1、BRITISH STANDARD BS 7602:1992 IEC 1085:1992 Guide to General considerations for telecommunication services for electrical power systemsBS7602:1992 This British Standard, having been prepared under the directionof the Power Electrical Engineering Standards Policy Committee, was published underthe aut
2、hority of the Standards Board and comes intoeffect on 15 September 1992 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference PEL/89 Draft for comment 89/33070 DC ISBN 0 580 21151 7 Committees responsible for this British Standard The preparation of this B
3、ritish 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 Engineers BAMEMA (BEAMA Ltd.) BEAMA Ltd. EEA (the Association of Electronics, Telecommunicat
4、ions and Business Equipment Industries) Electricity Supply Industry in United Kingdom GAMBICA (BEAMA Ltd.) North of Scotland Hydro-Electric Board Telecommunication Engineering and Manufacturing Association Transmission and Distribution Association (BEAMA Ltd.) Amendments issued since publication Amd
5、. No. Date CommentsBS7602:1992 BSI 08-1999 i Contents Page Committees responsible Inside front cover National foreword ii Introduction 1 1 Scope 1 2 Normative references to related International Standards and reports 1 2.1 General 1 2.2 Telecontrol 1 2.3 Teleprotection 1 2.4 Power line carrier (PLC)
6、 1 2.5 Radio 2 2.6 CCITT 2 2.7 Electro-magnetic compatibility 2 3 General 2 3.1 Functions 2 3.2 Telecommunication services 3 3.3 Summary 4 4 Service requirements 4 4.1 Telecommunication and operational services 4 4.2 Electro-magnetic compatibility (EMC) 11 4.3 Other requirements 12 5 Impact on telec
7、ommunication provision 13 5.1 Transmission media 13 5.2 Multiplex equipment 16 Figure 1 17 Figure 2 Administrative telephone service 18 Figure 3 Operational telephony 19 Figure 4 Telecontrol 20 Figure 5 Load management 21 Figure 6 Teleprotection 22 Figure 7 Mobile radio 23 Figure 8 Computing trafic
8、24 Figure 9 Typical hierarchical structure of a telecontrol system 25 Figure 10 26 Figure 11 Example of use of audio frequency pilot cables 27 Figure 12 Example of radio link 28 Figure 13 Example of optical fibre link 28 Table 1 Power system functions (to be satisfied by telecontrol) 7 Table 2 Telec
9、ontrol functions 8 List of references Inside back coverBS7602:1992 ii BSI 08-1999 National foreword This British Standard has been prepared under the direction of the Power Electrical Engineering Standards Policy Committee and is identical with IECPublication 1085:1992 General considerations for tel
10、ecommunication services for electric power systems, published by the International Electrotechnical Commission (IEC). The International Standard gives an overview of the telecommunication services needed to satisfy the operational, maintenance and administrative needs of electric power systems. The
11、Technical Committee has reviewed the provisions of IEC 353, IEC 481, IEC495, IEC 663, IEC 834 1)and IEC 1000 series to which reference is made in the text and has decided that they are acceptable for use in conjunction with this British Standard. A British Standard does not purport to include all th
12、e necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii,
13、 pages1 to 28, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Cross-references International Standard Corresponding British Standard IEC 50(3
14、71):1984 BS 4727 Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour terms Part 2 Terms particular to power engineering Group 12:1990 Telecontrol terminology (Technically equivalent) IEC 801 BS 6667 Electromagnetic compatibility for industrial-process measurement
15、 and control equipment BS 7404 Telecontrol equipment and systems IEC 870-1 Part 1 General considerations (Identical) IEC 870-2 Part 2 Operating conditions (Technically equivalent) IEC 870-3:1989 Part 3:1991 Specification for interfaces (electrical characteristics) (Identical) IEC 870-4:1990 Part 4:1
16、991 Specification for performance (Identical) IEC 870-5 Part 5 Transmission protocols (Identical) IEC 834-1:1988 BS 7494 Performance and testing of teleprotection equipment of power systems Part 1:1991 Specification for narrow-band command systems (Identical) 1) In preparation. BS7602:1992 BSI 08-19
17、99 1 Introduction The size and complexity of electric power systems in both developed and developing countries is growing rapidly and increasingly requires adequate telecommunication services to satisfy the operational, maintenance and administration needs. It is therefore useful to have a report gi
18、ving an overview of what is required which will assist in the planning of such services. These considerations are based on the CIGR paper (see 2.1) and on the relevant publications of IECTechnical Committee No. 57. As the technical possibilities and solutions for the provision of telecommunication s
