《BS-IEC-1000-3-7-1996.pdf》由会员分享,可在线阅读,更多相关《BS-IEC-1000-3-7-1996.pdf(38页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS IEC 1000-3-7:1996 Implementation of IEC 1000-3-7:1996 Electromagnetic compatibility (EMC) Part 3: Limits Section 7. Assessment of emission limits for fluctuating loads in MV and HV power systems Basic EMC publication ICS 33.100 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov
2、26 12:00:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 1000-3-7:1996 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 February 1997 BSI 10-1998 The followi
3、ng BSI references relate to the work on this standard: Committee reference GEL/210/8 Draft for comment 95/209993 DC ISBN 0 580 27118 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee GEL/210, Electromagnetic compatibility
4、 (EMC), upon which the following bodies were represented: Association of Consulting Scientists Association of Control Manufacturers (TACMA (BEAMA Ltd.) Association of Manufacturers of Domestic Electrical Applicances (AMDEA) Association of Manufacturers of Power Generating Systems BEAMA Ltd. and BEAM
5、A Metering Association Building Automation and Mains Signalling Association (BAMSA (BEAMA Ltd.) British Industrial Truck Association British Lighting Association for the Preparation of Standards (BritLAPS) British Telecommunications plc Department of Health Department of Trade and Industry Directora
6、te of Airspace Policy Electrical Installation Equipment Manufacturers Association (BEAMA Ltd.) Electricity Association EMC Test Laboratories Association ERA Technology Ltd. Federation of the Electronics Industry (FEI) GAMBICA (BEAMA Ltd.) Health and Safety Executive (HSE) Induction and Dielectric He
7、ating Manufacturers Association (IDHMA) International Association of Broadcasting Manufacturers Institution of Electrical Engineers (IEE) Lighting Industry Federation (LIF) Ministry of Defence Motor Industry Research Association (MIRA) National Physical Laboratory (NPL) Professional Lighting and Sou
8、nd Association (PLASA) Radiocommunications Agency Rotating Electrical Machines Association (REMA (BEAMA Ltd.) Society of British Gas Industries (SBGI) Society of Motor Manufacturers and Traders (SMMT) Transmission and Distribution Association (BEAMA Ltd.) The following bodies were also represented i
9、n the drafting of the standard, through subcommitee GEL/210/8 British Radio and Electronic Equipment Manufacturers Association (BREMA) Electrical Contractors Association (ECA) Heating, Ventilating and Air Conditioning Association (HVCA) Power Supply Manufacturers Association (PSMA (BEAMA Ltd.) Amend
10、ments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:00:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 1000-3-7:1996 BSI 10-1998i Contents Page Committees responsibleInside front cover National forewordii Forewordiv Text of CEI IEC 1000-
11、3-71 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:00:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 1000-3-7:1996 ii BSI 10-1998 National foreword This British Standard reproduces verbatim IEC 1000-3-7:1996 and implements it as the UK national s
12、tandard. This British Standard is published under the direction of the Electrotechnical Sector Board whose Technical Committee GEL/210 has the responsibility to: aid enquirers to understand the text; present to the responsible international committee any enquiries on interpretation, or proposals for
13、 change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. NOTEInternational and European Standards, as well as overseas standards, are available from Customer Services, BSI, 389 Chiswick High Road, London W4 4AL. A British Standar
14、d 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 confer immunity from legal obligations. Cross-references Publication referred toCorresponding Brit
15、ish Standard IEC 50 (161):1990BS 4727 Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour terms Part 1 Terms common to power, telecommunications and electronics Group 09:1991 Electromagnetic compatibility IEC 868:1986BS EN 60868:1993 Flickermeter. Functional and
16、design specifications BS EN 61000 Electromagnetic compatibility (EMC) IEC 1000-3-3:1994Part 3 Limits Section 3:1995 Limitation of voltage fluctuations and flicker in low-voltage supply systems for equipment with rated current # 16 A BS IEC 1000 Electromagnetic compatibility (EMC) IEC 1000-3-5:1994Pa
17、rt 3 Limits Section 5:1993 Limitation of voltage fluctuations and flicker in low-voltage power supply systems for equipment with rated current greater than 16 A Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the CEI IEC title page, pages ii to iv, page
18、s 1 to 28 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. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:00:59 GMT+00:00 2006, Uncontrolled Copy, (c) BS
19、I Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:00:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 1000-3-7:1996 ii BSI 10-1998 Contents Page Forewordiv Introduction1 1Scope1 2Reference documents1 3Basic concepts1 4General principles4 5General guidelines for the assessment of emissi
20、on levels5 6Summation effects6 7Emission limits for fluctuating loads in MV systems7 7.1Stage 1: simplified evaluation of disturbance emission7 7.2Stage 2: emission limits proportional to the agreed power of the consumer7 7.3Stage 3: acceptance of higher emission levels on an exceptional and precari
21、ous basis9 8Emission limits for fluctuating loads in HV systems10 8.1Stage 1: simplified evaluation of disturbance emission10 8.2Stage 2: emission limits proportional to the agreed power of the consumer10 8.3Stage 3: acceptance of higher emission levels on an exceptional and precarious basis11 9Emis
22、sion limits for rapid voltage changes11 Annex A Simplified prediction methods for flicker severity13 Annex B Addition of Pst from different busbars15 Annex C Examples of some typical case studies16 Annex D List of principal letter symbols, subscripts and symbols25 Annex E Bibliography28 Figure 1 Ill
23、ustration of basic voltage quality concepts with time/location statistics covering the whole system3 Figure 2 Illustration of basic voltage quality concepts with time statistics relevant to one site within the whole system3 Figure 3 Diagram of evaluation procedure5 Figure 4 Pst = 1 curve for regular
24、 rectangular voltage changes6 Figure 5 Steady-state and dynamic voltage changes12 Figure 6 Steady-state and dynamic voltage changes: Uc: Steady-state voltage change Udyn: Dynamic voltage change12 Figure A.1 Shape factors for periodic voltage fluctuations14 Figure A.2 Shape factors for ramps and doub
