1、BRITISH STANDARD BS EN 60255-24:2001 IEC 60255-24:2001 Electrical relays Part 24: Common format for transient data exchange (COMTRADE) for power systems The European Standard EN 60255-24:2001 has the status of a British Standard ICS 29.120.70 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY
2、COPYRIGHT LAWBS EN 60255-24:2001 This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 September 2001 BSI 08-2001 ISBN 0 580 38286 9 National foreword This Bri
3、tish Standard is the official English language version of EN 60255-24:2001. It is identical with IEC 60255-24:2001. The UK participation in its preparation was entrusted to Technical Committee PEL/95, Measuring relays and protection systems, which has the responsibility to: A list of organizations r
4、epresented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the o
5、ther, publications may contain identifiers from both systems. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Inde
6、x”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself co
7、nfer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promul
8、gate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 53, and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Com
9、mentsEUROPEAN STANDARD EN 60255-24 NORME EUROPENNE EUROPISCHE NORM July 2001 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 200
10、1 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60255-24:2001 E ICS 29.120.70 English version Electrical relays Part 24: Common format for transient data exchange (COMTRADE) for power systems (IEC 60255-24:2001) Relais lectrique
11、s Partie 24: Format commun pour lchange de donnes transitoires (CONTRADE) dans les rseaux lectriques (CEI 60255-24:2001) Elektrische Relais Teil 24: Standardformat fr den Austausch von transienten Daten elektrischer Energieversorgungsnetze (COMTRADE) (IEC 60255-24:2001) This European Standard was ap
12、proved by CENELEC on 2001-05-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such na
13、tional standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own langu
14、age and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, S
15、pain, Sweden, Switzerland and United Kingdom.EN 55206-24:0021 - 2 - Foreword The text of document 95/120/FDIS, future edition 1 of IEC 60255-24, prepared by IEC TC 95, Measuring relays and protection equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60255-24
16、 on 2001-05-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2002-02-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2002-
17、02-01 Annexes designated “informative“ are given for information only. In this standard, annexes A to E are informative. _ Endorsement notice The text of the International Standard IEC 60255-24:2001 was approved by CENELEC as a European Standard without any modification. In the official version, for
18、 Bibliography, the following notes have to be added for the standards indicated: IEC 60027-2 NOTE Harmonized with IEC 60027-2A and IEC 60027-2B as HD 245.2 S1:1983 (not modified). IEC 60027-3 NOTE Harmonized as HD 245.3 S2:1991 (modified). IEC 60027-4 NOTE Harmonized as HD 245.4 S1:1987 (modified).
19、IEC 60044-1 NOTE Harmonized as EN 60044-1:1999 (modified). _ Page2 EN6025524:2001 BSI08200160255-24 IEC:2001 3 CONTENTS INTRODUCTION 6 1 Scope and object . 7 2 Definitions 7 2.1 data representation. 7 2.2 critical/non-critical. 8 2.3 primary/secondary ratios . 8 2.4 floating point notation 8 2.5 cat
20、egories of files 9 2.6 methods of accessing data in files10 2.7 data separators, delimiters, field lengths, data minimum and maximum values .11 3 COMTRADE files 12 3.1 Header file (xxxxxxxx.HDR) .12 3.2 Configuration file (xxxxxxxx.CFG) 12 3.3 Data file (xxxxxxxx.DAT)12 3.4 Information file (xxxxxxx
21、x.INF) .13 4 Header files 13 4.1 Content13 4.2 Filenames14 4.3 Format.14 5 Configuration files .14 5.1 Content14 5.2 Filenames14 5.3 Format.14 5.3.1 Station name, identification and revision year .15 5.3.2 Number and type of channels .15 5.3.3 Analog channel information 16 5.3.4 Status (digital) cha
22、nnel information.17 5.3.5 Line frequency .18 5.3.6 Sampling rate information.18 5.3.7 Date/time stamps .19 5.3.8 Data file type19 5.3.9 Time stamp multiplication factor .20 5.4 Missing data in configuration files.20 5.5 Configuration file layout20 6 Data files 20 6.1 Content21 6.2 Data filenames.21
23、6.3 ASCII data file format.21 6.4 Example of an ASCII data sample 22 6.5 Binary data files .22 6.6 Example of binary data sample 24 Page3 EN6025524:2001 BSI08200160255-24 IEC:2001 4 7 Information files 24 7.1 Content25 7.2 Information file filenames .25 7.3 Information file structure 25 7.3.1 Public
24、 sections.26 7.3.2 Private sections .26 7.4 File characteristics.26 7.5 Section headings .26 7.5.1 Public and private section header name formatting rules.26 7.5.2 Public section header naming examples .27 7.5.3 Private section header naming examples27 7.6 Entry line .27 7.6.1 Comment lines.28 7.6.2
25、 Value string28 7.7 Adding, modifying and deleting information.29 7.7.1 Deleting information .29 7.7.2 Adding information .29 7.8 Public section header and entry line definitions.29 7.9 Public record information section .29 7.9.1 Section header definition29 7.9.2 Public record information entry line
26、 definition30 7.10 Public event information definitions 31 7.10.1 Section heading definition 31 7.10.2 Public event information entry line definition .31 7.11 Public file description section .32 7.11.1 Section heading definition 32 7.11.2 Public file description entry line definition .32 7.12 Public
27、 analog channel section 33 7.12.1 Section heading definition 33 7.12.2 Public analog channel entry line definition 33 7.13 Public status channel section .33 7.13.1 Section heading definition 34 7.13.2 Public status channel entry line definition .34 7.14 Sample .INF file .34 Annex A (informative) Sou
28、rces and exchange medium for transient data.36 A.1 Digital fault recorders.36 A.2 Analog tape recorders36 A.3 Digital protective relays36 A.4 Transient simulation programs .36 A.5 Analog simulators 37 A.6 Data exchange medium37 Page4 EN6025524:2001 BSI08200160255-24 IEC:2001 5 Annex B (informative)