19、ervices for electric power system depend very much on international and national standards, and there is also a need to satisfy the local PTT requirements as well as a need to co-exist with local radio/broadcasting services, this document is issued as a Technical Report and not as a standard. 1 Scop
20、e This Technical Report is intended to give an overview of the specific problems and requirements for electric power utility telecommunication systems. 2 Normative references to related International Standards and reports The following standards contains provisions which, through reference in this t
21、ext, constitute provisions of this Technical Report. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this Technical Report are encouraged to investigate the possibility of applying the most recent editions of th
22、e standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards. There are many International Standards and reports covering the topics considered in this report and the following subclauses detail those relevant to each aspect. 2.1 General Guide for pl
23、anning of power systems telecommunication systems (1985). 2) ANSI/IEEE STD 367:1987, IEEE recommended practises for determining the electric power station ground potential rise and induced voltage from a power fault. 2.2 Telecontrol In the area of telecontrol the IEC Technical Committee No. 57 is in
24、 the process of producing a very useful publication. This publication, IEC 870, consists of six parts as follows: IEC 870-1, Telecontrol equipment and systems Part 1: General considerations. IEC 870-2, Telecontrol equipment and systems Part 2: Operating considerations. IEC 870-3:1989, Telecontrol eq
25、uipment and systems Part 3: Interfaces (electrical characteristics). IEC 870-4:1990, Telecontrol equipment and systems Part 4: Performance requirements. IEC 870-5, Telecontrol equipment and systems Part 5: Transmission protocols. IEC 870-6, Telecontrol equipment and systems Part 6: Telecontrol proto
26、cols compatible with ISO and CCITT standards (under consideration). The following two documents, published by the IEC and IEEE respectively, are also very useful: IEC 50(371):1984, International Electrotechnical Vocabulary (IEV) Chapter 371: Telecontrol. IEEE P 565/D3 5-27-77, Manual of automatic an
27、d supervisory station control data organisation. 2.3 Teleprotection IEC Technical Committee No. 57 has produced the following standards on performance and testing of teleprotection equipment: IEC 834-1:1988, Performance and testing of teleprotection equipment of power systems Part1:Narrow-band comma
28、nd systems. IEC 834-2, Performance and testing of teleprotection equipment of power systems Part 2: Analogue comparison systems (in preparation). 2.4 Power line carrier (PLC) IEC Technical Committee No. 57 has produced the following standards: IEC 353:1989, Line traps for a.c. power systems. IEC 481
29、:1974, Coupling devices for power line carder systems. IEC 495:1974, Recommended values for characteristic input and output quantities of single sideband power line carrier terminals. IEC 663:1980, Planning of (single sideband) power line carrier systems. 2) Published by CIGRE Working Group 04 of St
30、udy Committee 35. BS7602:1992 2 BSI 08-1999 2.5 Radio Recommendations and reports of the CCIR, XVIth Plenary Assembly, 1986, Volume IX Part 1: Fixed service using radio-relay systems. Recommendations and reports of the CCIR, XVIth Plenary Assembly, 1986, Volume VIII Parts1-3: Mobile services. 2.6 CC
31、ITT FDM: CCITT Blue Book (1988) Volume III Fascicle111-2: International analogue carrier systems. Transmission media characteristics. TDM: CCITT Blue Book (1988) Volume III Fascicle111-3: Digital Networks. Transmission system and multiplexing equipment. CCITT Blue Book (1988) Volume VIII Fascicle VI
32、II-7: Data communication networks. Message handling systems. Recommendations X.400 X.420. 2.7 Electro-magnetic compatibility Immunity tests (IEC 801 and IEC 1000 series). 3 General An electric power system consists of a number of power stations (thermal and hydro) located in different parts of a cou
33、ntry supplying electric power via a transmission and distribution network to feed loads which are spread across the territory and are remote from the power stations. The transmission network connects the power stations to substations where switching and transformation to lower voltages takes place a
34、nd from where loads, domestic and industrial are supplied via a distribution network. An electric power system is frequently referred to as an electrical public utility. In order to administer and operate the utility, in addition to the power stations, transmission and distribution substations, a nu
