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1、BRITISH STANDARD BS EN 50160:2007 Voltage characteristics of electricity supplied by public distribution networks The European Standard EN 50160:2007 has the status of a British Standard ICS 29.020; 29.240.01 ? BS EN 50160:2007 This British Standard was published under the authority of the Standards
2、 Policy and Strategy Committee on 31 October 2007 BSI 2007 ISBN 978 0 580 55841 2 National foreword This British Standard is the UK implementation of EN 50160:2007. It supersedes BS EN 50160:2000 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee GEL/8,
3、Systems aspects for electrical energy supply. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with
4、 a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD EN 50160 NORME EUROPENNE EUROPISCHE NORM September 2007 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electr
5、otechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50160:2007 E ICS 29.020 Supersedes EN 50160:1999 English v
6、ersion Voltage characteristics of electricity supplied by public distribution networks Caractristiques de la tension fournie par les rseaux publics de distribution Merkmale der Spannung in ffentlichen Elektrizittsversorgungsnetzen This European Standard was approved by CENELEC on 2007-06-01. CENELEC
7、 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 national standards may be obtained on appl
8、ication 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 language and notified to the Central Secretar
9、iat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Ne
10、therlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 50160:2007 2 Foreword This European Standard was prepared by the Working Group 1, Physical characteristics of electrical energy, of the Technical Committee CENELEC TC 8X, System as
11、pects for electrical energy supply. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50160 on 2007-06-01. This European Standard supersedes EN 50160:1999 + corrigendum September 2004. The following dates were fixed: latest date by which the EN has to be implem
12、ented at national level by publication of an identical national standard or by endorsement (dop) 2008-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-06-01 _ 3 EN 50160:2007 Contents 1 Scope and object 4 1.1 Scope 4 1.2 Object 4 2 Normative r
13、eferences. 5 3 Definitions. 5 4 Low-voltage supply characteristics 9 4.1 Power frequency. 9 4.2 Magnitude of the supply voltage. 9 4.3 Supply voltage variations 9 4.3.1 Requirements 9 4.3.2 Test method. 10 4.4 Rapid voltage changes . 10 4.4.1 Single rapid voltage change 10 4.4.2 Flicker severity. 10
14、 4.5 Supply voltage dips. 10 4.6 Short interruptions of the supply voltage 10 4.7 Long interruptions of the supply voltage. 11 4.8 Temporary power frequency overvoltages between live conductors and earth . 11 4.9 Transient overvoltages between live conductors and earth . 11 4.10 Supply voltage unbal
15、ance. 11 4.11 Harmonic voltage 12 4.12 Interharmonic voltage . 12 4.13 Mains signalling voltage on the supply voltage 12 5 Medium-voltage supply characteristics 13 5.1 Power frequency. 13 5.2 Magnitude of the supply voltage. 13 5.3 Supply voltage variations 14 5.4 Rapid voltage changes . 14 5.4.1 Ma
16、gnitude of rapid voltage changes 14 5.4.2 Flicker severity. 14 5.5 Supply voltage dips. 14 5.6 Short interruptions of the supply voltage 14 5.7 Long interruptions of the supply voltage. 14 5.8 Temporary power frequency overvoltages between live conductors and earth . 15 5.9 Transient overvoltage bet
17、ween live conductors and earth . 15 5.10 Supply voltage unbalance. 15 5.11 Harmonic voltage 15 5.12 Interharmonic voltage . 16 5.13 Mains signalling voltage on the supply voltage 16 Annex A (informative) Special nature of electricity . 18 Bibliography. 20 Figure 1 - Voltage levels of signal frequenc
18、ies in percent of Un used in public LV distribution networks 13 Figure 2 - Voltage levels of signal frequencies in percent of Uc used in public MV distribution networks . 17 Table 1 - Values of individual harmonic voltages at the supply terminals for orders up to 25 given in percent of the fundament
19、al voltage U1 12 Table 2 - Values of individual harmonic voltages at the supply terminals for orders up to 25 given in percent of the fundamental voltage U1 16 EN 50160:2007 4 1 Scope and object 1.1 Scope This European Standard defines, describes and specifies the main characteristics of the voltage
20、 at a network users supply terminals in public low voltage and medium voltage electricity distribution networks under normal operating conditions. This standard describes the limits or values within which the voltage characteristics can be expected to remain over the whole of the public distribution
21、 network and does not describe the average situation usually experienced by an individual network user. NOTE 1 For the definitions of low and medium voltage see 3.7 and 3.8. The European Standard does not apply under abnormal operating conditions including the following: a temporary supply arrangeme
22、nt to keep the network users supplied during condition arising as a result of a fault, maintenance and construction work or to minimize the extent and duration of a loss of supply; in case of non-compliance of a network users installation or equipment with the relevant standards or with the technica
23、l requirements for connection, established either by the public authorities or the distribution network operator (DNO) including the limits for the emission of conducted disturbances; NOTE 2 A network users installation may include load as well as generation. in exceptional situations, in particular
24、, exceptional weather conditions and other natural disasters, third party interference, acts by public authorities, industrial actions (subject to legal requirements), force majeure, power shortages resulting from external events. The voltage characteristics given in this standard are not intended t
25、o be used as electromagnetic compatibility (EMC) levels or user emission limits for conducted disturbances in public distribution networks. The voltage characteristics given in this standard are not intended to be used to specify requirements in equipment product standards and in installation standa
26、rds. NOTE 3 The performance of equipment might be impaired if it is subjected to supply conditions which are not specified in the equipment product standard. This standard may be superseded in total or in part by the terms of a contract between the individual network user and the DNO. 1.2 Object The
