IEC TS 62933-3-1:2018

Electrical energy storage (EES) systems - Part 3-1: Planning and performance assessment of electrical energy storage systems - General specification

IEC/TS 62933-3-1:2018(E) is applicable to EES systems designed for grid-connected indoor or outdoor installation and operation. This document considers
necessary functions and capabilities of EES systems
test items and performance assessment methods for EES systems
requirements for monitoring and acquisition of EES system operating parameters
exchange of system information and control capabilities required

General Information

• Status: Published
• Publication Date: 28-Aug-2018
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• 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: 30-Aug-2018
• Completion Date: 29-Aug-2018

Standards Content (Sample)

IEC TS 62933-3-1 ®
Edition 1.0 2018-08
TECHNICAL
SPECIFICATION
colour
inside
Electrical energy storage (EES) systems –
Part 3-1: Planning and performance assessment of electrical energy storage
systems – General specification

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [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 corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: [e-mail].
IEC TS 62933-3-1 ®
Edition 1.0 2018-08
TECHNICAL
SPECIFICATION
colour
inside
Electrical energy storage (EES) systems –

Part 3-1: Planning and performance assessment of electrical energy storage

systems – General specification

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.020.30 ISBN 978-2-8322-5973-3

– 2 – IEC TS 62933-3-1:2018 © IEC 2018
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and symbols. 9
3.1 Terms and definitions . 9
3.2 Symbols . 9
4 General structure of EES systems . 9
4.1 Architecture of an EES system . 9
4.2 Subsystem specifications . 10
4.2.1 Accumulation subsystem . 10
4.2.2 Power conversion subsystem . 11
4.2.3 Auxiliary subsystem . 11
4.2.4 Control subsystem . 11
5 Planning of EES systems . 12
5.1 General . 12
5.2 EES system environment . 13
5.2.1 General . 13
5.2.2 Grid parameters and requirements. 13
5.2.3 Service conditions . 14
5.2.4 Standards and local regulations . 15
5.3 Sizing of EES systems . 15
5.3.1 Requirements at primary POC . 15
5.3.2 Sizing recommendations . 16
5.4 Main electrical parameters of EES systems . 17
5.4.1 General . 17
5.4.2 Input and output power rating . 17
5.4.3 Rated energy capacity . 18
5.4.4 Auxiliary power consumption . 18
5.4.5 Self-discharge . 18
5.4.6 Roundtrip efficiency . 18
5.4.7 Duty cycle roundtrip efficiency . 19
5.4.8 Recovery times . 19
5.4.9 End-of-service life values . 19
5.5 Functional system performance . 20
5.5.1 General . 20
5.5.2 Operation states of control subsystem . 22
5.5.3 Grid frequency support . 22
5.5.4 Islanding control and black start capability . 23
5.5.5 Active power limitation . 23
5.5.6 Manual active power control . 24
5.5.7 Pattern active power control . 24
5.5.8 Automatic load following control . 25
5.5.9 Power control modes for grid voltage support . 25
5.6 Communication interface. 27
5.6.1 General . 27

5.6.2 Information model for an EES system . 27
5.6.3 Remote monitoring and control . 29
6 EES system performance assessment . 33
6.1 Factory acceptance test (FAT) . 33
6.2 Installation and commissioning . 34
6.2.1 General . 34
6.2.2 Installation phase . 34
6.2.3 Commissioning phase . 34
6.3 Site acceptance test (SAT) . 35
6.4 Performance monitoring phase . 36
Annex A (informative) Examples of EES system applications . 38
A.1 EES system designed for reserve control . 38
A.1.1 General . 38
A.1.2 Example of an EES system for primary frequency control . 38
A.1.3 Example of an EES system for secondary frequency control . 39
A.1.4 Example of an EES system for dynamic frequency control . 40
A.2 EES system in conjunction with renewable energy production . 42
A.2.1 General . 42
A.2.2 Example of EES system for renewable (energy) firming . 42
A.2.3 Example of EES system for renewable (power) smoothing . 43
A.3 EES system for grid support applications . 44
A.3.1 Example of an EES system for grid voltage support (Q(U) control mode) . 44
A.3.2 Example of an EES system for power quality support by voltage-related
active power injection . 47
Annex B (informative) Aspects to be considered with regard to EES system installation . 49
B.1 Site-assembling . 49
B.2 Protection against disaster – Fire prevention . 49
B.3 Transportation and on-site storage . 49
Bibliography . 50

Figure 1 – Typical architectures of EES systems . 10
Figure 2 – Example of classification of EES systems according to energy form . 11
Figure 3 – Sample performance versus time characteristics for EES systems . 19
Figure 4 – Sample consideration to design the service life of EES systems . 20
Figure 5 –Example of EES system operation states . 22
Figure 6 – Example for P(f) strategy . 23
Figure 7 – Example of setting of active output power at primary POC . 24
Figure 8 – Example of day pattern operation at primary POC . 25
Figure 9 – Example of peak shaving application . 25
Figure 10 – Example of a general control characteristic . 26
Figure 11 – Reference diagram for information exchange . 27
Figure 12 – EES system as an aggregation of several EES systems at the same
primary POC . 28
Figure A.1 – Sample duty cycle for a primary frequency control application with 30-s
power output every 30 min shown over 2 h . 38
Figure A.2 – Sample power output for a secondary frequency control application with
20-min power output over 3 h . 40

– 4 – IEC TS 62933-3-1:2018 © IEC 2018
Figure A.3 – Sample output power of an EES system for a dynamic frequency control
application in spring, summer, autumn and winter . 41
Figure A.4 – Sample output power of an EES system in a renewable (solar) energy

firming application . 43
Figure A.5 – Sam
...