IEC TR 62357:2003

TECHNICAL IEC
REPORT
TR 62357
First edition
2003-07
Power system control and
associated communications –
Reference architecture for object models,
services and protocols
Reference number
IEC/TR 62357:2003(E)
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TECHNICAL IEC
REPORT
TR 62357
First edition
2003-07
Power system control and
associated communications –
Reference architecture for object models,
services and protocols
 IEC 2003  Copyright - all rights reserved
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International Electrotechnical Commission
Международная Электротехническая Комиссия
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– 2 – TR 62357  IEC:2003(E)
CONTENTS
FOREWORD . 3

0 Introduction. 5

Trend toward integration of planning and control systems. 5

1 General . 6

1.1 Scope and purpose of reference architecture. 6

1.2 Reference documents. 9

2 IEC Technical Committee 57 Standards. 9

2.1 IEC 60870-5 Standards from IEC Technical Committee 57 Working group 3 . 9
2.2 IEC 60870-6 Standards from IEC Technical Committee 57 Working group 7 .10
2.3 IEC 61334 Standards from IEC Technical Committee 57 Working group 9 .11
2.4 IEC 61850 Standards from IEC Technical Committee 57 Working groups 10 to 12 . 11
2.5 Future IEC 61970 Standards from IEC Technical Committee 57 Working group 13 . 12
2.6 IEC 61968 Standards from IEC Technical Committee 57 Working group 14 .15
2.7 IEC Technical Committee 57 Working group 15 Standards for Data and
Communications Security .17
2.8 IEC Technical Committee 57 Working group 16 Standards for a Framework for
Deregulated Energy Market Communications.17
3 Reference Architecture .17
3.1 SCADA Interfaces.19
3.2 Inter-CC Data Links .19
3.3 EMS Applications.20
3.4 DMS Applications and External IT Applications.20
3.5 Substation/Field Devices .20
4 Data Modeling in IEC Technical Committee 57.21
4.1 Common Information Model (CIM) and Component Interface Specifications (CIS).21
4.2 IEC 61850 ACSI and Logical Devices .24
5 Strategic Use of Reference Architecture for Harmonization and New Work Items.26
5.1 Adoption of Reference Architecture .26
5.2 Use of Common Object Modeling Language .26
5.3 Harmonization at Model Boundaries .26
5.4 Resolution of Model Differences .27
6 Conclusion.27

Annex A Objects Modeled within IEC Technical Committee 57 .28
Annex B EPRI Utility Communications Architecture (UCA) .29
Figure 1 – Coordination among standards activities . 7
Figure 2 – Application of Technical Committee 57 Standards to a power system . 8
Figure 3 – EMS-API Standards as an Integration Framework .14
Figure 4 – SCADA Data Interfaces .15
Figure 5 – Distribution Management System with IEC 61968 compliant interface
architecture.16
Figure 6 – Technical Committee 57 Reference Architecture .18
Figure 7 – Common Information Model (CIM) Packages .22
Figure 8 – ACSI Client/Server Model.25

TR 62357  IEC:2003(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
POWER SYSTEM CONTROL AND ASSOCIATED COMMUNICATIONS –

Reference architecture for object models, services and protocols

FOREWORD
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The main task of IEC technical committees is to prepare International Standards. However, a
technical committee may propose the publication of a technical report when it has collected
data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
IEC 62357, which is a technical report, has been prepared by IEC technical committee 57:
Power system control and associated communications.
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
57/611A/DTR 57/627/RVC
Full information on the voting for the approval of this technical report can be found in the
report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – TR 62357  IEC:2003(E)
The committee has decided that the contents of this publication will remain unchanged until
2004 . At this date, the publication will be

• reconfirmed;
• withdrawn;
• replaced by a revised edition, or

• amended.
___________
IEC Technical Committee 57 will revise this document immediately in order to accommodate comments
received during the voting process with the goal of reflecting recent developments.

TR 62357  IEC:2003(E) – 5 –
0 Introduction
IEC Technical Committee 57 develops standards for electric power system control and

associated telecommunications in the areas of generation, transmission and distribution real-

time operations and planning. The primary purpose of this Technical Report is to provide a

reference architecture to show how the various standardisation activities within IEC Technical

Committee 57 relate to each other and how they individually and collectively contribute to

meeting the objectives of IEC Technical Committee 57. A second objective is to develop a
strategy to combine and harmonize the work of these various activities to help facilitate a
single, comprehensive plan for deployment of these standards in product development and

system implementations.
The need for this framework is motivated by at least two major factors:
1. There are multiple independent standard initiatives that need to be coordinated and
harmonized to minimize the need for data transformation to exchange data between
systems using these various standards.
2. There is a need to have a comprehensive vision of how to deploy these standards for
actual system implementation and integration efforts.
There are several different initiatives within IEC Technical Committee 57, each dealing with a
selected part of the real-time operations and planning. Each has a specific objective and may
have sufficient breadth of scope to provide the bulk of the relevant standards needed for
product vendors to develop products based on those standards.
Trend toward integration of planning and control systems
In today’s utility enterprise where information exchange between the various generation,
transmission and distribution management systems and other IT systems is not only desirable
but necessary in most cases, each system plays the role of either supplier or consumer of
information, or more typically both. That means that both data semantics and syntax need to
be preserved across system boundaries, where system boundaries in this context are
interfaces where data is made publicly accessible to other systems or where requests for data
residing in other systems are initiated. In other words, the what of the information exchange is
actually much more important for system integration purposes than how the data is
transported between systems.
Most previous efforts to define system architectures have dea
...