IEC SRD 62913-1:2022
(Main)Generic smart grid requirements - Part 1: Specific application of the use case methodology for defining generic smart grid requirements according to the IEC systems approach
Generic smart grid requirements - Part 1: Specific application of the use case methodology for defining generic smart grid requirements according to the IEC systems approach
IEC SRD 62913-1:2022 (E) describes a common approach for IEC technical committees to define generic smart grid requirements for further standardization work. It uses as input the use case methodology defined as part of the IEC 62559 series, and provides a more detailed methodology for describing use cases and extracting requirements from these use cases. This will achieve a consistent and homogeneous description of generic requirements for the different areas which make up the smart grid environment
This second edition cancels and replaces the first edition published in 2019. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
• it consolidates requirements identification and management and their associated naming rules;
• it leverages IEC SRD 63200:2021, Definition of extended SGAM Smart Energy Grid Reference Architecture Model;
• it highlights links between use case methodology and other tools and methodologies (i.e. TOGAF/ArchiMate as used in IEC 61968-1:2020).
General Information
Relations
Standards Content (Sample)
IEC SRD 62913-1 ®
Edition 2.0 2022-08
SYSTEMS
REFERENCE DELIVERABLE
colour
inside
Generic smart grid requirements –
Part 1: Specific application of the use case methodology for defining generic
smart grid requirements according to the IEC systems approach
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 Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
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 corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always
committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 19 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
IEC SRD 62913-1 ®
Edition 2.0 2022-08
SYSTEMS
REFERENCE DELIVERABLE
colour
inside
Generic smart grid requirements –
Part 1: Specific application of the use case methodology for defining generic
smart grid requirements according to the IEC systems approach
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.020; 29.240 ISBN 978-2-8322-4434-0
– 2 – IEC SRD 62913-1:2022 © IEC 2022
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 12
4 Systems approach . 13
4.1 A systems perspective . 13
4.2 Applying the IEC systems approach to smart energy . 13
4.3 Main areas of work. 15
4.4 Breaking down the scope . 16
4.5 Link with some existing conceptual models . 16
5 Specific application of use case methodology for defining generic smart grid
requirements . 17
5.1 General . 17
5.2 Why the use case methodology is particularly adapted to smart grid . 17
5.2.1 General . 17
5.2.2 Linking the use case methodology with existing frameworks . 18
5.2.3 Notion of role . 21
5.3 Applying the use case methodology to define generic smart grid
requirements . 22
5.3.1 A customer-centric and business-processes-driven approach . 22
5.3.2 Generic smart grid requirements . 26
5.4 Approach used to elaborate a consolidated smart grid role model . 30
6 UML profile for modelling smart grid use cases . 31
6.1 A formal approach of use cases modelling . 31
6.1.1 General . 31
6.1.2 Key principles . 31
6.2 UML-driven top-down approach methodology . 32
6.2.1 Formalism and objectives . 32
6.2.2 Modelling language. 32
6.2.3 Scope and information type classification: diagrams and main elements . 33
6.2.4 Key benefits . 34
6.2.5 Types of diagrams and views . 36
6.3 IEC use cases UML profile concepts . 38
7 UML modelling diagrams . 40
Annex A (informative) Existing Actors Lists . 44
Annex B (informative) Content of the use case mapped on IEC 62559-2 template . 45
B.1 Description of the use case . 45
B.1.1 Name of use case . 45
B.1.2 Version management . 45
B.1.3 Scope and objectives of use case . 45
B.1.4 Narrative of use case . 45
B.1.5 Key performance indicators (KPI) . 46
B.1.6 Use case conditions. 46
B.1.7 Further information to the use case for classification / mapping . 46
B.1.8 General remarks . 46
B.2 Diagrams of use case . 46
B.3 Technical details . 47
B.3.1 Actors . 47
B.3.2 References . 47
B.4 Step by step analysis of use case . 47
B.4.1 Overview of scenarios . 47
B.4.2 Steps of scenarios . 48
B.5 Information exchanged . 48
B.6 Requirements (optional) . 48
B.7 Common terms and definitions . 48
B.8 Custom information (optional) . 49
B.9 IEC 62559-2 UML Modelling . 49
Annex C (informative) Example of telecommunications related non-functional
requirements . 51
Annex D (informative) Existing Smart Grid Conceptual Models . 52
