IEC 60255-24:2013

Measuring relays and protection equipment - Part 24: Common format for transient data exchange (COMTRADE) for power systems

IEC 60255-24:2013 defines a format for files containing transient waveform and event data collected from power systems or power system models. The format is intended to provide an easily interpretable form for use in exchanging data. The standard is for files stored on currently used physical media such as portable external hard drives, USB drives, flash drives, CD, and DVD. This standard defines a common format for the data files and exchange medium needed for the interchange of various types of fault, test, and simulation data. The main changes with respect to the previous edition are as follows:
- this new edition allows single file format (with extension .CFF) in lieu of four separate files;
- the single file with .CFF extension contains four sections of information corresponding to .CFG, .INF, .HDR, and .DAT. The DAT section is either in ASCII or Binary;
- the following additional data file types are also supported: binary32 and float32.

Relais de mesure et dispositifs de protection - Partie 24: Format commun pour l'échange de données transitoires (COMTRADE) dans les réseaux électriques

La CEI 60255-24:2013 établit un format pour les fichiers contenant des données sur les événements et les formes d'ondes des transitoires obtenus à partir des réseaux électriques ou de leur modélisation. Le format est destiné à fournir une forme facilement interprétable pour une utilisation dans l'échange de données. La norme est destinée aux fichiers stockés sur des supports physiques actuellement utilisés tels que des disques durs externes portables, des clés USB, des disques à mémoire flash, des CD et des DVD. La présente norme établit un format commun pour les fichiers de données et le support d'échange nécessaire pour échanger des données de différents types sur les défauts, les essais et la simulation. Les principales différences par rapport à l'édition précédente sont les suivantes:
- cette nouvelle édition autorise un seul format de fichier (avec extension .CFF) à la place de quatre fichiers séparés;
- l'unique fichier avec extension .CFF contient quatre sections d'information correspondant à .CFG, .INF, .HDR, et .DAT. La section DAT est en codage ASCII ou Binaire;
- les types de fichiers de données complémentaires suivants sont également pris en charge: binary32 et float32.

General Information

• Status: Published
• Publication Date: 29-Apr-2013
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.120.70 - Relays
• ICS: 33.120.30 - RF connectors
• Technical Committee: TC 95 - Measuring relays and protection equipment
• Current Stage: PPUB - Publication issued
• Start Date: 15-May-2013
• Completion Date: 30-Apr-2013

Relations

• Revises: IEC 60255-24:2001 - Electrical relays - Part 24: Common format for transient data exchange (COMTRADE) for power systems
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60255-24
Edition 2.0 2013-04
™
IEEE Std C37.111
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Measuring relays and protection equipment –
Part 24: Common format for transient data exchange (COMTRADE) for power
systems
Relais de mesure et dispositifs de protection –
Partie 24: Format commun pour l’échange de données transitoires (COMTRADE)
dans les réseaux électriques
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IEC 60255-24
Edition 2.0 2013-04
IEEE Std C37.111™
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Measuring relays and protection equipment –

Part 24: Common format for transient data exchange (COMTRADE) for power

systems
Relais de mesure et dispositifs de protection –

Partie 24: Format commun pour l’échange de données transitoires (COMTRADE)

dans les réseaux électriques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XB
ICS 29.120.70 ISBN 978-2-83220-766-6

– 2 – IEC 60255-24:2013
IEEE Std C37.111-2013
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 File and data storage . 9
4.1 Categories of files . 9
4.1.1 General . 9
4.1.2 Executable files . 10
4.1.3 Text files . 10
4.1.4 Data files . 10
4.2 Critical/non-critical data . 10
4.3 Data representation . 11
4.3.1 General . 11
4.3.2 Binary data . 11
4.3.3 ASCII data . 11
4.4 Data field delimiters and lengths. 11
4.4.1 General . 11
4.4.2 Carriage return/line feed delimiter . 11
4.4.3 Comma delimiter . 12
4.4.4 Field lengths . 12
4.5 Floating point notation for ASCII data . 12
4.6 Methods of accessing data in files . 13
4.6.1 General . 13
4.6.2 Random access files . 13
4.6.3 Sequential files . 13
4.7 Primary to secondary ratios . 14
5 COMTRADE files . 14
5.1 General . 14
5.2 Header file (.HDR) . 14
5.3 Configuration file (.CFG) . 15
5.4 Data file (.DAT) . 15
5.5 Information file (.INF) . 15
6 Header file . 15
6.1 General . 15
6.2 Content . 16
6.3 Filenames . 16
6.4 Format . 16
7 Configuration file . 16
7.1 General . 16
7.2 Content . 16
7.3 Filenames . 17
7.4 Format . 17
7.4.1 General . 17
Published by IEC under license from IEEE. © 2013 IEEE. All rights reserved.

IEEE Std C37.111-2013
7.4.2 Station name, identification and revision year . 17
7.4.3 Number and type of channels . 18
7.4.4 Analog channel information . 18
7.4.5 Status (digital) channel information . 20
7.4.6 Line frequency . 20
7.4.7 Sampling rate information . 20
7.4.8 Date/time stamps . 21
7.4.9 Data file type . 22
7.4.10 Time stamp multiplication factor . 22
7.4.11 Time information and relationship between local time and UTC . 22
7.4.12 Time quality of samples . 23
7.5 Missing data in configuration files . 24
7.6 Configuration file layout . 24
8 Data file . 24
8.1 General . 24
8.2 Content . 24
8.3 Data filenames . 24
8.4 ASCII data file format . 25
8.5 Example ASCII data sample . 26
8.6 Binary data files . 26
8.7 Example of binary data sample . 28
9 Information file . 28
9.1 General . 28
9.2 Content . 28
9.3 Information file filenames . 28
9.4 Information file structure . 28
9.4.1 General . 28
9.4.2 Public sections . 29
9.4.3 Private sections . 29
9.5 File characteristics . 29
9.6 Section headings . 30
9.6.1 Public and private section header name formatting rules . 30
9.6.2 Public section header naming examples . 30
9.6.3 Private section header naming examples . 30
9.7 Entry line . 30
9.7.1 General . 30
9.7.2 Comment lines. 31
9.7.3 Value string . 32
9.8 Adding, modifying, and deleting information . 32
9.8.1 General . 32
9.8.2 Deleting information . 32
9.8.3 Adding information. 32
9.9 Public section header and entry line definitions . 32
9.10 Public record information section . 32
9.10.1 General . 32
9.10.2 Section header definition .
...