29、Data exchange sampling rates38 B.1 Introduction38 B.2 Sampling process structure38 B.3 Interpolation.41 Annex C (informative) Sample file.42 Annex D (informative) Sample program for sampling frequency conversion.48 Annex E (informative) Sample applications of conversion factors 51 Bibliography 53 Fi
30、gure 1 Example of data sample in ASCII format .22 Figure 2 Example of data sample in binary format.24 Figure B.1 Typical signal processing.38 Figure B.2 DSP solution39 Figure B.3 Example of sample rate conversion40 Page5 EN6025524:2001 BSI08200160255-24 IEC:2001 6 INTRODUCTION This part of IEC 60255
31、 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 rapid evolution and implementation of digital devices for fault and transient data recording and testing in the electric utility industry have generated
32、 the need for a standard format for the exchange of data. This data is being used with various devices to enhance and automate the analysis, testing, evaluation and simulation of power systems and related protection schemes during fault and disturbance conditions. Since each source of data may use a
33、 different proprietary format, a common data format standard is necessary to facilitate the exchange of such data between applications. This facilitates the use of proprietary data in diverse applications and allows users of one proprietary system to use digital data from other systems. Page6 EN6025
34、524:2001 BSI08200160255-24 IEC:2001 7 ELECTRICAL RELAYS Part 24: Common format for transient data exchange (COMTRADE) for power systems 1 Scope and object This part of IEC 60255 defines a format for files containing transient waveform and event data collected from power systems or power system model
35、s. This standard applies to files stored on physical media such as digital hard drives and diskettes. It is not a standard for transferring data files over communication networks. The format is intended to provide an easily interpretable format for use in exchanging data; as such, it does not make u
36、se of the economies available from data encoding and compression which proprietary formats depend on for competitive advantage. 2 Definitions For the purpose of this part of IEC 60255, the following definitions apply. 2.1 data representations data stored in files as a series of binary bits NOTE Each
37、 bit can be either a 1 or a 0. The bits are organized in groups of 8 bits called bytes. When a computer reads the data in a file, it reads the data as a series of bytes. 2.1.1 binary data data organized in the form of bytes NOTE The 8 bits in a byte can be organized in 256 different combinations. Th
38、ey can be used, therefore, to represent the numbers from 0 to 255. If larger numbers are needed, several bytes can be used to represent a single number, e.g., 2 bytes (16 bits) can represent the numbers from 0 to 65535. When the bytes are interpreted in this fashion, they are known as binary data. S
39、everal different formats are in common use for storage of numeric data in binary form. 2.1.2 ASCII (American National Standard Code for Information Interchange) data symbols that match 127 of the combinations of eight binary bits NOTE As an alternative to a byte representing the numbers 0 to 255, it
40、 can be used to represent 255 different symbols. The American National Standard Code for Information Interchange (ASCII) is a standard that lists symbols that match 127 of the combinations of eight binary bits, e.g. the byte 01000001 represents an upper case “A” while 01100001 represents a lower cas
41、e “a”. With 127 different combinations, it is possible to represent all of the keys on the keyboard plus many other special symbols. The remainder of the 256 combinations available from an 8-bit format are used for drawing and other special application characters. To represent a number in ASCII form
42、at requires one byte for each digit of the number. Page7 EN6025524:2001 BSI08200160255-24 IEC:2001 8 2.2 critical/non-critical some of the data in the configuration file is not absolutely necessary for the reproduction of the sample data, and some variables provided for in the configuration file may
43、 not be relevant to a particular application. Such data may be described as non-critical and may be omitted. An example of such non-critical data is the recording device channel name. However, the position normally occupied by such variables must be maintained in order to maintain the integrity of t
44、he file. If data is described as non-critical in any section of the standard, the position may be left empty or filled, using the space character, and the corresponding data separator following the preceding data separator applied with no intervening characters or spaces. Any data which is necessary
45、 for the reproduction of the sample data is termed critical. If such data is missing, the file may be unusable. 2.3 primary/secondary ratios the devices used to measure and record events on a high voltage system are not capable of directly accepting the high voltage and high currents of the power sy
46、stem. These devices are built to accept inputs in more manageable and less dangerous levels, termed secondary quantities. Voltage transformers and current transformers are used to reduce the voltage and current signals on the power system to these lower values. The transformer ratios are chosen so t
47、hat when the power system is running at the rated or nominal primary value, the secondary value is at the nominal secondary value. The ratio is specified in primary:secondary order, the convention being that the primary is closest to the source of power. Primary ratings are available for all common
48、voltages and load values on the power system. Common values for the secondary values are in the region of 70 V line-to-ground, and 1 A or 5 A. An ANSI/IEEE standard 12 1)specifies the description and rating of these transformers. Thus for a current transformer applied to a feeder and rated at 800:5,
49、 the secondary current will be at the nominal 5 A value only when the primary load current was 800 A. Lower load values result in correspondingly lower values of secondary current. For three-phase applications, voltage transformers are normally rated in phase-to-phase voltage values rather than phase-to-ground. The output of a voltage transformer rated at 345 kV: 120 V will be 120 V phase-to-phase (70 V phase-to-ground) only when the primary system phase-to
