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1、DRAFT FOR DEVELOPMENT DD IEC/TS 62257-9-3:2006 Recommendations for small renewable energy and hybrid systems for rural electrification Part 9-3: Integrated system User interface ICS 27.160; 27.180 ? Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 03:51:13 GMT+00
2、:00 2006, Uncontrolled Copy, (c) BSI DD IEC/TS 62257-9-3:2006 This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 30 November 2006 BSI 2006 ISBN 0 580 49643 0 National foreword This Draft for Development was published by BSI. It is the UK im
3、plementation of IEC/TS 62257-9-3:2006. This publication is not to be regarded as a British Standard. It is being issued in the Draft for Development series of publications and is of a provisional nature. It should be applied on this provisional basis, so that information and experience of its practi
4、cal application can be obtained. Comments arising from the use of this Draft for Development are requested so that UK experience can be reported to the international organization responsible for its conversion to an international standard. A review of this publication will be initiated not later tha
5、n 3 years after its publication by the international organization so that a decision can be taken on its status. Notification of the start of the review period will be made in an announcement in the appropriate issue of Update Standards. According to the replies received by the end of the review per
6、iod, the responsible BSI Committee will decide whether to support the conversion into an international Standard, to extend the life of the Technical Specification or to withdraw it. Comments should be sent to the Secretary of the responsible BSI Technical Committee at British Standards House, 389 Ch
7、iswick High Road, London W4 4AL. The UK participation in its preparation was entrusted to Technical Committee GEL/82, Solar photovoltaic energy systems. A list of organizations represented on GEL/82 can be obtained on request to its secretary. This publication does not purport to include all the nec
8、essary provisions of a contract. Users are responsible for its correct application. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 03:51:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI TECHNICAL SPECIFICAT
9、ION IEC TS 62257-9-3 First edition 2006-10 Recommendations for small renewable energy and hybrid systems for rural electrification Part 9-3: Integrated system User interface Reference number IEC/TS 62257-9-3:2006(E) DD IEC/TS 62257-9-3:2006 Licensed Copy: London South Bank University, London South B
10、ank University, Tue Dec 12 03:51:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CONTENTS INTRODUCTION.3 1 Scope.4 2 Normative reference.4 3 Terms and definitions .5 4 Electrical characteristics.7 4.1 Equipment.7 4.2 System voltages7 5 Functional description 7 6 Design and erection .18 6.1 System eart
11、hing 18 6.2 Implementation of interface functions 18 6.3 Insulation requirements .19 6.4 Selection of electrical equipment.19 6.5 Housing.19 6.6 Protection against fraudulent use 10 7 Information to be given and marking.10 8 Verification and acceptance10 8.1 General.10 8.2 Verification by inspection
12、.10 8.3 Commissioning tests .11 Figure 1 General configuration of an electrification system 4 Figure 2 Interface for user installations supplied from a a.c. or a d.c. source .7 Figure 3 Interface for user installations supplied locally from a.c. or d.c. sources (not from a microgrid) 18 Table 1 Func
13、tions ensured by various types of user interfaces.7 DD IEC/TS 62257-9-3:2006 2 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 03:51:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTRODUCTION The IEC 62257 series intends to provide to different players involved
14、in rural electrification projects (such as project implementers, project contractors, project supervisors, installers, etc.) documents for the setting up of renewable energy and hybrid systems with a.c. nominal voltage below 500 V, d.c. nominal voltage below 750 V and nominal power below 100 kVA. Th
15、ese documents are recommendations: to choose the right system for the right place, to design the system, to operate and maintain the system. These documents are focused only on rural electrification concentrating on but not specific to developing countries. They should not be considered as all inclu
16、sive to rural electrification. The documents try to promote the use of renewable energies in rural electrification; they do not deal with clean mechanisms developments at this time (CO2 emission, carbon credit, etc.). Further developments in this field could be introduced in future steps. This consi
17、stent set of documents is best considered as a whole with different parts corresponding to items for safety, sustainability of systems and at the lowest life cycle cost as possible. One of the main objectives is to provide the minimum sufficient requirements, relevant to the field of application tha
