SIST EN IEC 61968-5:2020

Application integration at electric utilities - System interfaces for distribution management – Part 5: Distributed energy optimization

The scope of this part of IEC 61968 is the description of a set of functions that are needed for
enterprise integration of DERMS functions. These exchanges are most likely between a DERMS
and a DMS. However, since this is an enterprise integration standard which may leverage
IEC 61968-100:2013 for application integration (using web services or JMS) or other looselycoupled
implementations, there are no technical limitations for systems with which a DERMS
might exchange information. Also, it should be noted that a DERMS might communicate with
individual DER using a variety of standards and protocols such as IEC 61850, IEEE 2030.5,
Distribution Network Protocol (DNP), Sunspec Modbus, or perhaps Open Field Message Bus
(OpenFMB). One role of the DERMS is to manage this disparity and complexity of
communications on the behalf of the system operator. However, the communication to individual
DER is out of scope of this standard. Readers are invited to look to those standards to
understand communication to individual DERs' smart inverter.
The scope will be limited to the following use case categories:
• DER group creation – a mechanism to manage DER in aggregate
• DER group maintenance – a mechanism to add, remove, or modify the members and/or
aggregated capabilities of a given group of DER
• DER group deletion – removing an entire group
• DER group status monitoring – a mechanism for quantifying or ascertaining the current
capabilities and/or status of a group of DER
• DER group forecast – a mechanism for predicting the capabilities and/or status of a group
of DER for a given time period in the future
• DER group dispatch – a mechanism for requesting that specified capabilities of a group of
DER be dispatched to the grid
• DER group voltage ramp rate control – a mechanism for requesting that a DER group
following a ramp rate curve
• DER group connect/disconnect – a mechanism to request that DER either isolate
themselves, or reconnect to the grid as needed

Integration von Anwendungen in Anlagen der Elektrizitätsversorgung – Systemschnittstellen für Netzführung – Teil 5: Optimierung dezentraler Energie

Intégration d'applications pour les services électriques - Interfaces système pour la gestion de distribution - Partie 5: Optimisation de l'énergie distribuée

IEC 61968-5:2020 est la description d'un ensemble de fonctions indispensables à l'intégration par les entreprises des fonctions DERMS. Ces échanges sont les plus susceptibles d'avoir lieu entre un DERMS et un DMS. Toutefois, étant donné qu'une norme d'intégration par les entreprises peut s'appuyer sur l'IEC 61968 100:2013 pour l'intégration d'applications (par le biais de services web ou de la technologie JMS) ou d'autres implémentations faiblement couplées, les systèmes avec lesquels un DERMS peut échanger des informations ne font l'objet d'aucune limite technique. De même, il convient de noter qu'un DERMS peut communiquer avec une DER individuelle en utilisant une variété de normes et de protocoles comme l'IEC 61850, l'IEEE 2030.5, le protocole DNP (Distribution Network Protocol – Protocole de réseau de distribution), Sunspec Modbus, voire Open Field Message Bus (OpenFMB). Un rôle du DERMS consiste à gérer cette disparité et cette complexité des communications au nom de l'opérateur système. Toutefois, la communication avec la DER individuelle est hors du domaine d'application de la présente norme. Il convient que le lecteur consulte ces normes pour comprendre la communication avec l'onduleur intelligent d'une DER individuelle.
Le domaine d'application est limité aux catégories de cas d'utilisation suivantes:
• création de groupe de DER – mécanisme de gestion de DER en agrégat;
• maintenance de groupe de DER – mécanisme d'ajout, de retrait ou de modification des membres et/ou capacités agrégées d'un groupe de DER donné;
• suppression de groupe de DER – suppression d'un groupe entier;
• surveillance du statut d'un groupe de DER – mécanisme de quantification ou de vérification des capacités réelles et/ou du statut d'un groupe de DER;
• prévision de groupe de DER – mécanisme de prévision des capacités et/ou du statut d'un groupe de DER pour une période donnée ultérieure;
• répartition de groupe de DER – mécanisme de demande de répartition des capacités spécifiées d'un groupe de DER sur le réseau;
• contrôle du taux de rampe de tension du groupe de DER – mécanisme permettant de demander qu'un groupe de DER respecte la courbe de taux de rampe;
• branchement/débranchement du groupe de DER – mécanisme permettant de demander que les DER s'isolent elles-mêmes ou se reconnectent au réseau, en fonction des besoins.

