1、BRITISH STANDARD Distribution automation using distribution line carrier systems Part 3. Mains signalling requirements Section 21. MV phase-to-phase isolated capacitive coupling device The European Standard EN 61334-321 : 1996 has the status of a British Standard ICs 29.240.20 NO COPYING WITHOUT BSI
2、 PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 1997 1996 61334-3-21 : IEC 1334-3-21 : BS EN 61334-3-21 : 1997 AmdNo. Committees responsible for this British Standard Date Text affected The preparation of this British Standard was entrusted to Technical Committee PEU57, Power systms control a
3、nd associated communications, upon which the following bodies were represented BEAMA Metering Association (BMA) Budding Automation and Mains Signalling Association (BASMA) Electricity Association Federation of the Electronics Industry GAMBICA Institution of Electrical Engineers ?kcuismission and Dis
4、tsibution Association (BEAMA Ltd.) This British Standard, having been prepared under the direction of the Electrokchnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 March 1997 O BSI 1997 The following BSI references relate to the work on this s
5、tandard committee reference PEU67 Draft for comment 91/34173 DC ISBN O 680 26916 7 BS EN 613343-21 : 1997 Contents page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 61334-3-21 3 O BSI 1997 i STD-BSI BS EN bL334-3-21-ENGL 1777 m Lb24bb7 0577445 777 m BS EN 6133
6、4-3-21 : 1997 National foreword This British Standard has been prepared by Technical Committee PEU57 and is the English language version of EN 61334-3-21 : 1996 Distribution automation using distribution line carrier qstenw Part 3: Mains siiprotected locations BS EN 60721-3-4 : 1995 Stutionarg use a
7、t non-weaihmpvtected locations BS EN 6072155 : 1993 Ground vehicle installations BS EN 607213-6 : 1993 Ship enmnment BS EN 60721-3-7 : 1996 Portaale and rumstationarg use BS EN 60721-3-9 : 1993 Microclites ilzide VduCts Compliance with a British Standard does not of itself confer immunity from legal
8、 obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 18, an inside back cover and a back cover. ii O BSI 1997 STD-BSI BS EN bL334-3-21-ENGL 1777 Lb24bb9 059744b bO1 W EUROPEAN STANDARD NORME EUR0PEE”E EXJFtOPm NORM
9、 EN 61334r3-21 August 1996 Descriptors: Electric power, distribution automation, line carrier systems, mains signalling requirements, capacitive phase to phase coupling device English version Distribution automation wing distribution line carrier systems Part 3: Mains signaDing requirements Section
10、2.1: MV phasetephase isolated capacitive couplmg device (IEC 1334-3-21 : 1996) Automatisation de la distribution laide de Verteilungsautomatisierung mit Hilfe von Systemes de communication couranis porteurs Trgemystemen auf Verteilungsleitungen Partie 3 Prescriptions conceniant la trmhion Teil 3: Ne
11、tzbedingte Anforderungen an die des signaux sur le secteur Signdbertragung Section 21: Dispositif de couplage phasephase Hauptabschnitt 21: Kapazitiv getrennte capacitjfisol MT AuBenleiter-Adenleiter-Ankopplungs- (CE1 1334-3-21 : 1996) einrichtungen fur MittelSpannung (EC 13343-21 : 1996) This Europ
12、ean Standard was approved by CENELEC on 1996-07-02. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Uptodate lists and bibliographical references co
13、ncerning such national 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 in
14、to its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Asxia, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spa
15、in, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Centrai Secretariat: rue de Stassart 36, B-1060 Brussels O 1996 Copyright reserved to CENELEC m
16、embers Ref. No. EN 61334-3-21 : 1996 E Page 2 EN 613343-21 : 1996 Foreword The text of document 57/248/FDIS, future edition 1 of iEC 1334-3-21, prepared by IEC TC 57, Power system control and associated communications, was submitted to the IEGCENELEC parallel vote and was approved by CENELC as EN 61
17、334-3-21 on 1996-07-02. The following dates were fixed: - latestdatebywhichthe EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 199744-01 latest date by which the national standards conflicting with the EN have to be withdrawn - (dow
18、) 1997-04-01 Annexes designated normative are part of the body of the standard in this standard, annex ZA is normative. Annex ZA has been added by CENELEC. Contents . Introduction 1 Scope and object 2 3 3.1 3.2 3.3 4 4.1 4.2 4.3 4.4 5 5.1 5.2 Normative references Definitions MV phase-to-phase capaci
19、tive coupling method Coupling device Terms concerning coupling devices Services conditions Standard conditions Ambient temperature Power frequency Operating voltages General requirements Safety and protection requirements Insulation requirements 5.3 Carrier-frequency requirements 6.4 Rating plate 5.
