney, NSW 2001.

This Standard was issued in draft form for comment as DR 05212.


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AS 61850.9.12005

Australian Standard

Communication networks and systemsin substationsPart 9.1: Specific communicationservice mapping (SCSM)Sampledvalues over serial unidirectionalmultidrop point to point link

First published as AS 61850.9.12005.

COPYRIGHT

Standards Australia

All rights are reserved. No part of this work may be reproduced or copied in any form or by

any means, electronic or mechanical, including photocopying, without the written

permission of the publisher.

Published by Standards Australia GPO Box 476, Sydney, NSW 2001, Australia

ISBN 0 7337 6861 X


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ii

PREFACE

This Standard was prepared by the Standards Australia Committee EL-050, Power System

Control and Communication.

The objective of this Standard is to provide users and manufacturers of substation automation

equipment with specification of the specific communication service mappings for the

communication between bay and process level and it specifies a mapping on a serial

unidirectional multidrop point to point link.

This Standard is identical with, and has been reproduced from IEC 61850-9-1, Ed.1 (2003),

Communication networks and systems in substations Part 9-1: Specific communication service

mapping (SCSM) Sampled values over serial unidirectional multidrop point to point link.

This Standard is Part of Communication networks and systems in substations. The series

consists of the following:

Part 1: Introduction and overview

Part 2: Glossary

Part 3: General requirements

Part 4: System and project management

Part 5: Communication requirements for functions and device models

Part 6: Configuration description language for communication in electrical substations

related to IEDs

Part 7.1: Basic communication structure for substation and feeder equipmentPrinciples

and modelsPart 7.2: Basic communication structure for substation and feeder equipmentAbstract

communication service interface (ACSI)

Part 7.3: Basic communication structure for substation and feeder equipmentCommon

data classes

Part 7.4: Basic communication structure for substation and feeder equipmentCompatible

logical node classes and data classes

Part 8.1: Specific communication service mapping (SCSM)Mappings to MMS

(ISO/IEC 9506-1 and ISO/IEC 9506-2) and to ISO/IEC 8802-3

Part 9.1: Specific communication service mapping (SCSM)Sampled values over serialunidirectional multidrop point to point link (this Standard)

Part 9.2: Specific communication service mapping (SCSM)Sampled values over

ISO/IEC 8802-3

As this Standard is reproduced from an International Standard, the following applies:

(a) Its number does not appear on each page of text and its identity is shown only on the

cover and title page.

(b) In the source text IEC 61850-9-1 should read AS 61850.9.1.

(c) A full point should be substituted for a comma when referring to a decimal marker.

(d) Any French text on figures should be ignored.


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ii i

The terms normative and informative are used to define the application of the annex to

which they apply. A normative annex is an integral part of a standard, whereas an informative

annex is only for information and guidance.


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iv

CONTENTS

Page

1 Scope .............................................................................................................................. 1

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

3 Terms and definitions ....................................................................................................... 3

4 Abbreviations ... ... ... ... ..... ... ..... ... ..... ... ..... ..... ... ..... ... ..... ... ..... ... ..... ... ..... ..... ... ..... ... ..... ... .... . 3

5 Principle of mapping to the serial unidirectional multidrop point to point link.................... 3

5.1 Communication stack .............................................................................................. 4

5.2 Restrictions............................................................................................................. 6

6 Mapping of common types ............................................................................................... 6

6.1 Object name ........................................................................................................... 6

6.2 Object reference ..................................................................................................... 6

7 Mapping of the model for transmission of sampled values using multicast........................ 77.1 Mapping of the multicast sampled values services .................................................. 7

7.2 Mapping of the update of the sampled value buffer ................................................. 7

7.3 Additional def init ions for the transmission of sampled analogue values ... ..... ... ..... ... 8

8 Mapping of the common data classes............................................................................. 10

8.1 Overview............................................................................................................... 10

8.2 Additional def init ions for the mapping of the common data classes ... ... ... ... ... ... ... .. 10

Annex A (normative) Definition of data set instances and related multicast sampledvalue control instances .................................................................................................. 13

Annex B (informative) Calculation of required bandwidth ... ... ... ... ... ... ..... ... ..... ... ..... ... ..... ..... . 15

Annex C (informative) Def init ions of logical node instance names and data namesrelated to the data sets .................................................................................................. 17

Annex D (informative) Electronic transformers block diagram and configurationexample ......................................................................................................................... 21


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v

INTRODUCTION

This part of IEC 61850 applies to electronic current and voltage transformers (ECT and EVT)with a digital output via a merging unit , for use with electronic measuring instruments andelectronic protective devices.

The transformer technology can be based on optical arrangements equipped with electroniccomponents, on air core coils (with or without a built-in integrator) or, on iron core coils

with integrated burden and used as a current to vo ltage converter, alone or equipped withelectronic components.

For digital output, this standard takes into account a point to point connection from themerging unit to electronic measuring instruments and electronic devices.

This mapping allows interoperability between devices from different manufacturers.

This standard does not specify individual implementations or products, nor does it constrainthe implementation of entities and interfaces within a computer system. This standardspecifies the externally visible functionality of implementations.

Reading Guide

The point to point transformer interface as defined here is based on the concepts described inIEC 60044-8. This standard extends this concept and proposes an alternative link layer toprovide a solution for transmitting sampled measured values via Ethernet based interfaces.For the definition and measurement of the accuracy, synchronisation methods, data rates etc.of the transformers, refer to IEC 60044-8.

This document can best be understood if the reader is thoroughly familiar with Parts 7-1, 7-2,

7-3 and 7-4 of this Standard.

No explanations to the ACSI services are given in this part of the standard. For detailedinformation about the use of the ACSI services, refer to IEC 61850-7-2.


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vi

NOTES


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www.standards.com.au Standar ds Aus tralia

1

STANDARDS AUSTRALIA

Australian Standard

Communication networks and systems in substationsPart 9.1: Specific communication service mapping (SCSM)Sampled

values over serial unidirectional multidrop point to point link

1 Scope

This part of IEC 61850 specifies the specific communication service mappings for thecommunication between bay and process level and it specifies a mapping on a serialunidirectional multidrop point to point link in accordance with IEC 60044-8. This part ofIEC 61850 specifies a mapping of the abstract service for the transmission of sampled values(as defined in IEC 61850-7-2) on a serial unidirectional multidrop point to point link inaccordance with IEC 60044-8. It applies to the communication between merging units ofelectronic current (ECT) or voltage-transformers (EVT) and bay devices such as protectionrelays. If higher requirements on sampling rate, further sampled measured value data sets inaddition to the universal data set, inter-bay communication and synchronisation apply, these

will be covered by IEC 61850-9-2. F igure 1 shows the schematics of this interface.

Merging unit

Line protection Bay controller

Ethernetcontroller

Multipleports

Ethernetcontroller

Ethernetcontroller

Proprietary

link

Proprietary

link

Serial unidirectional

multidrop point to point link

Synchronisation, monitoring,test and configuration

interfaces

Binary inputs

IEC 812/03

Figure 1 Example for the use of the serial unidirectional multidrop point to point link


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As 61850.9.1-2005 Communication Networks and Systems in Substations Specific Communication Service Mapping (S