IEC TS 62933-3-3:2022

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
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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
...