Bibliography . 54
Figure 1 – The GridWise Architecture Council's model (NIST, 2012) . 18
Figure 2 – Simplification of the GWAC model (CEN-CENELEC-ETSI, 2014) . 19
Figure 3 – Smart grid plane domains and hierarchical zones . 19
Figure 4 – The Smart Grid Architecture Model (CEN-CENELEC-ETSI, 2014) . 20
Figure 5 – Interactions between the use case methodology and the Smart Grid
Architecture Model (based on CEN-CENELEC-ETSI, 2014) . 21
Figure 6 – Defining smart grid requirements methodology . 23
Figure 7 – Point of view of a domain role . 24
Figure 8 – The first two levels of detail used to capture generic smart grid
requirements . 25
Figure 9 – The three levels of detail used to capture generic smart grid requirements . 26
Figure 10 – Generic smart grid functional requirements and non-functional
requirements captured in use cases . 28
Figure 11 – Example of representation of a domain's role model . 30
Figure 12 – Example of representation of relations between roles . 31
Figure 13 – Four-layer model architecture . 33
Figure 14 – UML use case profile for the IEC SRD 62913 series aligned with the
IEC 62559 series . 36
Figure 15 – Use case overview diagram . 37
Figure 16 – Domain overview diagram . 37
Figure 17 – BUC-SUC relations diagram . 38
Figure 18 – Mapping between use case concepts and architecture concepts . 40
Figure 19 – Domain overview concepts UML model . 41
Figure 20 – Use case overview concepts UML model . 41
Figure 21 – Scenario overview concepts UML model . 42
Figure 22 – Activity overview concepts UML model . 43
Figure 23 – Requirement overview concepts UML model . 43
– 4 – IEC SRD 62913-1:2022 © IEC 2022
Figure C.1 – Use case mapping to IEC 62559-2 . 49
Figure C.2 – Use case mapping to IEC 62559-2 – Scenario and activities . 50
Figure D.1 – NIST/SGIP Smart Grid Conceptual Model . 52
Figure D.2 – M490 domains . 53
Table 1 – Differences between business use cases and system use cases . 12
Table 2 – Links between SGAM and IEC SRD 62913 series domains. 17
Table 3 – Use cases concepts . 39
Table C.1 – Example of telecommunications related non-functional requirements . 51
Table D.1 – NIST/SGIP domains . 52
Table D.2 – SGAM domains . 53
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GENERIC SMART GRID REQUIREMENTS –
Part 1: Specific application of the use case methodology for defining
generic smart grid requirements according to the IEC systems approach
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.
IEC SRD 62913-1, which is a Systems Reference Deliverable, has been prepared by
IEC systems committee Smart Energy.
This second edition cancels and replaces the first edition published in 2019. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
• it consolidates requirements identification and management and their associated naming
rules;
• it leverages IEC SRD 63200:2021, Definition of extended SGAM Smart Energy Grid
Reference Architecture Model;
• it highlights links between use case methodology and other tools and methodologies (i.e.
TOGAF/ArchiMate as used in IEC 61968-1:2020).
– 6 – IEC SRD 62913-1:2022 © IEC 2022
The text of this Systems Reference Deliverable is based on the following documents:
Draft Report on voting
SyCSmartEnergy /169/DTS SyCSmartEnergy /204/RVDTS
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 Systems Reference Deliverable is English.
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.
A list of all parts in the IEC SRD 62913 series, published under the general title Generic smart
grid requirements, can be found on the IEC website.
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.
INTRODUCTION
IEC SRD 62913 generic smart grid requirements are needed to fulfil the SG3 decision 2 made
by the SMB at its February 2010 meeting (SMB/4204/DL, Decision 137/10) requesting the need
to describe all the functional and system requirements for all smart grid applications.
The IEC Smart Grid Standardization Roadmap states that "the standardization process should
offer a formal path between the application as 'requested' by smart grid (stakeholders) and the
standards themselves, i.e. a 'top-down' process", whilst at the same time recognizing that for
various reasons in many cases this path has not been the one implemented. This has in turn
led to inconsistencies in standards.
The purpose of the IEC systems approach is to ensure and improve the interoperability between
smart energy systems and components. This approach is based on the business needs
expressed by the market. The main purpose of capturing and sharing generic smart grid
requirements is the constitution of a basis for coming standardization work, with standards
ensuring and facilitating the deployment of smart grid applications.