35、mber of other units can be identified (see Figure 1). These are: a headquarters to run the utility; one or more control centres to determine which power stations should operate and how the transmission and distribution network shall be used; one or more maintenance centres; one or more computing cen
36、tres for support of the control centre(s) and for support of headquarters. These units obviously cannot work in isolation and hence require telecommunication services. The following subclauses in clause 3 identify the functions to be executed and the consequent telecommunication services needed to s
37、atisfy the functions. 3.1 Functions 3.1.1 Administrative telephony (see Figure 2) At the most basic level headquarters will need to communicate with all locations within the utility by voice, that is telephony, and may also wish to use telex and facsimile services and, increasingly, electronic mail
38、services. The locations will also wish to communicate with one another. Locations will also need telephone connections to outside of the utility, that is via the public switched telephone network (PSTN) and this may again include telex and facsimile services. 3.1.2 Operational telephony (see Figure
39、3) The control centre(s) requires rapid and simple telephone access to the power stations, substations and the maintenance centre(s). Telephone access is also required to neighbouring power utilities for the purpose of scheduling the interchange of electricalpower. 3.1.3 Telecontrol (SCADA) (see Fig
40、ure 4) In order that the control centre can carry out its function it needs to be provided with all the information about the power system, namely status positions (i.e. monitored information such as circuit-breakers, isolators, alarms), measurands, integrated totals, etc., from the power stations (
41、thermal and hydro) and substations which are of course remote from the control centre. It is also necessary to control electrical and hydraulic plant. If load frequency control (LFC also known as Automatic Generation Control) is used then remote control of the turbine-alternators at the power statio
42、ns will also be required. In the case of hydro-electric power stations hydraulic data, such as rainfall and water level, also needs to be returned to the control centre. At the control centre(s) this information is used to drive a man-machine interface consisting of mimic diagrams and visual display
43、 units (VDUs). The system used to handle all these aspects is known as a telecontrol system or SCADA (Supervisory Control and Data Acquisition) system.BS7602:1992 BSI 08-1999 3 3.1.4 Load management (see Figure 5) An electrical power utility may wish to improve its system load factor throughout the
44、day by offering incentives to customers to utilise electric power at particular periods of the day. This function is known as load management and is achieved by the remote switching in or out of loads. Load management may be under the control of the control centre or it may be an automatic feature s
45、uch as when it is used for the control of street lighting. 3.1.5 Teleprotection (see Figure 6) Where the occurrence of an incident on the power system requires protective action at another location teleprotection is used. 3.1.6 Mobile radio (see Figure 7) In support of the operation of the power sys
46、tem, under the control of the control centre(s), there will be a maintenance organisation with one or more locations in the territory covered by the utility. These maintenance centres will have mobile crews who can be reached either in their vehicles or directly on a “walkie-talkie” basis. For this,
47、 mobile radio is used typically in the VHF (70165 MHz) andUHF (400470 MHz) bands. 3.1.7 Computing traffic (see Figure 8) In modern utilities it is usual to have at least one main-frame computer with, in addition, smaller mini-computers located elsewhere connected to the main-frame. The main-frame ma
48、y be used by the control centre for off-line planning studies. It may also be used for administrative services such as wages and billing. 3.2 Telecommunication services 3.2.1 Administrative telephony To satisfy the administrative needs of the utility(3.1.1) a private network is usually provided, whi
49、ch makes use of suitable communication media (see5.1) together with private automatic exchanges and, if the network is large enough, with transit exchanges. For connection to the public network, public exchange lines are usually provided to all locations requiring the service. 3.2.2 Operational telephony To satisfy the operational telephony needs (3.1.2) a special purpose telephone system is usually provided with key calling of a limited repertoire of extensions and, where such a system is shared with t
