IEC TR 62939-1:2014

IEC TR 62939-1 ®
Edition 1.0 2014-11
TECHNICAL
REPORT
colour
inside
Smart grid user interface –
Part 1: Interface overview and country perspectives
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing more than 30 000 terms and
Technical Specifications, Technical Reports and other definitions in English and French, with equivalent terms in 14
documents. Available for PC, Mac OS, Android Tablets and additional languages. Also known as the International
iPad. Electrotechnical Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a More than 55 000 electrotechnical terminology entries in
variety of criteria (reference number, text, technical English and French extracted from the Terms and Definitions
committee,…). It also gives information on projects, replaced clause of IEC publications issued since 2002. Some entries
and withdrawn publications. have been collected from earlier publications of IEC TC 37,

77, 86 and CISPR.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: csc@iec.ch.
IEC TR 62939-1 ®
Edition 1.0 2014-11
TECHNICAL
REPORT
colour
inside
Smart grid user interface –
Part 1: Interface overview and country perspectives

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XF
ICS 33.200 ISBN 978-2-8322-1913-3

– 2 – IEC TR 62939-1:2014 © IEC 2014
CONTENTS
FOREWORD . 8
0 Introduction . 10
0.1 High-level definition of Smart Grid user interface (SGUI). 10
0.2 PC 118 history . 10
0.3 Relation of IEC PC 118 to other IEC technical committees . 10
0.4 Report overview . 11
0.5 Key recommendations and findings . 11
1 Scope . 12
2 Smart Grid user interface overview . 12
2.1 SGUI – Consensus perspective . 12
2.2 Inter-domain interoperability . 14
2.2.1 General . 14
2.2.2 Agreement at the interface – a contract . 14
2.2.3 Boundary of authority . 14
2.2.4 Decision making in very large networks . 14
2.2.5 The role of standards . 15
2.3 Smart Grid user applications . 15
2.3.1 General . 15
2.3.2 Demand response. 15
2.3.3 Other SGUI applications . 20
2.4 SGUI functional requirements . 20
2.5 Architecture . 22
2.6 Actors . 24
2.6.1 Overview . 24
2.6.2 Customer domain characteristics . 24
2.6.3 Grid-side, customer-side, and SGUI actors . 24
2.7 Quality requirements . 26
2.7.1 General . 26
2.7.2 Security and privacy . 27
2.7.3 Scalability and performance . 27
2.7.4 Maintainability . 28
3 Country actions and perspective on Smart Grid user interface . 28
3.1 General . 28
3.2 Overview of country experiences . 28
3.2.1 China perspective . 28
3.2.2 U.S. perspective . 29
3.2.3 European perspective . 31
3.2.4 France perspective . 32
3.2.5 Korea perspective . 36
3.2.6 Japan perspective . 37
3.2.7 India perspective . 37
3.3 Use cases from PC 118 member countries . 38
3.3.1 General . 38
3.3.2 China use cases . 38
3.3.3 Korea use cases . 39
3.3.4 Japan use cases . 39

3.3.5 France use cases . 39
3.3.6 India use cases . 40
3.3.7 U.S. use cases . 40
3.4 Use case analysis . 41
3.4.1 General . 41
3.4.2 Service and control interactions . 41
3.4.3 Use case taxonomy . 42
3.4.4 Analysis and classification of use cases . 42
3.4.5 Summary of use case analysis . 44
3.5 Special considerations . 44
3.5.1 General . 44
3.5.2 Meter interactions . 44
3.5.3 Electric vehicles and other storage . 45
4 Smart grid user interface standards . 45
4.1 General . 45
4.2 Overview of existing standards . 45
4.3 Standards gap context . 50
4.3.1 General . 50
4.3.2 Standards gap analysis procedure . 50
4.3.3 Use case classification system . 51
4.4 Use case classes and relevant standards . 52
4.4.1 General . 52
4.4.2 UCC 1—Interact with markets . 52
4.4.3 UCC 2—Convey price information. 55
4.4.4 UCC 3—Ancillary services . 58
4.4.5 UCC 4—DR & DER requests and supporting services. 61
4.4.6 UCC 5—Impending power failure or instability . 64
4.4.7 UCC 6—Directed interaction and direct load control . 66
4.4.8 UCC 7—Historical, present and future projection information . 69
4.4.9 UCC 8—Monitoring and energy efficiency analysis . 71
4.5 Smart Grid user interface standards gap analysis conclusions . 73
5 Recommendations for IEC SGUI standards development . 74
5.1 General . 74
5.2 OpenADR 2.0 . 74
5.3 OASIS Energy Interoperation . 75
5.4 Smart Energy SEP 2.0 . 75
Annex A (informative) IEC establishment and history of PC 118. 76
Annex B (informative) SGUI perspective – More details . 81
B.1 General . 81
B.2 European standardization for Smart Grid realization in buildings . 81
B.3 DR through smart meter infrastructure (France) . 84
Annex C (informative) Use cases . 87
C.1 General . 87
C.2 China use cases . 87
C.2.1 CN01 – Use case of generic use cases . 87
C.2.2 CN02 – Use case of demand response . 87
C.2.3 CN03 – Use case of energy efficiency . 87
C.2.4 CN04 – Use case of distributed energy resource . 88