Združevanje aplikacij pri oskrbi z električno enegijo - Sistemski vmesniki za upravljanje distribucije - 5. del: Optimizacija porazdeljenih energijskhi virov

General Information

• Status: Published
• Publication Date: 12-Oct-2020
• ICS: 29.240.30 - Control equipment for electric power systems
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: PSE - Power systems management
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 07-Oct-2020
• Due Date: 12-Dec-2020
• Completion Date: 13-Oct-2020
• Ref Project: EN IEC 61968-5:2020 - Application integration at electric utilities - System interfaces for distribution management - Part 5: Distributed energy optimization

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 61968-5:2020
01-november-2020
Združevanje aplikacij pri oskrbi z električno enegijo - Sistemski vmesniki za
upravljanje distribucije - 5. del: Optimizacija porazdeljenih energijskhi virov
Application integration at electric utilities - System interfaces for distribution management
– Part 5: Distributed energy optimization
Intégration d'applications pour les services électriques - Interfaces système pour la
gestion de distribution - Partie 5: Optimisation de l'énergie distribuée
Ta slovenski standard je istoveten z: EN IEC 61968-5:2020
ICS:
29.240.30 Krmilna oprema za Control equipment for electric
elektroenergetske sisteme power systems
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
SIST EN IEC 61968-5:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 61968-5:2020

---------------------- Page: 2 ----------------------
SIST EN IEC 61968-5:2020


EUROPEAN STANDARD EN IEC 61968-5

NORME EUROPÉENNE

EUROPÄISCHE NORM
September 2020
ICS 33.200

English Version
Application integration at electric utilities - System interfaces for
distribution management - Part 5: Distributed energy
optimization
(IEC 61968-5:2020)
Intégration d'applications pour les services électriques - Integration von Anwendungen in Anlagen der
Interfaces système pour la gestion de distribution - Partie 5: Elektrizitätsversorgung - Systemschnittstellen für
Optimisation de l'énergie distribuée Netzführung - Teil 5: Optimierung dezentraler Energie
(IEC 61968-5:2020) (IEC 61968-5:2020)
This European Standard was approved by CENELEC on 2020-09-22. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 61968-5:2020 E

---------------------- Page: 3 ----------------------
SIST EN IEC 61968-5:2020
EN IEC 61968-5:2020 (E)
European foreword
The text of document 57/2223/FDIS, future edition 1 of IEC 61968-5, prepared by IEC/TC 57 “Power
systems management and associated information exchange” was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN IEC 61968-5:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-06-22
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-09-22
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 61968-5:2020 was approved by CENELEC as a European
Standard without any modification.

2

---------------------- Page: 4 ----------------------
SIST EN IEC 61968-5:2020
EN IEC 61968-5:2020 (E)
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
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.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-300 - International Electrotechnical Vocabulary - - -
Electrical and electronic measurements
and measuring instruments - Part 311:
General terms relating to measurements -
Part 312: General terms relating to
electrical measurements - Part 313: Types
of electrical measuring instruments - Part
314: Specific terms according to the type of
instrument
IEC/TS 61968-2 - Application integration at electric utilities - - -
System interfaces for distribution
management - Part 2: Glossary
IEC 61968-9 2013 Application integration at electric utilities - EN 61968-9 2014
System interfaces for distribution
management - Part 9: Interfaces for meter
reading and control
IEC 61968-11 - Application integration at electric utilities - EN 61968-11 -
System interfaces for distribution
management - Part 11: Common
information model (CIM) extensions for
distribution
IEC 61968-100 2013 Application integration at electric utilities - EN 61968-100 2013
System interfaces for distribution
management - Part 100: Implementation
profiles
IEC 62055-31 - Electricity metering - Payment systems - EN 62055-31 -
Part 31: Particular requirements - Static
payment meters for active energy (classes
1 and 2)
IEC/TR 62051 - Electricity metering - Glossary of terms - -
IEC/TR 62357-1 2016 Power systems management and - -
associated information exchange - Part 1:
Reference architecture
3

---------------------- Page: 5 ----------------------
SIST EN IEC 61968-5:2020
EN IEC 61968-5:2020 (E)
IEEE 1547 2018 IEEE Standard for Interconnection and - -
Interoperability of Distributed Energy
Resources with Associated Electric Power
Systems Interfaces


4

---------------------- Page: 6 ----------------------
SIST EN IEC 61968-5:2020




IEC 61968-5

®


Edition 1.0 2020-08




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE
colour

inside










Application integration at electric utilities – System interfaces for distribution

management –

Part 5: Distributed energy optimization



Intégration d'applications pour les services électriques – Interfaces système

pour la gestion de distribution –


Partie 5: Optimisation de l'énergie distribuée













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 33.200 ISBN 978-2-8322-8705-7