20、5 Tests Figures 1 MV phase-to-phase isolated coupling 2 device Main components of a MV phaseto-phase isolated coupling device 3 Power-frequency test 4 Common-mode impulse voltage test 5 6 Measurement of composite loss 7 Measurement of return loss 8 Measurement of the nominal coupling-side impedence
21、9 Measurement of the nominal equipment-side impedence 10 Measurement of the 3 dI3 bandwidth Annex ZA (normative) Normative references to intemational publications with their corresponding European publications Differential mode impuise voltage test 4 4 5 5 5 5 6 6 6 6 6 6 7 7 7 8 8 11 12 13 13 14 15
22、 15 16 16 16 17 O BSJ 1997 Page 3 EN 61334-3-21 : 1996 INTRODUCTION The already standardized capacitive coupling devices for power-line carrier systems (.e. phase-to-earth and phase-to-phase) could be applied on DLC systems. In this case recommendations of IEC 481 are fully applicable. However, the
23、above-mentioned coupling devices are not fully suitable for an extensive application of DLC on MV networks for the following reasons: - from a technical point of view, earthing the primary winding of the coupling transformer may cause unbalancing in the zero sequencing current, with negative effects
24、 on the directional overcurrent relay protections; - from an economical point of view, the coupling device should have a price as low as possible. These considerations lead to the standardization of another coupling device such as the MV phase-to-phase isolated capacitive coupling device, where “iso
25、lated“ means: no connection of the primary section of the coupling device to the earth. Figure 1 shows a solution. Other solutions may become available. As other coupling devices are standardized, new sections to IEC 1334-3 will be added. STD.BSI BS EN bL334-3-21-ENGL 1777 Lb24bb7 0579449 312 Page 4
26、 EN 61334-3-21 : 1996 DISTRIBUTION AUTOMATION USING DISTRIBUTION LINE CARRIER SYSTEMS - Part 3: Mains signalling requirements - Section 21 : MV phase-to-phase isolated capacitive coupling device 1 Scope and object This section of IEC 1334-3 applies only to MV phase-to-phase isolated capacitive coupl
27、ing devices for MV (medium voltage) distribution line carrier (DLC) systems. The coupling device ensures: a) the efficient transmission/reception of carrier-f requency signals between the DLC- transceiver and the power line; b) the safety of personnel and the protection of the low-voltage parts of t
28、he installation against the effects of the power-frequency voltage and transient overvoltages. The object of this section of IEC 1334-3 is to establish definitions, requirements, methods of testing and rated values for phase-to-phase isolated capacitive coupling devices to be used in MV-DLC systems.