– 4 – IEC TR 62939-1:2014 © IEC 2014
C.2.5 CN05 – Use case of electric vehicle charging . 88
C.2.6 CN06 – Use case of load management . 88
C.3 Korea use cases . 88
C.4 Japan use cases . 90
C.4.1 General . 90
C.4.2 JP01 – Control battery via home energy management system (HEMS) . 90
C.4.3 JP02 – Control distributed energy resources (DER) via home energy
management system (HEMS). 91
C.4.4 JP03 – Control energy consumption with smart appliances by building
energy management system (BEMS) . 91
C.4.5 JP04 – Control energy consumption with smart appliances by
community EMS . 91
C.4.6 JP05 – Control energy consumption with smart appliances by energy
provider . 92
C.4.7 JP06 – Control energy consumption via home energy management
system (HEMS) with smart appliances . 92
C.4.8 JP07 – Peak shift contribution by battery aggregation (virtual energy
storage) . 92
C.4.9 JP08 – Control of smart home appliances based on price information by
time slot . 92
C.4.10 JP09 – Control of smart home appliances in response to power saving
request from electric power supplier . 93
C.4.11 JP10 – Control of smart home appliance before power cut . 93
C.4.12 JP11 – Control of smart home appliances in case of natural disaster . 94
C.5 France use cases . 94
C.5.1 General . 94
C.5.2 FR01 – Load control for electrical water heating tank coupled with on/off
peak tariff . 94
C.5.3 FR02 – Dynamic pricing of electricity and energy management. 95
C.5.4 FR03 – Managing a superseding tariff schedule (peak demand)
UC_PC_14 . 96
C.5.5 FR04 Handle a tariff event through managed equipment UC_PC_16 . 98
C.5.6 FR05 – Handling a tariff event by local intelligence UC_PC_17 . 99
C.6 India use cases . 100
C.6.1 IN01 – Energy efficiency . 100
C.6.2 IN02 – Demand response for peak load reduction . 101
C.6.3 IN03 – Home energy management . 101
C.6.4 IN04 – Building energy management . 101
C.6.5 IN05 – Local markets to enable consumer-prosumer open access
transactions . 102
C.6.6 IN06 – Deliver output reports of demand side equipment in standardized
data formats to users . 103
Annex D (informative) Standards . 104
D.1 Short summary of Clause 4 relevant standards . 104
D.1.1 General . 104
D.1.2 ISO/IEC 15067-3 . 104
D.1.3 ISO/IEC 15045 series . 104
D.1.4 ISO/IEC 18012 series . 104
D.1.5 ISO/IEC 14543 series . 104
D.1.6 ISO/IEC 14543-3 (EN 50090) KNX . 104
D.1.7 ISO/IEC 14908-1 . 105

