1、BRITISH STANDARD BS 7494-2: 1993 IEC 834-2: 1993 Incorporating Amendment No. 1 Performance and testing of teleprotection equipment of power systems Part 2: Analogue comparison system (Implementation of CENELEC HD 543.2.S1)BS7494-2:1993 This British Standard, having been prepared under the direction
2、of the Power Electrical Engineering Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 October 1993 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference PEL/89 Draft for comment 89/33072 DC ISB
3、N 0 580 22558 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Power Electrical Engineering Standards Policy Committee (PEL/-) to Technical Committee PEL/89, upon which the following bodies were represented: Association of Consulting En
4、gineers BAMEMA (BEAMA) BEAMA Ltd. EEA (the Association of Electronics, Telecommunications and Business Equipment Industries) Electricity Supply Industry in United Kingdom GAMBICA (BEAMA Ltd.) North of Scotland Hydro-Electric Board Telecommunication Engineering and Manufacturing Association Transmiss
5、ion and Distribution Association (BEAMA Ltd.) Amendments issued since publication Amd. No. Date Comments 8786 September 1995 Indicated by a sideline in the marginBS7494-2:1993 BSI 12-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Section 1. General 1.1
6、 Scope and object 3 1.2 Normative references 3 1.3 Service conditions 3 1.4 Telecommunication system used 4 Section 2. Terminology 4 Section 3. Characteristic of analogue comparison teleprotection schemes 3.1 Arrangement of teleprotection schemes and their associated interfaces 4 3.2 Teleprotection
7、operating time (T Aor T O ) 5 3.3 Protection operating time (T Bor T p ) 5 Section 4. Requirements 4.1 General equipment interface requirements 6 4.2 Specific power supply requirements 7 4.3 Operational requirements 7 Section 5. Methods for performance testing 5.1 General equipment interface tests 9
8、 5.2 Specific power supply tests 10 5.3 Teleprotection system performance tests 10 5.4 Checking alarm functions 15 Annex A (informative) Types of analogue comparison protection systems and associated teleprotection schemes 24 Annex B (informative) The binary symmetric channel (BSC) model 26 Annex C
9、(informative) Bibliography 26 Figure 1 Arrangement of analogue comparison protection system 16 Figure 2 Typical operating times for analogue comparison protection systems 17 Figure 3 Parameters for overall teleprotection channel tests and recommended setting values of the protection 18 Figure 4 Esti
10、mated examples of probability of missing command versus signal-to-noise for a typical phase comparison protection 19 Figure 5 Test set-up for dependability measurement analogue teleprotection channel 20 Figure 6 Test set-up for security measurement (analogue teleprotection channel) 20 Figure 7 Test
11、set-up for dependability measurement (digital teleprotection channel) 21 Figure 8 Test set-up for security measurement (digital teleprotection channel) 21 Figure 9 Estimated example of probability of unwanted commands versus signal-to-noise for a typical phase comparison protection 22 Figure 10 Esti
12、mated example of probability of unwanted commands versus BER for a typical current differential protection on a digital teleprotection channel 23 Figure A.1 General view of analogue schemes 25 List of references Inside back coverBS7494-2:1993 ii BSI 12-1999 National foreword This Part of BS 7494 has
13、 been prepared under the direction of the Power Electrical Engineering Standards Policy Committee. It is identical with IEC 834-2:1993 Performance and testing of teleprotection equipment of power systems Part 2: Analogue comparison systems published by the International Electrotechnical Commission (
14、IEC). In 1995 the European Committee for Electrotechnical Standardization (CENELEC) accepted the text of IEC 834-2:1993, with common modifications, as Harmonization Document HD 543.2.S1. The Technical Committee has reviewed the provisions of IEC 255-4:1976, IEC255-6:1988 and IEC 834-1:1988, to which
15、 normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. There are no equivalent British Standards. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsib
16、le for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International Standard Corresponding British Standard IEC 50(151):1978 BS 4727 Glossary of electrotechnical, power, telecommunication, electronics, lightin
17、g and colour terms Part 1:Group 02:1980 Electrical and magnetic devices terminology (Technically equivalent) IEC 255-5:1977 BS 5992 Electrical relays Part 3:1980 Specification for the insulation testing of electrical relays (Identical) IEC 255-22-1:1988 BS 142 Electrical protection relays Subsection