25、le-steps14 Figure A.3 Shape factors for rectangular and triangular pulses14 Figure B.1 Example of two arc furnaces fed from electrically distant busbars15 Figure C.1 Example of effect from a rolling mill16 Figure C.2 Example profile of winder reactive power levels20 Figure C.3 Example of effect of m
26、ultiple spot welder load21 Figure C.4 Normal network configuration22 Figure C.5 Busbars coupled23 Figure C.6 “n-1” network configuration23 Figure C.7 Operation without SVC24 Table 1 Compatibility levels for Pst and Plt in LV and MV power systems2 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 2
27、6 12:00:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 1000-3-7:1996 BSI 10-1998iii Page Table 2 Indicative values of planning levels for Pst and Plt in MV, HV and EHV power systems2 Table 3 Pst = 1 for regular rectangular voltage changes6 Table 4 Stage 1 limits for the relative power variatio
28、ns in function of the number of variations per minute7 Table 5 Example of acceptable global contribution of the MV loads to the MV flicker levels if the transfer coefficient from the HV system is supposed to be 0,88 Table 6 Basic emission levels9 Table 7 Basic emission levels11 Table 8 Emission limi
29、ts for voltage changes in function of the number of changes per hour12 Table C.1 Flicker measurements for example C.2, flicker effects, normal running19 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:00:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 1000-3-7:1996 iv BSI 10-1998 Fore
30、word 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international cooperation on all questions concerning standardization in the
31、electrical and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. Internationa
32、l, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Standardization Organization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal dec
33、isions or agreements of the IEC on technical matters express, as nearly as possible an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested National Committees. 3) The documents produced have the form of recommendations for
34、 international use and are published in the form of standards, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards transparently to the max
35、imum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible fo
36、r any equipment declared to be in conformity with one of its standards. The main task of IEC technical committees is to prepare International Standards. In exceptional circumstances, a technical committee may propose the publication of a technical report of one of the following types: type 1, when t
37、he required support cannot be obtained for the publication of an International Standard, despite repeated efforts; type 2, when the subject is still under technical development or where for any other reason there is the future but not immediate possibility of an agreement on an International Standar
38、d; type 3, when a technical committee has collected data of a different kind from that which is normally published as an International Standard, for example “state of the art”. Technical reports of types 1 and 2 are subject to review within three years of publication to decide whether they can be tr
39、ansformed into International Standards. Technical reports of type 3 do not necessarily have to be reviewed until the data they provide are considered to be no longer valid or useful. IEC 1000-3-7, which is a technical report of type 3, has been prepared by sub-committee 77A: Low frequency phenomena,
40、 of IEC technical committee 77: Electromagnetic compatibility. The text of this technical report is based on the following documents: Full information on the voting for the approval of this technical report can be found in the report on voting indicated in the above table. This report is a technical
41、 raport of type 3 and is of a purely informative nature. It is not to be regarded as an International Standard. Committee draftReport on voting 77A/136/CDV77A/154/RCV Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:00:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 1000-3-7:1996 BSI 1
42、0-19981 Introduction This technical report is part of the IEC 1000 series, according to the following structure: Part 1: General General considerations (introduction, fundamental principles) Definitions, terminology Part 2: Environment Description of the environment Classification of the environment
43、 Compatibility levels Part 3: Limits Emission limits Immunity limits (in so far as they do not fall under the responsibility of product committees) Part 4: Testing and measurement techniques Measurement techniques Testing techniques Part 5: Installation and mitigation guidelines Installation guideli
44、nes Mitigation methods and devices Part 6: Miscellaneous Each part is further subdivided into sections which are to be published either as international standards or as technical reports. This section is a technical report. 1 Scope This technical report outlines principles which are intended to be u
45、sed as the basis for determining the requirements for connecting large fluctuating loads (producing flicker) to public power systems. The primary objective is to provide guidance for engineering practices which will ensure adequate service quality for all connected consumers. Since the guidelines ou
46、tlined in this report are necessarily based on certain simplifying assumptions, there is no guarantee that this approach will always provide the optimum solution for all flicker problems. The recommended approach should be used with flexibility and judgment as far as engineering is concerned, when a
47、pplying the given assessment procedures in full or in part. The final decision regarding the connection of fluctuating installations will always rest with the utility. Problems related to voltage fluctuations fall into two basic categories: flicker effect from light sources; risk of the voltage magn
48、itude being outside accepted tolerances. This report primarily focuses on controlling or limiting flicker, but a clause is included to address voltage magnitude changes and their effects. NOTE 1This report uses the following terms for system voltage: In the context of this report, the function of th
49、e network is more important than its rated voltage. For example, a HV system used for distribution may be given a “planning level” (see Clause 3) which is situated between those of MV and HV systems. NOTE 2The “load” is to be understood as the complete consumers load. 2 Reference documents IEC 50(161):1990, International Electrotechnical Vocabulary (IEV) Chapter 161: Electromagnetic compatibility. IEC 868:1986, Flickermeter Functional and design specifications. IEC 1000-3-3:1994, Electroma
链接地址:https://www.31doc.com/p-3747226.html