D.1.8 ISO 16484-5 (ASHRAE/ANSI 135) . 105
D.1.9 ISO 17800 (ASHRAE/NEMA 201P) . 105
D.1.10 ISO/IEC 14762 . 106
D.1.11 ISO/IEC 29145 . 106
D.1.12 ISO/IEC 30100 . 106
D.1.13 IEC 61158-6 . 106
D.1.14 IEC 61400-25 series . 106
D.1.15 IEC 61588 . 107
D.1.16 IEC TR 61850-90-7 . 107
D.1.17 IEC TR 61850-90-8 . 108
D.1.18 IEC 61968 series . 108
D.1.19 IEC 61970 series . 109
D.1.20 IEC 62056 series . 109
D.1.21 IEC 62325 series . 109
D.1.22 IEC 62351 series . 110
D.1.23 IEC 62394 . 110
D.1.24 IEC 62480 . 110
D.1.25 IEC 62488 series . 110
D.1.26 IEC 62746 series . 111
D.1.27 IEC TS 62872 . 111
D.1.28 OASIS Energy Interoperation 1.0 . 111
D.1.29 OpenADR 2.0 (IEC PAS 62746-10-1) . 111
D.1.30 OASIS Energy Market Information Exchange . 111
D.1.31 OASIS WS-Calendar. 112
D.1.32 CENELEC EN 50491-12 . 112
D.1.33 IEEE P2030.5 Smart Energy Profile 2.0 . 112
D.1.34 ECHONET . 112
D.1.35 ANSI/CEA-2045, Modular Communication Interface . 113
D.1.36 AS/NZS 4755 . 113
D.1.37 IEEE 1547 . 113
D.2 Additional standards information . 114
D.2.1 General . 114
D.2.2 Standard: OASIS Energy Interoperation (EI) . 114
D.2.3 Standard: OpenADR 2.0 Profile Specification (OpenADR 2.0) . 116
D.2.4 Standard: Smart Energy Profile (SEP) 2.0 . 116
D.2.5 Standard: NAESB REQ.21: Energy Services Provider Interface (ESPI) . 119
D.2.6 Standard: ASHRAE/NEMA 201P Facility Smart Grid Information Model
(FSGIM) . 122
D.2.7 Standard: ANSI/CEA-2045: Modular Communication Interface . 123
Bibliography . 127

Figure 1 – High-level view of the SGUI architecture as interface (blue line) between
different domains . 13
Figure 2 – Levels of demand response interactions . 16
Figure 3 – Interactive demand response versus DLC . 18
Figure 4 – Information exchange through the SGUI between the grid (external service
providers) and users in the Customer Facility domain . 22
Figure 5 – High-level generic Smart Grid user interface architecture . 23
Figure 6 – NIST smart grid conceptual model (from NIST Framework 2.0) . 30

– 6 – IEC TR 62939-1:2014 © IEC 2014
Figure 7 – Architectural details of the EN 50491-12 CEM framework . 32
Figure 8 – Example COSEI architecture diagrams . 33
Figure 9 – Summary classification of submitted use cases with three interaction styles . 43
Figure 10 – Cross-tabulations of use cases by category with three interaction styles . 43
Figure 11 – Classification of standards in the following tables based on SGUI (Table 11),
grid-side domains (Table 12) and facility-side domain (Table 13) . 46
Figure 12 – Smart Grid architecture model . 51
Figure A.1 – Consensus reference drawing for PC 118 work relative to other TCs . 77
Figure A.2 – Top-down approach to identify industry expectations . 79
Figure A.3 – Questions to be addressed by PC 118 working groups leading to work plan . 79
Figure A.4 – Conceptual work plan for PC 118 . 80
Figure B.1 – Reference architecture for smart metering communications [19] . 81
Figure B.2 – Expanded smart metering reference architecture . 82
Figure B.3 – European functional architecture . 83
Figure B.4 – Reality of multiple HBES in market . 83
Figure B.5 – Common framework with one standard interface for mapping to any HBES . 84
Figure B.6 – DR through smart meter infrastructure, without (Internet) e-Box . 85
Figure B.7 – DR through smart meter infrastructure, with (Internet) e-Box. 85
Figure D.1 – Energy Interoperation directed interaction graph . 115
Figure D.2 – ESPI automated exchange use cases . 120
Figure D.3 – Overview of ESPI actors . 121
Figure D.4 – Modular interface concept . 125
Figure D.5 – CEA-2045 modular interface layers. 126