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

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

---------------------- Page: 7 ----------------------
SIST EN IEC 61968-5:2020
– 2 – IEC 61968-5:2020 © IEC 2020
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 9
2 Normative references . 10
3 Terms, definitions and abbreviated terms . 11
3.1 Terms and definitions . 11
3.2 Abbreviated terms . 11
4 Conventions . 12
4.1 UML diagrams. 12
4.2 Units of measure in DER enterprise integration profiles . 12
5 DER enterprise integration use cases . 12
5.1 General . 12
5.2 DER Group creation . 15
5.2.1 General . 15
5.2.2 Grouping requirements . 15
5.2.3 Challenges posed by dynamic distribution system configurations . 15
5.2.4 Challenges posed by enterprise information models . 17
5.2.5 Using arbitrarily-defined groups for DER aggregation . 19
5.3 Maintenance of DERGroups . 21
5.3.1 General . 21
5.3.2 DER Group maintenance example . 22
5.4 DER Group queries . 24
5.5 DER Group status monitoring . 25
5.6 DER Group forecast . 27
5.7 DER Group dispatch . 30
5.8 DER Group Connect/Disconnect . 32
5.9 DER group capability discovery. 32
5.10 DER group voltage regulation function . 33
Annex A (normative) Data requirements for DERMS profiles . 34
A.1 General . 34
A.2 DERGroups profile (constrained version) . 34
A.3 DERGroups profile (unconstrained version) . 35
A.4 DERGroupDispatches profile (constrained version) . 35
A.5 DERGroupDispatches profile (unconstrained version) . 36
A.6 DERGroupForecasts (constrained) . 36
A.7 DERGroupForecasts (unconstrained) . 37
A.8 DERGroupStatuses profile . 37
A.9 EndDeviceControls . 37
A.10 DERGroupQueries . 37
A.11 DERGroupStatusQueries . 38
A.12 DERGroupForecastqueries . 38
Annex B (normative) Super classes . 39
B.1 General . 39
B.2 CurveStyle class . 39
B.3 DERCurveData class . 39
B.4 DERFunction class . 39

---------------------- Page: 8 ----------------------
SIST EN IEC 61968-5:2020
IEC 61968-5:2020 © IEC 2020 – 3 –
B.5 DERMonitorableParameter class. 40
B.6 DERNamePlate class . 40
B.7 DispatchSchedule class . 42
B.8 EndDevice class . 42
B.9 EndDeviceGroup class . 43
B.10 EndDeviceGroup (constrained) for dispatches and forecasts . 43
B.11 EndDeviceGroup (unconstrained) for dispatches and forecasts . 43
B.12 Names . 44
B.13 NameType . 44
B.14 NameTypeAuthority . 44
B.15 Status class . 44
B.16 Version class . 45
Annex C (normative) Enumerated classes . 46
C.1 General . 46
C.2 abnormalOperatingPerformanceCategory enumeration class . 46
C.3 DERParameterKind enumeration class . 46
C.4 DERUnitSymbol . 47
C.5 FlowDirectionKind enumeration class . 48
C.6 normalOperatingPerformanceCategory enumeration class . 48
C.7 TimeIntervalKind enumeration class . 48
C.8 UnitMultiplier enumeration class . 49

Figure 1 – Architectural options for DERMS deployments . 13
Figure 2 – Reference architecture, IEC TR 62357‑1:2016 . 14
Figure 3 – Example of simple radial feeder . 16
Figure 4 – Example of feeder with alternate substation . 16
Figure 5 – Example of an interconnected distribution network . 17
Figure 6 – Common Information Model illustration . 18
Figure 7 – Request/Reply message exchange pattern for the creation of a DERGroup . 19
Figure 8 – Notification message exchange pattern for the creation of a DERGroup . 20
Figure 9 – Message exchange patterns to support adding or modifying DERGroup
membership or capabilities, or deleting a group member . 21
Figure 10 – Message exchange pattern reflecting deleting an entire DER group
(delete) . 22
Figure 11 – Message exchange pattern to support querying a DER group . 25
Figure 12 – Message exchange pattern for DER Group status monitoring (PULL) . 26
Figure 13 – Message exchange pattern for DER Group status monitoring (PUSH) . 26
Figure 14 – Example of points to represent battery storage group forecast . 27
Figure 15 – Battery DER Group availability example . 28
Figure 16 – Message exchange pattern for DER Group forecasting (PULL). 29
Figure 17 – Message exchange pattern for DER Group forecasting (PUSH) . 30
Figure 18 – Example Message exchange pattern for DER Group dispatch . 31