A working group has been set up within IEC SyC Smart Energy in order to capture the smart
grid requirements derived from the market needs, using a standardized approach based on use
cases as described in the IEC 62559 series. This work is building on existing use cases, namely
within the IEC when they exist, and is carried out collaboratively with the experts of the relevant
technical committees.
The IEC SRD 62913 series will deliver an applicable methodology to draft use cases
(IEC SRD 62913-1), clarifying 'who does what' with regards to smart energy use cases, and it
will also initiate the process of listing, organizing and making available the use cases which
carry the smart energy requirements which should be addressed by the IEC core technical
standards (IEC SRD 62913-2 series). The IEC systems approach will require adapted tools and
processes to facilitate its implementation, and until they are available to the IEC National
Committees and experts, the IEC SRD 62913-2 series should be understood as the first
stepping stone towards this systems approach implementation. IEC SRD 62913-3 will be a roles
database, based on a harmonized naming methodology, to ensure consistency when drafting
smart energy use cases. This will provide a consistent and ready-to-use framework for all
standardization stakeholders.
Use cases in the top-down approach of IEC SyC Smart Energy (C/1845/RV) are tools to identify
smart grid requirements used to assess situations in standards (gaps or overlaps) and in that
way contribute to interoperability. These requirements can also be used further as input for
interoperability profiles for the testing phase.
These requirements should then feed into the work carried out by IEC SyC Smart Energy with
other technical committees in order to ensure the technical standards are developed taking into
account the needs and priorities of the smart grid market.
This document corresponds to the specific application of the use case methodology for defining
generic smart grid requirements according to the IEC systems approach.
– 8 – IEC SRD 62913-1:2022 © IEC 2022
GENERIC SMART GRID REQUIREMENTS –
Part 1: Specific application of the use case methodology for defining
generic smart grid requirements according to the IEC systems approach
1 Scope
This part of IEC SRD 62913 describes a common approach for IEC technical committees to
define generic smart grid requirements for further standardization work. It uses as input the use
case methodology defined as part of the IEC 62559 series, and provides a more detailed
methodology for describing use cases and extracting requirements from these use cases. This
will achieve a consistent and homogeneous description of generic requirements for the different
areas which make up the smart grid environment.
2 Normative references
There are no normative references in this document.
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
activity
part of a scenario that can be executed by one or more roles
Note 1 to entry: The details of an activity are described through actions. However, if it is necessary, intermediate
levels can be created where activities describe an activity.
3.1.2
actor
entity that communicates and interacts
Note 1 to entry: These actors can include people, software applications, systems, databases, and even the power
system itself.
Note 2 to entry: In IEC SRD 62913 this term includes the concepts of business role and system role involved in use
cases.
[SOURCE: IEC 62559-2:2015, 3.2]
3.1.3
business case
explanation or set of reasons describing how a business decision will improve a business,
product, etc. and how it will affect costs and profits and attract investments
Note 1 to entry: Equivalent to strategic goals and principles which drive business processes.
3.1.4
business process
chain of logical connected, repetitive activities that utilizes the enterprise's resources to refine
an object (physical or mental) for the purpose of achieving specified and measurable
results/products for internal or external customers
Note 1 to entry: In the context of IEC SRD 62913, the business processes describe the sequenced interactions
between several roles of a system.
Note 2 to entry: Business processes can be described or modelled as business use cases.
[SOURCE: Ericsson Quality Institute (1993): Business Process Management, Gothenburg,
Sweden]
3.1.5
business role
role describing a finite set of responsibilities that is assumed by a party
Note 1 to entry: Organizations, organizational entities and physical persons are examples of business roles.
3.1.6
cluster
group of items organized by criteria
3.1.7
consumer
end user of electricity
Note 1 to entry: Consumers never generate or store the use of electricity.
3.1.8
demand response
DR
action resulting from management of the electricity demand in response to supply conditions
[SOURCE: IEC 60050-617:2018, 617-04-16]
3.1.9
domain
group of related subjects of standardization
[SOURCE: IEC 60050-901:2013, 901-01-03, modified – The term "field of standardization" has
been replaced by "domain".]