Table 1 – Correspondence between hardware components in smart homes and their
potential integrated functional components . 35
Table 2 – Korean framework domains and relation to SGUI . 37
Table 3 – Four regional demonstration tests in Japan . 37
Table 4 – China use case classification and use case summary . 38
Table 5 – Korea use case category table summary . 39
Table 6 – Japan use case category table summary . 39
Table 7 – France use case category table summary . 39
Table 8 – India use case category table summary . 40
Table 9 – U.S. use case category table summary . 41
Table 10 – SGUI functional use case classes (UCC) and descriptions . 42
Table 11 – Standards relevant to the SGUI . 46
Table 12 – Standards relevant to the grid-side of the SGUI . 47
Table 13 – Standards relevant to the facility-side of the SGUI . 49
Table 14 – Use case classes and relevant use cases . 52
Table 15 – Functional systems and relevant use cases . 52
Table 16 – Relevant standards for use case class 1. 54
Table 17 – Relevant standards for use case class 2. 56
Table 18 – Relevant standards for use case class 3. 59
Table 19 – Relevant standards for use case class 4. 62

Table 20 – Relevant standards for use case class 5. 65
Table 21 – Relevant standards for use case class 6. 67
Table 22 – Relevant standards for use case class 7. 70
Table 23 – Relevant standards for use case class 8. 72
Table A.1 – Chart used for capturing existing solutions during PC 118 meetings . 78
Table B.1 – DR infrastructure comparison – Services and roles . 86
Table C.1 – Summary of Japanese use cases . 90
Table C.2 – Summary of French use cases . 94

– 8 – IEC TR 62939-1:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SMART GRID USER INTERFACE –
Part 1: Interface overview and country perspectives

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
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between 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.
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 TR 62939-1, which is a technical report, has been prepared by IEC project committee 118:
Smart grid user interface.
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
118/40/DTR 118/42/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.
A list of all parts in the IEC 62939 series, published under the general title Smart grid user
interface, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

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.
– 10 – IEC TR 62939-1:2014 © IEC 2014
0 Introduction
0.1 High-level definition of Smart Grid user interface (SGUI)
The Smart Grid user interface (SGUI) is a logical, abstract cross-domain interface that
supports appropriately secure communications of information between an entity within the
customer domain (e.g., home or building energy management system, electrical load, energy
storage system or generation source) and an external service provider (e.g., utility,
aggregator, market or customer energy service provider). Devices and applications will
implement the SGUI between grid-side entities and customers for the purpose of facilitating
machine-to-machine communications. The SGUI needs to meet the needs of today’s grid
interactions (e.g., demand response, grid-aware energy management, electric vehicle (EV)
charging equipment interactions) and those of the future (e.g., retail market transactions).
In practice, the SGUI will potentially be one interface between multiple aggregation points,
both inside and outside of the customer facility. Implementations will have variations arising
from complex system inter-relationships: diverse customer business and usage models with
different types of equipment in different types of customer facilities controlled by a range of
energy management systems.
0.2 PC 118 history
In 2010, China proposed three new work proposals for IEC standards for Smart Grid user
interface. There was a long process (refer to Annex A for details of the history of the
establishment of Project Committee 118) of SMB and Strategy Group 3 (SG3) discussions and
interaction with different TCs who each were working on some standards efforts related to the
customer interface. Because many TCs have some connection to the SGUI, the Project
Committee approach was chosen with the goal of coordinating between TCs to move forward
toward effective standards. China was appointed secretary of PC 118 and the two Chinese
work proposals became two working groups within PC 118, each tasked to produce a
standard that would become deliverables of this temporary PC.
PC 118 members first met in Tianjin, China, in February 2012. At that meeting,
representatives from different TCs and NCs each presented standards work related to the
SGUI. Also at this meeting PC 118 members agreed to prepare a technical report covering the
definition of the SGUI, the national requirements for SGUI communications (use cases), and
an analysis of standards gaps between requirements and available standards. The end result
would be acknowledgement of available international standards, recommendations for
advancement of national standards and/or development of new standards to fill gaps.
PC 118 members recognized that standards exist for interactions between the traditional grid
domain and the customer domain. There are international and national standards covering
different parts of the interface. IEC TC 57 had just established a new working group (WG 21,
Interfaces and protocol profiles relevant to systems connected to the electrical grid) and other
TCs and WGs address meter interactions, industrial plant interactions, EV communications,
market information models, etc. PC 118 adopted the approach of preparing this technical
report, welcoming member countries and other IEC TCs to participate.
One may ask where Smart Grid stakeholders derive value. The industry will be best served by
rapid progress which in turn is enabled by use of established technologies which meet Smart
Grid user interface functional and quality requirements. This technical report presents the
work of PC 118 members to gather and report the requirements for the customer interface,
available standards, and identified standards gaps. Some national standards are
recommended for advancement in IEC.
0.3 Relation of IEC PC 118 to other IEC technical committees
According to the PC 118 Strategic Business Plan (SBP) (SMB/4823/R, June 2012), the scope
of PC 118 is to look at information exchange between the customer and the power grid from
the user’s point of view. PC 118 draws on the input of other IEC TCs to have a coherent IEC