29、 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this section of IEC 1334-3. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agre
30、ements based on this section of IEC 1334-3 are encouraged to investigate the possibility of applying the most recent edition of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid International Standard. , IEC 38: 1983, IEC standard voltages IEC 71 -
31、1 : 1993, Insulation co-ordination - Part 1: Definitions, principles and rules IEC 481 : 1974, Coupling devices for power line carrier systems I EC 721 : Classification of environmental conditions Page 5 EN 61334-3-21 : 1996 3 Definitions For the purposes of this section of IEC 1334-3, the following
32、 definitions apply. 3.1 MV phase-to-phase capacitive coupling method: The coupling device is connected between the conductor of one phase and the conductor of another phase of the power line and no connection is provided from the primaty section of the coupling device to the earth. 3.2 coupling devi
33、ce: An arrangement of elements which contributes to ensure, together with the associated coupling capacitor, the transmission/reception, under prescribed conditions, of carrier-frequency signals between the conductors of the power line and the DLC transceivers. NOTE -These elements, alone or togethe
34、r, contribute to all or part of the functions described below: -tuning, at he desired carrier-frequency value. This function may be performed by a tuning device; - impedance matching between the power line and the DLC equipment. This function may be performed by a transformer or autotransformer; - g
35、alvanic Isolation between primary and secondary section terminals of the coupling device. This function may be performed by the above-mentioned transformer, if present: -limitation of voltage surges coming from the power line at the terminals of the coupling device. This function may be performed by
36、 surge arresten suitably arranged in the coupling device. 3.2.1 intended to be connected directly to the local station earth. earth terminal: A terminal of the secondary section of the coupling device which is 3.2.2 primary terminals: The terminals of the coupling device which are intended to be con
37、nected to the conductors of the power line. 3.2.3 secondary terminals: The terminals of the coupling device which are intended to be connected to the carrier-frequency connection. 3.3 Terms concerning coupling devices 3.3.1 designed to match on the power network side and to which the requirements re
38、fer. nominal coupling-side impedance (I,): The impedance which the coupling device is 3.3.2 is designed to match on the equipment side and to which the requirements refer. nominal equipment-side impedance (22): The impedance which the coupling device 3.3.3 composite loss: The composite loss brought
39、about by the quadripole made up of the coupling device terminated by the nominal coupling-side and equipment-side impedance. 3.3.4 return loss: The return loss of the quadripole made up of the coupling device terminated by the nominal line-side and equipment-side impedance. 3.3.5 available bandwidth
40、: The frequency band within which the composite loss does not exceed the specified values. STD BSI BS EN b133q-3-23-ENGL 1997 m Lb2qbbS 0599453 T70 m Page 6 EN 61334-3-21 : 1996 3.3.6 carrier-frequency working range: The range of carrier frequencies within which the available bandwidth of a coupling
41、 device can be set. 3.3.7 nominal peak-envelope power: The peak-envelope power for which the coupling device has been designed compatible with the requirements of the signal distortion. 4 Service conditions 4.1 Standard conditions In most cases, the standard conditions for phase-to-phase isolated MV
42、 capacitive coupling devices shall be those for indoor service. However, it is also possible to meet conditions for outdoor service. In this case the coupling device shall be capable of their functions whether exposed to sunshine, rain, fog, hail, frost, snow, ice, etc. 4.2 Ambient temperature Unles
43、s otherwise agreed between manufacturer and purchaser, the ambient temperature shall be: - between -25 OC and +55 OC for outdoor service; - between -10 OC and +55 OC for indoor service. For special applications refer to IEC 721. 4.3 Power frequency The power system shall have a rated frequency betwe
44、en zero (d.c.) and 60 Hz inclusive. 4.4 Operating voltages Taking into account the standard and exceptional values established in IEC 38, the rated operating voltages shall be between 6 kV and 35 kV. 5 General requirements The main components of a MV phase-to-phase isolated capacitive coupling devic
45、e (see figure 2) are: a) on the primary side (subjected to the nominal operating voltage of the MV network): -the coupling capacitor C; -the tuning coil L; -the primary winding of the coupling transformer T,; -the secondary winding and the shield of the coupling transformer T,; -the matching impedan
46、ce network. b) on the secondary side (side to be connected to the carrier-frequency device): The taps available on the matching impedance network are used for matching the coupling device to the different impedances of overhead lines, cables or MV-busbars. . STD-BSI BS EN b1334-3-21-ENGL 1777 LbZLib
47、b9 0597Li52 707 Page 7 EN 61334-3-21 : 1996 A surge arrester Sc may be used, on the primary side or on the secondary side. 5.1 Safety and protection requirements 5.1.1 General The coupling device shall meet the following requirements in order to prevent the occurrence of dangerous potentials on the
48、carrier-frequency connection due to the service voltage or transient overvoltages which may occur on the power line (overvoltages due to the operation of switchgear and/or atmospheric overvoltages). The coupling device shall be designed and built to ensure that an overvoltage on the power line shall
49、 not damage the coupling device. 5.1.2 Drain coil or coupling transformer winding The drain coil or coupling transformer winding shall withstand any of the overvoltages which may occur on the power line. 5.1.3 Main arrester A surge arrester shall be connected as shown in figure 2 in order to protect the coupling device. The type of surge arrester should be selected by the manufacturer in order to ensure the protection requirements and a suitable lifetime. 5.2 Insulation requirements In order to satisfy the insulation requirements, the coupling device shall be