3.1.10
functional requirement
requirement that describes what the system must do
Note 1 to entry: They are actions in response to events, or actions performed autonomously. They represent
operations and features provided.
[SOURCE: IEC 62559-2:2015, 7.2.6.2]
3.1.11
level of maturity
one of a set of structured levels that describe how well a process, or use case, is implemented
through an organization and relates to its degree of formality, optimization and reliability
Note 1 to entry: Proposed levels of maturity:
– 10 – IEC SRD 62913-1:2022 © IEC 2022
– Level "Already implemented": the process is implemented in and between several organizations, it is well defined,
reliable, sustainable and few uncertainties remain in its framework (regulatory, business or technological).
– Level "Adjustments in progress": the process is implemented in a few organizations, it is well defined but subject
to remaining major uncertainties in its framework (regulatory, business or technological).
– Level "Explorative": the process is tested in very few organizations, it is not completely defined and subject to
numerous major uncertainties in its framework (regulatory, business or technological).
3.1.12
non-functional requirement
NFR
requirement that describes what qualities the system must contain from an execution and
performance perspective
Note 1 to entry: These are also known as "constraints", "behaviour", "criteria", "performance targets", etc. They set
limits or controls on how well the system performs the functional requirements.
Note 2 to entry: Non-functional requirements include: reliability, security, usability, upgradeability, expandability,
scalability, compatibility, safety, performance, and conformance.
[SOURCE: IEC 62559-2:2015, 7.2.6.2]
3.1.13
prosumer
end user of electricity who may also generate, store and manage the use of electricity
Note 1 to entry: Traditionally, three prosumer types are discussed: residential, industrial and commercial.
3.1.14
requirement
provision that conveys criteria to be fulfilled
[SOURCE: IEC 60050-901:2013, 901-05-05]
3.1.15
role
type of actor which has responsibilities and represents the external intended behaviour of a
party
EXAMPLE A legally defined market participant (e.g. grid operator, customer), a generic role which represents a
bundle of possible roles (e.g. flexibility operator) or an artificially defined body needed for generic process and use
case descriptions.
Note 1 to entry: The IEC SRD 62913 series uses two kinds of role: business roles and system roles.
Note 2 to entry: Legally or generically defined external actors can be named and identified by their roles.
[SOURCE: SG-CG/M490/C:2012-12]
3.1.16
scenario
possible sequence of interactions
[SOURCE: SG-CG/M490/E:2012-12; definition 3.10]
3.1.17
service
specific transaction satisfied by a business process involving two or more roles
3.1.18
smart grid
electric power system that utilizes information exchange and control technologies, distributed
computing and associated sensors and actuators
Note 1 to entry: Purposes of smart grids are, for example,
– to integrate the behaviour and actions of the network users and other stakeholders,
– to efficiently deliver sustainable, economic and secure electricity supplies.
[SOURCE: IEC 60050-617:2018, 617-04-13, modified – The second part of the definition has
been moved to a Note to entry.]
3.1.19
smart grid function
transformation of a number of input data, collected with the use of information and
communication technologies, into a number of technical results to enable one or several
business processes of the electric power system
Note 1 to entry: The implementation of smart grid functions requires the coordinated use of a series of equipment
and software (generally called smart grid systems, such as AMI or DER Management system).
Note 2 to entry: Smart grid functions and the associated interactions between systems, devices and operators can
be described or modelled as system use cases.
3.1.20
system
set of interrelated elements considered in a defined context as a whole and separated from
their environment
Note 1 to entry: System is defined in the systems activities Administrative Circular AC/33/2013 as: "a group of
interacting, interrelated, or independent elements forming a purposeful whole of a complexity that requires specific
structures and work methods in order to support applications and services relevant to IEC stakeholders. "
[SOURCE: IEC 62559-2:2015, 3.7]
3.1.21
system role
role describing a finite set of functionalities that is assumed by an entity
Note 1 to entry: device, information system and equipment are examples of system roles.
3.1.22
transmission of electricity
transfer in bulk of electricity, from generating stations to areas of consumption
[SOURCE: IEC 60050-601:1985, 601-01-09]
3.1.23
use case
specification of a set of actions performed by a system, which yields an observable result that
is, typically, of value for one or more actors or other stakeholders of the system
Note 1 to entry: There are two types of use case:
– Business use cases describe how business roles interact to execute a business process. These processes are
derived from services, i.e. business transactions, which have previously been identified.