perspective on the customer interface, developing a set of standards (or mapping to existing
standards) to ensure that IEC standards meet the needs of customer Smart Grid interactions.
In order to do this, PC 118 works with IEC TCs developing standards for the power grid and
within the customer domain.
IEC TC 57 is the manager of the IEC Common Information Model (CIM) and 61850 standards
that serve as the information models for power grid domain communications. TC 57/WG 21 is
specifically focused on the customer interface from the power grid point of view. IEC TC 13
developed the standards of the IEC 62056 Device Language Message Specification (DLMS)/
Companion Specification for Energy Metering (COSEM) suite [1] for the purposes of
electricity metering. The PC 118 SBP scope is, “Standardization in the field of information
exchange for demand response and in connecting demand side equipment and/or systems
into the Smart Grid.” Also, “PC 118 will develop a harmonized and consistent suite of
standards for the users.” PC 118 will work with existing IEC, ISO standards and examine
existing national standards in order to identify the collection of standards that together meet
the needs of the Customer Smart Grid interface.
The PC 118 SBP specifically states, “Smart Grid user interface related standards prepared by
other technical committees of the IEC (including IEC/ISO JTC1) shall be used where
applicable. PC 118 shall apply analytical approach and Use Cases developed by IEC TC 8 for
Smart Grid requirements. PC 118 shall use IEC CIM and IEC 61850, and will develop new
information models in view of demand side needs and characteristics. PC 118 shall consider
IEC TC 57, TC 13, TC 59, TC 69, TC 72, TC 100, IEC/ISO JTC1 SC 25, TC 56, TC 65, etc.,
related architectures and standards. PC 118 should also consider Smart Grid user interface
related standards prepared by other organizations such as ISO and ITU.”
0.4 Report overview
Clause 2 introduces the customer (the Smart Grid user) interface—an interface between
separate and historically independent domains. Subclause 2.3 presents a high-level
conceptual model for demand response interactions from loosely coupled market interactions
down to direct load control interactions. Subclause 2.4 organizes the functional requirements
that have been discussed in PC 118. The remainder of Clause 2 examines the SGUI
architecture, actors, and quality requirements.
Clause 3 begins with an overview of PC 118 member country perspectives on SGUI and an
overview of contributed use cases (details in Annex C). Subclause 3.4 presents an analysis of
use cases organized according to the functional requirements in 2.4. Subclause 3.5 looks at
the relationship of SGUI to advanced metering infrastructure (AMI) and electric vehicles.
Clause 4 examines existing standards relevant to the use case classes to identify standards
that meet the needs of the SGUI, or alternatively to identify gaps in IEC standards. This in
turn informs Clause 5 recommendations for IEC SGUI standards development work.
0.5 Key recommendations and findings
PC 118 has identified some gaps in international standards for each of the use case classes
presented in 4.4. Several existing national standards are recommended for advancement in
IEC. Discussion of recommendations can be found in 4.5 and Clause 5.

_____________
Numbers in square brackets refer to the Bibliography.
The COSEM data model is also used by other Technical Committees responsible for non-electricity metering.

– 12 – IEC TR 62939-1:2014 © IEC 2014
SMART GRID USER INTERFACE –
Part 1: Interface overview and country perspectives

1 Scope
This part of IEC 62939, which is a technical report, presents an international consensus
perspective on the vision for a Smart Grid user interface (SGUI) including: SGUI requirements
distilled from use cases for communications across the customer interface (the SGUI); an
analysis of exis
...