Table 1 – IEC 61968-5 Profiles . 9
Table 2 – IEC 61968-9 Profiles . 10
Table 3 – Document overview for IEC 61968-5 . 10

---------------------- Page: 9 ----------------------
SIST EN IEC 61968-5:2020
– 4 – IEC 61968-5:2020 © IEC 2020
Table 4 – DER Grouping functional requirements . 15
Table 5 – Example DER Group A membership before update. 22
Table 6 – Example DER Group A after adding a fourth member . 23
Table 7 – Example DER Group A membership after delete . 24
Table A.1 – IdentifiedObject . 34
Table A.2 – DERGroups profile . 35
Table A.3 – DERGroups (Unconstrained) Profile . 35
Table A.4 – DERGroupDispatches (Unconstrained) Profile . 36
Table A.5 – DERGroupDispatches (unconstrained) profile . 36
Table A.6 – DERGroupForecast (constrained) profile . 36
Table A.7 – DERGroupForecast (unconstrained) profile . 37
Table A.8 – DERGroupStatuses profile . 37
Table A.9 – DERGroupQueries . 38
Table A.10 – DERGroupStatusQueries . 38
Table A.11 – DERGroupForecastQueries . 38
Table B.1 – CurveStyle class . 39
Table B.2 – DERCurveData class . 39
Table B.3 – DERFunction class . 40
Table B.4 – DERMonitorableParameter class . 40
Table B.5 – DERNamePlate . 41
Table B.6 – DispatchSchedule . 42
Table B.7 – EndDevice . 43
Table B.8 – EndDeviceGroup class . 43
Table B.9 – EndDeviceGroup (constrained) dispatches class . 43
Table B.10 – EndDeviceGroup (unconstrained) for dispatches and forecasts . 43
Table B.11 – Names . 44
Table B.12 – NameType . 44
Table B.13 – NameTypeAuthority . 44
Table B.14 – Status class . 44
Table B.15 – Version class . 45
Table C.1 – abnormalOperatingPerformanceCategory . 46
Table C.2 – DERParameterKind . 46
Table C.3 – DERUnitSymbol . 47
Table C.4 – FlowDirectionKind . 48
Table C.5 – normalOperatingPerformanceCategory . 48
Table C.6 – TimeIntervalKind . 49
Table C.7 – UnitMultiplier. 49

---------------------- Page: 10 ----------------------
SIST EN IEC 61968-5:2020
IEC 61968-5:2020 © IEC 2020 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

APPLICATION INTEGRATION AT ELECTRIC UTILITIES –
SYSTEM INTERFACES FOR DISTRIBUTION MANAGEMENT –

Part 5: Distributed energy optimization

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.
International Standard IEC 61968-5 has been prepared by IEC technical committee 57: Power
systems management and associated information exchange.
The text of this International Standard is based on the following documents:
FDIS Report on voting
57/2223/FDIS 57/2252/RVD

Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 61968 series, published under the general title Application
integration at electric utilities – System interfaces for distribution management, can be found
on the IEC website.

---------------------- Page: 11 ----------------------
SIST EN IEC 61968-5:2020
– 6 – IEC 61968-5:2020 © IEC 2020
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://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: 12 ----------------------
SIST EN IEC 61968-5:2020
IEC 61968-5:2020 © IEC 2020 – 7 –
INTRODUCTION
Technology advancements in various types of distributed energy resources (DER), have driven
increases in their evaluation and employment by utilities, consumers, and third parties. These
DER are often connected to the grid at the distribution level where their presence in large scale
or volume could be disruptive if not designed, integrated, and managed properly.
Inverters, the power converter circuits that integrate DER to the grid, are highly-capable devices
with fast power controls and no inherent inertia such that they can respond quickly to commands
and local conditions. Even small-scale inverters tend to have processing and memory resources
and can support a variety of communication protocols and advanced functions. Over the last
few years, industry efforts have defined a wide range of standard grid-supportive functions that
inverters may provide and standard communication protocols that allow these functions to be
remotely monitored and managed.
If these inverter capabilities can be properly exposed and integrated into traditional utility
system operations, high penetration DER can be transformed from problematic uncertainties to
beneficial tools for distribution management. To achieve these potential benefits, it needs to be
possible not just to communicate to individual DER devices using standard protocols, but also
for the systems that manage DER, referred to herein as DER Management System or "DERMS",
to effectively inform other software applications regarding the resources available and to
exchange information that allows the DER to be managed effectively. Additionally, due to scale
of some devices, to optimize the management of DER t
...