27、 object of this European Standard is to define and describe the characteristics of the supply voltage concerning frequency, magnitude, wave form, symmetry of the line voltages. 5 EN 50160:2007 These characteristics are subject to variations during the normal operation of a supply system due to chang
28、es of load, disturbances generated by certain equipment and the occurrence of faults which are mainly caused by external events. The characteristics vary in a manner which is random in time, with reference to any specific supply terminal, and random in location, with reference to any given instant o
29、f time. Because of these variations, the levels of the characteristics can be expected to be exceeded on a small number of occasions. Some of the phenomena affecting the voltage are particularly unpredictable, which make it very difficult to give useful definite values for the corresponding characte
30、ristics. The values given in this standard for such phenomena, e.g. voltage dips and voltage interruptions, shall be interpreted accordingly. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited
31、 applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-161 International Electrotechnical Vocabulary - Chapter 161: Electromagnetic compatibility 3 Definitions For the purposes of this document, the following terms and definition
32、s apply. 3.1 network user party being supplied by or supplying to an electricity distribution network 3.2 distribution network operator (DNO) party responsible for operating, ensuring the maintenance of and, if necessary, developing the distribution network in a given area and, for ensuring the long
33、 term ability of the network to meet reasonable demands for the distribution of electricity 3.3 supply terminal point in a distribution network designated as such and contractually fixed, at which electrical energy is exchanged between contractual partners NOTE This point can differ from, for exampl
34、e, the electricity metering point or the point of common coupling. 3.4 supply voltage r.m.s. value of the voltage at a given time at the supply terminal, measured over a given interval 3.5 nominal voltage (Un) voltage by which a distribution network is designated or identified and to which certain o
35、perating characteristics are referred EN 50160:2007 6 3.6 declared supply voltage (Uc) the declared supply voltage Uc is normally the nominal voltage Un of the distribution network. If by agreement between the DNO and the network user a voltage different from the nominal voltage is applied to the te
36、rminal, then this voltage is the declared supply voltage Uc 3.7 low voltage (LV) for the purpose of this European Standard, voltage whose upper limit of nominal r.m.s. value is 1 kV 3.8 medium voltage (MV) for the purpose of this European Standard, voltage whose nominal r.m.s. value lies above 1 kV
37、and below 35 kV 3.9 normal operating condition for a distribution network, condition of meeting load and generation demands, system switching and clearing faults by automatic system protection in the absence of exceptional conditions due to external influences or major events 3.10 conducted disturba
38、nce electromagnetic phenomenon propagated along the line conductors of a distribution network. In some cases an electromagnetic phenomenon is propagated across transformer windings and hence between networks of different voltage levels. These disturbances may degrade the performance of a device, equ
39、ipment or system or they may cause damage 3.11 frequency of the supply voltage repetition rate of the fundamental wave of the supply voltage measured over a given interval of time 3.12 voltage variation increase or decrease of voltage normally due to load variations 3.13 rapid voltage change single
40、rapid variation of the r.m.s. value of a voltage between two consecutive levels which are sustained for definite but unspecified durations (for more information see EN 61000-3-3) 3.14 voltage fluctuation series of voltage changes or a cyclic variation of the voltage envelope IEV 161-08-05 3.15 flick
41、er impression of unsteadiness of visual sensation induced by a light stimulus whose luminance or spectral distribution fluctuates with time IEV 161-08-13 NOTE Voltage fluctuation causes changes of the luminance of lamps which can create the visual phenomenon called flicker. Above a certain threshold
42、 flicker becomes annoying. The annoyance grows very rapidly with the amplitude of the fluctuation. At certain repetition rates even very small amplitudes can be annoying. 7 EN 50160:2007 3.16 flicker severity intensity of flicker annoyance defined by the UIE-IEC flicker measuring method and evaluate
43、d by the following quantities: short term severity (Pst) measured over a period of ten minutes; long term severity (Plt) calculated from a sequence of 12 Pst values over a two hour interval, according to the following expression: 3 12 1 12 3 = = i Psti ltP 3.17 supply voltage dip sudden reduction of
44、 the supply voltage to a value between 90 % and 1 % of the declared voltage Uc followed by a voltage recovery after a short period of time. Conventionally the duration of a voltage dip is between 10 ms and 1 min. The depth of a voltage dip is defined as the difference between the minimum r.m.s. volt
45、age during the voltage dip and the declared voltage. Voltage changes which do not reduce the supply voltage to less than 90 % of the declared voltage Uc are not considered to be dips 3.18 supply interruption condition in which the voltage at the supply terminals is lower than 1 % of the declared vol
46、tage, Uc. A supply interruption can be classified as prearranged, when network users are informed in advance, to allow the execution of scheduled works on the distribution network, or accidental, caused by permanent or transient faults, mostly related to external events, equipment failures or interf
47、erence. An accidental interruption is classified as: a long interruption (longer than three minutes); a short interruption (up to three minutes). NOTE 1 The effect of a prearranged interruption can be minimized by the network users by taking appropriate measures. NOTE 2 Accidental supply interruptio
48、ns are unpredictable, largely random events. 3.19 temporary power frequency overvoltage overvoltage, at a given location, of relatively long duration (see CLC/TR 50422, Clause 3 for more information) NOTE Temporary overvoltages usually originate from switching operations or faults (e.g. sudden load
49、reduction, single phase faults, non-linearities). 3.20 transient overvoltage short duration oscillatory or non-oscillatory overvoltage usually highly damped and with a duration of a few milliseconds or less IEV 604-03-13 modified NOTE Transient overvoltages are usually caused by lightning, switching or operation of fuses. The rise time of a transient overvoltage can vary from less tha