IEC TS 62933-3-3:2022

Electrical energy storage (EES) systems - Part 3-3: Planning and performance assessment of electrical energy storage systems - Additional requirements for energy intensive and backup power applications

IEC TS 62933-3-3:2022 provides requirements, guidelines and references when EES systems are designed, controlled and operated for energy intensive, islanded grid and backup power supply applications. In energy intensive applications, the EES system provides long charge and discharge phases at variable powers to the supported grid or user equipment. In islanded operation, the EES system provides energy to the islanded grid and coordinates other power generation systems in the islanded grid. In backup power supply and emergency support, the EES system provides energy to the internal grid or a set of emergency loads when the main grid power supply is not available.

General Information

• Status: Published
• Publication Date: 03-Nov-2022
• ICS: 13.020.30 - Environmental impact assessment
• Technical Committee: TC 120 - Electrical Energy Storage (EES) systems
• Drafting Committee: WG 3 - TC 120/WG 3
• Current Stage: PPUB - Publication issued
• Start Date: 06-Dec-2022
• Completion Date: 04-Nov-2022

Standards Content (Sample)

IEC TS 62933-3-3 ®
Edition 1.0 2022-11
TECHNICAL
SPECIFICATION
colour
inside
Electrical energy storage (EES) systems –
Part 3-3: Planning and performance assessment of electrical energy storage
systems – Additional requirements for energy intensive and backup power
applications
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.: [phone]
3, rue de Varembé [e-mail]
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: [e-mail].
IEC TS 62933-3-3 ®
Edition 1.0 2022-11
TECHNICAL
SPECIFICATION
colour
inside
Electrical energy storage (EES) systems –

Part 3-3: Planning and performance assessment of electrical energy storage

systems – Additional requirements for energy intensive and backup power

applications
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.020.30 ISBN 978-2-8322-6007-4

– 2 – IEC TS 62933-3-3:2022  IEC 2022
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions, abbreviated terms and symbols . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms and symbols . 10
3.2.1 Abbreviated terms . 10
3.2.2 Symbols . 11
4 General planning and performance assessment considerations for EES systems . 11
5 Peak shaving and load levelling . 11
5.1 Application of EES system . 11
5.1.1 Functional purpose . 11
5.1.2 Applications related requirements . 11
5.2 Conditions and requirements for connection to the grid . 11
5.3 Design of the EES systems . 12
5.3.1 Structure of the EES systems . 12
5.3.2 Subsystem specification and requirements . 12
5.3.3 Grid integration of the EES systems . 12
5.3.4 Operation and control . 12
5.3.5 Monitoring . 15
5.3.6 Maintenance . 15
5.3.7 Communication interface . 15
5.4 Sizing and resulting parameters of the EES system . 16
5.4.1 Sizing . 16
5.4.2 Characteristics and restrictions of the EES system . 17
5.5 Service life of the EES system . 17
5.5.1 Installation . 17
5.5.2 Performance assessment . 17
5.5.3 Operation and control . 18
5.5.4 Monitoring . 21
5.5.5 Maintenance . 21
6 Islanded grid application . 21
6.1 Application of the EES system . 21
6.1.1 Functional purpose . 21
6.1.2 Applications related requirements . 21
6.2 Conditions and requirements for connection to the grid . 21
6.2.1 Grid parameters at the intended POC . 21
6.2.2 Service conditions . 21
6.2.3 Requirements and restrictions of the grid or system operator . 21
6.2.4 Standards and local regulations . 21
6.3 Design of the EES system . 22
6.3.1 Structure of the EES system . 22
6.3.2 Subsystem specifications . 23
6.3.3 Grid integration of the EES system . 23
6.3.4 Operation and control . 23

6.3.5 Monitoring . 24
6.3.6 Maintenance . 24
6.3.7 Communication interface . 24
6.4 Sizing and resulting parameters of the EES system . 24
6.4.1 Sizing . 24
6.4.2 Characteristics and restrictions of the EES system . 26
6.5 Service life of the EES system . 26
6.5.1 Installation . 26
6.5.2 Performance assessment . 26
6.5.3 Operation and control . 26
6.5.4 Monitoring . 27
6.5.5 Maintenance . 27
7 Backup power supply and emergency support . 28
7.1 Applications of the EES system. 28
7.1.1 Functional purpose of the EES system. 28
7.1.2 Applications related requirements . 28
7.2 Conditions and requirements for connection to the grid . 28
7.3 Design of the EES system . 28
7.3.1 Structure of the EES systems . 28
7.3.2 Subsystem specifications and requirements . 28
7.3.3 Grid integration of the EES system . 28
7.3.4 Operation and control . 32
7.3.5 Monitoring . 32
7.3.6 Maintenance . 32
7.3.7 Communication interface . 32
7.4 Sizing and resulting parameters of the EES system . 33
7.4.1 Sizing . 33
7.4.2 Characteristics and restrictions of the EES system . 34
7.5 Service life of the EES system . 34
7.5.1 Installation . 34
7.5.2 Performance assessment . 35
7.5.3 Operation and control . 35
7.5.4 Monitoring . 39
7.5.5 Maintenance . 39
Annex A (informative) Technology dependent requirements for grid interconnection
scheme . 40
Annex B (informative) Specific requirements for battery-based EES systems . 44
Bibliography . 46

Figure 1 – An example of peak shaving and fluctuation reduction of consumption
consisting of charge and discharge events . 13
Figure 2 – One charge and one discharge duty cycle for peak shaving application . 14
Figure 3 – Two charges and two discharges duty cycle for peak shaving application. 15
Figure 4 – Use case for information exchange between grid and EES system . 16
Figure 5 – Process to determine the sizing and planning of the EES system applied in
peak shaving and fluctuation reduction of consumption applications . 17
Figure 6 – Sequence of charging events in peak shaving application . 19
Figure 7 – Sequence of discharging events in peak shaving application . 20

– 4 – IEC TS 62933-3-3:2022  IEC 2022
Figure 8 – Example configuration for applying an EES system to an islanded grid
containing distributed energy resources . 23
Figure 9 – Example process to determine the sizing and planning of EES system

applied in islanded grid application . 25
Figure 10 – Example use case for backup power using a diesel generator . 29
Figure 11
...