prEN IEC 62933-3-1:2024

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

Elektrische Energiespeichersysteme – Teil 3-1: Planung und Leistungsbewertung von elektrischen Energiespeichersystemen – Allgemeine Festlegungen

Električne naprave za shranjevanje energije (EES) - 3-1. del: Načrtovanje in ocenjevanje delovanja sistemov za shranjevanje električne energije - Splošna specifikacija

General Information

• Status: Not Published
• Publication Date: 01-Mar-2026
• ICS: 13.020.30 - Environmental impact assessment
• Technical Committee: CLC/SR 120 - Electrical Energy Storage (EES) Systems
• Drafting Committee: IEC/TC 120 - Electrical Energy Storage (EES) Systems
• Current Stage: 4060 - Enquiry results established and sent to TC, SR, BTTF - Enquiry
• Start Date: 01-Nov-2024
• Completion Date: 01-Nov-2024
• Ref Project: oSIST prEN IEC 62933-3-1:2024 - Electrical energy storage (EES) systems - Part 3-1: Planning and performance assessment of electrical energy storage systems - General specification

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2024
Električne naprave za shranjevanje energije (EES) - 3-1. del: Načrtovanje in
ocenjevanje delovanja sistemov za shranjevanje električne energije - Splošna
specifikacija
Electrical energy storage (EES) systems - Part 3-1: Planning and performance
assessment of electrical energy storage systems - General specification
Ta slovenski standard je istoveten z: prEN IEC 62933-3-1:2024
ICS:
13.020.30 Ocenjevanje vpliva na okolje Environmental impact
assessment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

120/376/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62933-3-1 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-08-09 2024-11-01
SUPERSEDES DOCUMENTS:
120/328/CD, 120/344/CC
IEC TC 120 : ELECTRICAL ENERGY STORAGE (EES) SYSTEMS
SECRETARIAT: SECRETARY:
Japan Mr Masatake SAKUMA
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

TC 8,TC 21,TC 22,TC 57,TC 69
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY

SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the
final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

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

PROPOSED STABILITY DATE: 2031
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

IEC CDV 62933-3-1 © IEC 2024 2 120/376/CDV

NOTE FROM TC/SC OFFICERS:
TC 120 Secretary checked 120/328/CD, 120/344/CC and CDV Word file respectively and the update
was confirmed.
120/376/CDV 3 IEC CDV 62933-3-1 © IEC 2024

1 CONTENTS
2 CONTENTS . 3
3 FOREWORD . 8
4 INTRODUCTION . 10
5 1 Scope . 11
6 2 Normative references . 11
7 3 Terms, definitions and symbols. 12
8 3.1 Terms and definitions . 12
9 3.2 Symbols . 12
10 4 General about EES systems . 13
11 4.1 Main functional aspects . 13
12 4.2 Architecture of an EES system . 13
13 4.3 Subsystem specifications . 14
14 4.3.1 General . 14
15 4.3.2 Accumulation subsystem . 15
16 4.3.3 Power conversion subsystem . 16
17 4.3.4 Auxiliary subsystem . 17
18 4.3.5 Control subsystem . 17
19 4.4 Main electrical parameters of EES systems . 19
20 4.4.1 General . 19
21 4.4.2 Active input and output power rating . 19
22 4.4.3 Rated energy storage capacity . 20
23 4.4.4 Response time performances . 20
24 4.4.5 Rated reactive power . 20
25 4.4.6 Auxiliary power consumption . 21
26 4.4.7 Self-discharge . 21
27 4.4.8 Roundtrip efficiency . 21
28 4.4.9 Duty cycle roundtrip efficiency . 21
29 4.4.10 Recovery time . 21
30 4.4.11 Asset lifetime and end-of-service life values . 21
31 5 Planning and design of EES systems . 23
32 5.1 General . 23
33 5.2 Overview EES system planning and design process . 23
34 5.3 Functional purpose and applications of EES systems . 26
35 5.3.1 General . 26
36 5.3.2 Power intensive applications . 26
37 5.3.3 Renewable energy sources integration related applications . 26
38 5.3.4 Energy intensive applications . 27
39 5.3.5 Backup power applications . 27
40 5.3.6 Multi-function applications . 27
41 5.4 Duty cycle at primary POC . 28
42 5.5 Selection of the EES system and preliminary sizing . 30
43 5.5.1 Requirements and constraints for EES system sizing . 30
44 5.5.2 Preliminary sizing procedure according to duty cycle and primary POC . 33

IEC CDV 62933-3-1 © IEC 2024 4 120/376/CDV

45 5.6 EES system environment . 35
46 5.6.1 General . 35
47 5.6.2 Grid parameters and requirements . 35
48 5.6.3 Grid integration of the EES systems . 36
49 5.6.4 Service conditions . 37
50 5.6.5 Standards and local regulations . 39
51 5.7 Conditions and requirements for connection to the grid . 40
52 5.7.1 Requirements and restrictions of the grid or system operator . 40
53 5.8 Operational requirements . 41
54 5.8.1 Monitoring . 41
55 5.8.2 Maintenance . 43
56 5.9 Final sizing . 43
57 5.9.1 Considerations for final sizing . 43
58 5.9.2 Final sizing results . 51
59 5.10 Control subsystem . 53
60 5.10.1 Control subsystem aspects . 53
61 5.10.2 Operation states of control subsystem . 54
62 5.10.3 Operation and control . 62
63 5.11 Communication interface. 63
64 5.11.1 Communication interface (to external systems) . 63
65 5.11.2 Information model for an EES system . 63
66 5.11.3 Remote monitoring and control . 65
67 6 Performance assessment and service life of EES system . 71
68 6.1 Factory acceptance test (FAT) . 71
69 6.2 Installation and commissioning . 71
70 6.2.1 General . 71
71 6.2.2 Installation phase . 72
72 6.2.3 Commissioning phase . 73
73 6.3 Site acceptance test (SAT) . 75
74 6.4 Lifetime of EES systems . 75
75 6.4.1 General . 75
76 6.4.2 Performance assessment . 75
77 6.4.3 Performance monitoring phase . 76
78 6.5 EES system decommissioning . 77
79 6.6 Inspection and test aspects . 77
80 Annex A (informative) EES system applications . 82
81 A.1 EES system for power support at an electric charging station . 82
82 A.2 EES system designed for frequency control . 84
83 A.2.1 General . 84
84 A.2.2 Example of an EES system for primary frequency control . 84
85 A.2.3 Example of an EES system for secondary frequency control . 86
86 A.2.4 Example of an EES system for dynamic frequency control . 87
87 A.3 EES system in conjunction with renewable energy production . 89
88 A.3.1 General . 89
89 A.3.2 Example of EES system for renewable (energy) firming . 89

120/376/CDV 5 IEC CDV 62933-3-1 © IEC 2024

90 A.3.3 Example of EES system for renewable (power) smoothing . 90
91 A.3.4 Example of EES system in PV-EESS-EV charging station application . 91
92 A.3.5 Example of EES system as a black start resource for PV plant . 93
93 A.4 EES system for grid support applications . 93
94 A.4.1 Example of an EES system for grid voltage support (Q(U) control mode) . 93
95 A.4.2 Example of an EES system for power quality support by voltage-related
96 active
...