IEC 61968-5:2020
(Main)Application integration at electric utilities - System interfaces for distribution management - Part 5: Distributed energy optimization
Application integration at electric utilities - System interfaces for distribution management - Part 5: Distributed energy optimization
IEC 61968-5:2020 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 loosely-coupled 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 should look to those standards to understand communication to individual DER’s 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.
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.
General Information
Standards Content (Sample)
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
IEC 61968-5:2020-08(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2020 IEC, Geneva, Switzerland
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.Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
IEC Central Office Tel.: +41 22 919 02 113, 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 Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and
once a month by email. French extracted from the Terms and Definitions clause of
IEC publications issued since 2002. Some entries have beenIEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
If you wish to give us your feedback on this publication or CISPR.need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.
A propos des publications IECLe contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.Recherche de publications IEC - Electropedia - www.electropedia.org
webstore.iec.ch/advsearchform Le premier dictionnaire d'électrotechnologie en ligne au
La recherche avancée permet de trouver des publications IEC monde, avec plus de 22 000 articles terminologiques en
en utilisant différents critères (numéro de référence, texte, anglais et en français, ainsi que les termes équivalents dans
comité d’études,…). Elle donne aussi des informations sur les 16 langues additionnelles. Egalement appelé Vocabulaire
projets et les publications remplacées ou retirées. Electrotechnique International (IEV) en ligne.
IEC Just Published - webstore.iec.ch/justpublished Glossaire IEC - std.iec.ch/glossary
Restez informé sur les nouvelles publications IEC. Just 67 000 entrées terminologiques électrotechniques, en anglais
Published détaille les nouvelles publications parues. et en français, extraites des articles Termes et Définitions des
Disponible en ligne et une fois par mois par email. publications IEC parues depuis 2002. Plus certaines entrées
antérieures extraites des publications des CE 37, 77, 86 etService Clients - webstore.iec.ch/csc CISPR de l'IEC.
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
---------------------- Page: 2 ----------------------
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 CommissionMarque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 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: 4 ----------------------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 DERGroupmembership 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: 5 ----------------------– 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: 6 ----------------------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: 7 ----------------------
– 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: 8 ----------------------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 they are managed in aggregate, referred
hereafter as "DER group management".Traditionally, distribution systems have been operated without extensive controls or centralized
management. More advanced systems may have On-Load Tap Changing transformers (LTCs)
at substations, line regulators, and/or capacitor banks that operate to help optimize distribution
voltage and reactive power flow. In many cases, these devices may be fixed or configured to
operate autonomously. In a growing number of cases, however, a more central Distribution
Management System (DMS) has been used to coordinate their behaviour for a more optimized
overall effect. DMS functionality may reside at the utility operations centre, where single, large-
scale software manages many circuits, or it may reside in a more limited fashion at the
substation or other level, where smaller-scale systems act to manage individual feeders or
circuits.Regardless of the scenario, the present generation of DMS systems is not designed to take
advantage of the capabilities that DER may offer. In most cases, DER support within a DMS is
limited to monitoring the output of "utility scale" DERs (> one megawatt). In addition, existing
industry standards define advanced functions for DER only at the individual device level, and
lack the more aggregated, feeder-level representations that are useful for enterprise integration.
This document develops appropriate enterprise-level functions for the integration of distributed
energy resources. These functions are intended to work in conjunction with the common
functions for smart inverters that have previously been defined.The high-level use cases that are covered include management of DER gro
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.