– System use cases describe how system and/or business roles of a given system interact to perform a smart grid
function required to enable or facilitate the business processes described in business use cases. Their purpose
is to detail the execution of those processes from an information system perspective.
– 12 – IEC SRD 62913-1:2022 © IEC 2022
Note 2 to entry: Since a smart grid function can be used to enable or facilitate more than one business process, a
system use case can be linked to more than one business use case.
Table 1 highlights the differences between these two types of use case.
[SOURCE: SG-CG/M490/E:2012-12]
Table 1 – Differences between business use cases and system use cases
Type of use case Description Roles involved
Business use case (BUC) Depicts a business process – Business roles (organizations,
Expected to be system agnostic organizational entities or physical
persons)
System use case (SUC) Depicts a function or sub-function Business roles and system roles
supporting one or several (devices, Information system)
business processes
3.2 Abbreviated terms
AMI: advanced metering infrastructures
BPMN: business process model and notation
BUC-SUC: business use case-system use case
CEN: European Committee for Standardization
CENELEC: European Committee for Electrotechnical Standardization
CIM: common information model
DER: distributed energy resources
DSO: distribution system operator
ebIX: European forum for energy business information exchange
EFET: European federation of energy traders
ENTSO-E: European network of transmission system operators for electricity
ETSI: European Telecommunications Standards Institute
EURELECTRIC: Union of the Electricity industry
GWAC: GridWise® Architecture Council
MDA: model-driven architecture
NFR: non-functional requirement
NIST: National Institute of Standards and Technology
SDO: standards development organization
SGAM: smart grid architecture model
SMB: IEC Standardization Management Board
TSO: transmission system operator
UML: unified modelling language
XML: extensible markup language
___________
This information is given for the convenience of users of this document and does not constitute an endorsement
by IEC.
4 Systems approach
4.1 A systems perspective
As stated in the Administrative Circular AC/33/2013: As part of the systems approach
implemented by the IEC, systems committees have been defined to work "at the systems
instead of the product level to define reference architectures, use cases and appropriate
standards and guidance on the interfaces, functionality and interaction of a system …".
The multiplicity of technologies and their convergence in many new and emerging markets,
however – particularly those involving large-scale infrastructure – now demand a top-down
approach to standardization, starting at the system or system-architecture rather than at the
product level. System standards are also increasingly required in sectors such as environment,
safety and health.
Although the introduction of such processes in the IEC began some years ago, a major effort is
now required to improve understanding of them and to widen their application. It will be
necessary to take account of the implied need for increased co-operation with many other
standards development organizations, as well as with relevant non-standards bodies in the
international arena. There will also be implications for the IEC's conformity assessment systems
and processes.
Use cases are used to facilitate co-operation at a system level with other standards
development organizations, non-traditional players of electrotechnology, regional organizations
and users of smart energy systems closing the many open loops. Inside IEC they provide a
convergence platform with overall system level value for support and guidance of the technical
committees and other standards development groups, both inside and outside the IEC.
In order to achieve interoperability, use cases are used, in a top-down approach of
IEC SyC Smart Energy, to derive generic smart grid requirements further used to assess
situations in standards (gaps and overlaps) and so contribute to interoperability through better
standardization. Note that use cases also provide a solid platform to define the testing cases
to specify interfaces.
As defined in IEC 60050-617:2011, 617-04-13, a smart grid is an "electric power system that
utilizes information exchange and control technologies, distributed computing and associated
sensors and actuators, for purposes such as:
• to integrate the behaviour and actions of the network users and other stakeholders,
• to efficiently deliver sustainable, economic and secure electricity supplies."
Smart energy in addition to smart grid includes heat and gas in its scope as interactions.
IEC SyC Smart Energy explores needs to optimize the energy use between electricity, heat and
gas and seek value through a larger range of flexibility possibilities (technologies, cost).
The use of the term 'generic' in this document needs to be clarified. IEC standards need to
address the maximum number of requirements needed by its stakeholders, namely those that
bring value to several actors and that are not project specific. Use cases are a tool to capture
requirements, and the importance or the relevance of a requirement is not just determined by
the number of use cases that capture it (although it can be a valid indication). A regulatory
requirement, for example, will be considered a priority in one geography and perhaps not in
another. The fact that there is only one use case that captures that regulatory requirement does
not diminish the importance of the requirement, nor the fact that it needs to be addressed.