18、 1.4.1:1990 1 MHz burst disturbance tests (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theHD title page, pages2 to 28, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments
19、incorporated. This will be indicated in the amendment table on the inside front cover.HARMONIZATION DOCUMENT DOCUMENT DHARMONISATION HARMONISIERUNGSDOKUMENT HD 543.2 S1 February 1995 ICS 25.040.40 Descriptors: Telecommunication, electric power system, teleprotection equipment, analogue comparison sy
20、stem, characteristic, interface, digital technique, comparison, reliability, safety, protection, performance, testing English version Performance and testing of teleprotection equipment of power systems Part 2: Analogue comparison systems (IEC 834-2:1993, modified) This Harmonization Document was ap
21、proved by CENELEC on 1994-12-06. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this Harmonization Document on a national level. Up-to-date lists and bibliographical references concerning national national implementa
22、tion may be obtained on application to the Central Secretariat or to any CENELEC member. This Harmonization Document exists in three official versions (English, French, German). CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greec
23、e, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat:
24、rue de Stassart 35, B-1050 Brussels 1995 Copyright reserved to CENELEC members Ref. No. HD 543.2 S1:1995 EBS 7494-2:1993 BSI 12-1999 2 Foreword The text of the International Standard IEC 834-2:1993, prepared by IEC TC 57, Telecontrol, teleprotection and associated telecommunications for electric pow
25、er systems, together with common modifications prepared by Reporting Secretariat SR57, was submitted to the formal vote and was approved by CENELEC as HD543.2 S1 on 1994-12-06. NOTEAustria has no obligation to implement this European Standard. The following dates were fixed: Annexes designated “norm
26、ative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this standard, Annex ZA is normative and Annex A, Annex B, and Annex C are informative. Annex ZA has been added by CENELEC. HD 543 consists of the following parts, under the general Perfo
27、rmance and testing of teleprotection equipment of power systems: Part 1:1991, Narrow-band command systems (IEC 834-1:1988, modified); Part 2:1995, Analogue comparison systems (IEC 834-2:1993, modified). latest date by which the existence of the HD has to be announced at national level (doa) 1995-06-
28、01 latest date by which the HD has to be implemented at national level by publication of a harmonized national standard or by endorsement (dop) 1995-12-01 latest date by which the national standards conflicting with the HD have to be withdrawn (dow) 1995-12-01BS7494-2:1993 BSI 12-1999 3 Section 1. G
29、eneral 1.1 Scope and object This part of IEC 834 applies to narrowband and wideband teleprotection systems used to convey analogue information about the primary quantities such as phase or phase and amplitude. The teleprotection equipment can either be separate or integrated in one unit with the pro
30、tection equipment or the telecommunication equipment. Narrow-band systems include systems operating within a 4 kHz band (for each direction of transmission). Wide-band systems include systems occupying more than 4 kHz bandwidth (for each direction of transmission). Broad-band command systems are not
31、 dealt with in this standard. The object of this part of IEC 834 is to establish performance requirements and recommended testing methods for analogue comparison teleprotection equipments used in connection with power network protection systems and to define the associated terminology. The informati
32、on conveyed and compared such as phase or phase and amplitude quantities can be in analogue or digital form. In addition to the power supply and the interfaces belonging to the teleprotection equipment, the performance of the teleprotection equipment in conjunction with the protection equipment shal
33、l be tested. All the tests should be considered as type tests seeIEC 50(151). 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 834. At the time of publication, the editions indicated were va
34、lid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 834 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid In
35、ternational Standards. IEC 50(151):1978, International Electrotechnical Vocabulary (IEV) Chapter 151: Electrical and magnetic devices. IEC 255-4:1976, Electrical relays Part 4: Single input energizing quantity measuring relays with dependent specified time. IEC 255-5:1977, Electrical relays. Part 5:
36、 Insulation tests for electrical relays. IEC 255-6:1988, Electrical relays. Part 6: Measuring relays and protection equipment. IEC 255-22-1:1988, Electrical relays Part 22: Electrical disturbance tests for measuring relays and protection equipment Section 1: 1 MHz burst disturbance tests. IEC 834-1:
37、1988, Performance and testing of teleprotection equipment of power systems Part 1: Narrow-band command systems. CCITT Recommendation V.11:1976, Electrical characteristics for balanced double-current interchange circuit for general use with integrated circuit equipment in the field of data communicat
38、ions. CCITT Red Book, volume VIII fascicle VIII.1, 1985. CCITT Recommendation V.28:1972, Electrical characteristics for unbalanced double-current interchange circuits. CCITT Red Book, volume VIII fascicle VIII.1, 1985. CCITT Recommendation G.703:1972, Physical/electrical characteristics of hierarchi
39、cal digital interfaces. CCITT Red Book, volume III fascicle III.3, 1985. CIGR SC 34 and 35 WG 05:1987, Protection systems using telecommunication. CIGR SC 35:1979, Guide on power line carrier. 1.3 Service conditions 1.3.1 Ambient conditions The stated performance requirements shall be satisfied for
40、the following conditions: 1.3.2 Supply voltage with battery operation (See 3.2 of IEC 834-1.) 1.3.3 Supply voltage with a.c. mains operation The stated performance requirements shall be satisfied for the following conditions: temperature range 5 C + 40 C maximum rate of change 10 C/h relative humidi
41、ty 5 % to 95 % maximum water content 28 g/m 3 voltage tolerance + 10 % to 15 % frequency tolerance 5 % harmonic content 10%BS7494-2:1993 4 BSI 12-1999 1.3.4 Storage conditions (See 3.4 of 834-1.) 1.4 Telecommunication system used Figure 1 shows the configuration of a teleprotection system and applie
42、s to both narrow-band and wide-band systems. The signals are conveyed from the transmitter to the receiver via a telecommunication system which has to be capable of transmitting the required bandwidths in accordance with certain parameters, for example group delay distortion, frequency/attenuation r
43、esponse, etc. The telecommunication systems should be chosen with care, as they will be influenced by noise, changes of parameters and any kind of interference which may cause maloperation or non-operation of the teleprotection equipment. The telecommunication systems that can be used are listed in
44、clause 4 of IEC 834-1. Section 2. Terminology Terminology not defined by IEC but often used is listed in this section. 2.1 analogue protection system (CIGR SC 34/35-WG 05) a protection system using telecommunication in which analogue power quantities are transmitted from one end of a power line by t
45、he telecommunication system either in analogue or digital form for comparison at the other end examples: phase comparison protection system, longitudinal differential protection system 2.2 dependability (CIGR SC 34/35-WG 05) the probability of not having a failure to trip operation 2.3 fault clearan
46、ce time (T c ) (clearing time) (CIGR SC 34/35-WG 05) the time interval between the instant of occurrence of a fault and the instant of the fault clearance by the automatic tripping of the appropriate circuit breakers. The fault clearance time is the sum of the protection system operating time and ci
47、rcuit breaker operating time 2.4 non-segregated protection system (CIGR SC 34/35-WG 05) a protection system using a mixing transformer or phase sequence network or other means to supply one protection equipment common for all three power phases 2.5 propagation time (CIGR SC 34/35-WG 05) the time ela
48、psed between the instant of application to a telecommunication system, under stated conditions, of a specific value of the transmitted signal and the instant when the received signal assumes the corresponding value at the input of the teleprotection receiver 2.6 security (CIGR SC 34/35-WG 05) the pr
49、obability of not having an unwanted operation 2.7 segregated protection (CIGR SC 34/35-WG 05) normally consists of one protection for each phase (Compare with non-segregated protection.) 2.8 teleprotection channel See 5.10 b) of IEC834-1 NOTEThe teleprotection channel may be either analogue or digital. In an analogue teleprotection channel the instantaneous value of the signal varies continuously, even though the information may be of a digital nature (e.g. FSK signalling). In
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