4.2 Applying the IEC systems approach to smart energy
"Systems committees (SyC) aim to extend the use of strategic or other horizontal groups to
bridge areas covered by more than one or two TCs or SCs."
– 14 – IEC SRD 62913-1:2022 © IEC 2022
Although definitions like the one above (from the IEC website) help understand the IEC systems
approach, certain clarifications are useful to help understand the scope of the IEC SRD 62913
series.
a) SyC Smart Energy is tasked with consolidating and ensuring the consistency of the generic
smart grid requirements, as well as terminology, for the smart energy domain.
– This work is carried out according to the use case methodology in standardization as
described in the IEC 62559 series, which includes a use case template (IEC 62559-2).
– Use cases are the basis to identify the smart grid standardization requirements as well
as components of the working architectures.
– The specific application of the use case methodology for defining generic smart grid
requirements according to the IEC systems approach is the purpose of this document.
b) SyC Smart Energy will achieve its task by supporting TCs to draft use cases.
– This document provides methodology and drafting guidelines to draft use cases,
differentiating between business use cases and system use cases.
– Use cases are a common language to identify and describes requirements inside a TC
and between TCs.
– TCs continue to provide in-depth technical knowledge of a considered domain.
– SyC Smart Energy needs to ensure that market drivers are captured in the business use
cases ("WHY") and can contribute on drafting system use cases when relevant. This is
important because it is via the aggregation of system use cases and system actors that
a global architecture will emerge, and that is needed to determine whether there are any
gaps in the existing standards (thus completing the IEC's Smart Grid Standards Map).
– The purpose of the IEC SRD 62913-2 series is to initiate the process of listing,
organizing, making available the use cases which carry the smart energy requirements
which will be addressed by the IEC core technical standards. The IEC systems approach
will require adapted tools and processes to facilitate its implementation, and until they
are available to IEC National Committees and experts, the IEC SRD 62913-2 series can
be seen as the first stepping stone towards this systems approach implementation.
– The current content of the IEC SRD 62913-2 series is not exhaustive, but the current
content represents the priorities for the smart energy domain at the time of publication.
It is important that the content in terms of use cases and requirements continues to grow
to encompass the requirements of the broad smart energy stakeholders (both within the
IEC community as well as more generally the other market stakeholders).
– The purpose of the work carried out in SyC Smart Energy is to ensure consistency in the
way requirements are gathered, shared and addressed by the IEC, and to improve the
efficiency of the production of technical standards by reducing the time it takes to identify
gaps or overlaps in the existing technical standards and address these situations. The
fact that SyCs are organized to interact regularly with the market stakeholders (inside
as well as outside the IEC) will ensure that standardization work is aligned on the market
priorities at any given time, and so ultimately help improve the delivery acceptance of
the IEC core standards.
– Note that system use cases can describe different and conflicting approaches to address
the same requirement. However, system use cases can be used to build requirement
repositories, so that these requirements be processed, in order to check inconsistencies
inside one system use case or between two system use cases.
– For the avoidance of doubt, SyC Smart Energy and all its working groups are not and
never had the intention of being a 'control mechanism' on the publications of technical
standards.
c) SyC Smart Energy works on what is needed for "further" standardization work in the smart
energy domain.
– The standardization process taking into account the systems approach focuses on the
priorities today which need further standardization as it will be an impossible task to
include all existing use cases and requirements according to the IEC SRD 62913
methodology.
– The scope covers "what changes or what is new" – although potentially this can cover
more. Ultimately, any use case which brings value to several actors of the electric power
system is of interest to the IEC.
– The basis of work is the on-going standardization work in the TCs and potentially also
new market needs – which determines the priorities for the SyC Smart Energy working
groups.
In addition to a shared and applicable methodology as described in this document, consistency
will be achieved if there is a collaborative work environment between TCs and SyC Smart
Energy.
4.3 Main areas of work
The IEC Smart Grid Standardization Roadmap states:
"Care must be taken to concentrate standardization efforts on providing additional value to the
smart grid implementation. This will be especially true for all interoperability standards, which
will help to re
...








Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...