18、t is: small renewable energy and hybrid off-grid systems. DD IEC/TS 62257-9-3:2006 3 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 03:51:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI RECOMMENDATIONS FOR SMALL RENEWABLE ENERGY AND HYBRID SYSTEMS FOR RURAL ELECT
19、RIFICATION Part 9-3: Integrated system User interface 1 Scope The purpose of this part of IEC 62257 is to specify the general requirements for the design and the implementation of the interface equipment within the users installation which connects to a microgrid or the generating part of a standalo
20、ne system. This interface is a part of the users installation as shown in Figure 1. Microgrid Production sub-system Micropowerplant User interface Distribution sub-system User sub-system Installation Generator Other equipment IEC 1909/06 Figure 1 General configuration of an electrification system Th
21、is part of IEC 62257-9 applies to a simplified users interfaces (distribution board) in electrical installations with maximum power of 500 VA in Decentralized Rural Electrification Systems (DRES). NOTE For installations above 500 VA in decentralized electrification systems, IEC 62257-5 applies. This
22、 part of IEC 62257-9 applies to an interface equipment within the users installation and which connects the users installation to: 230 V a.c. or 120 V a.c. microgrid, the generating part a.c. or d.c. - of a stand-alone installation. This equipment provides protection, isolation, and distribution fun
23、ctions. 2 Normative reference The following referenced documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60364 (all parts),
24、Electrical installations of buildings DD IEC/TS 62257-9-3:2006 4 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 03:51:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IEC 60439-3:1990, Low-voltage switchgear and control gear assemblies Part 3: Particular requireme
25、nts for low-voltage switchgear and control gear assemblies intended to be installed in places where unskilled persons have access for their use Distribution boards Amendment 1:1993 Amendment 2:2001 IEC 62257 (all parts), Recommendations for small renewable energy and hybrid systems for rural electri
26、fication 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 carrier (messenger) wire or rope, the primary function of which is to support the cable in aerial installations, which may be separate from or integral with the cable it supports 3.2 bl
27、ock part of a line between two consecutive stoppage poles 3.3 earth conductive mass of the earth, whose electric potential at any point is conventionally taken as equal to zero 3.4 equipotential bonding provision of electric connections between conductive parts, intended to achieve equipotentiality
28、NOTE The role of the equipotential bonding is to decrease the difference in potential that can exists between two exposed-conductive parts of an installation. 3.5 microgrid subsystem of a DRES intended for power distribution of which the capacity does not exceed 100 kVA NOTE The prefix micro is inte
29、nded to express the low level of transmitting capacity. 3.6 micropowerplant subsystem of a DRES for power generation up to 100 kVA NOTE The prefix micro is intended to express the low power level generated (from a few kVA to a few tens of kVA). 3.7 protective conductor (identification: PE) conductor
30、 provided for purposes of safety, for example protection against electric shock IEV 195-02-09 DD IEC/TS 62257-9-3:2006 5 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 03:51:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3.8 PEN conductor conductor combining the
31、 functions of a protective earthing conductor and a neutral conductor IEV 195-02-12 3.9 power line overhead or underground line installed to convey electrical energy for any purpose other than communication 3.10 section of an overhead line part of a line between two tension poles NOTE A section gene
32、rally includes several spans. 3.11 selectivity (or protection coordination) the ability of a protection to identify the faulty section and/or phase(s) of a power system IEV 448-11-06 3.12 service connection line conductors between the suppliers mains and the customers installation. In the case of an
33、 overhead service connection, this means the conductor between a supply-line pole and the customers installation 3.13 span part of a line between two consecutive poles 3.14 stay steel wire, rope or rod, working under tension, that connects a point of a support to a separate anchor 3.15 supply point
34、contractual limit between the grid and the users installation NOTE In rural electrification systems, it is generally located on the input terminals (microgrid side) of the users interface. 3.16 surge arrester device designed to protect the electrical apparatus from high transient overvoltages and to
35、 limit the duration and frequently, the amplitude of the follow-on current 3.17 Surge Protective Device SPD device that is intended to protect the electrical apparatus from transient overvoltages and divert surge current; it contains at least one non linear component DD IEC/TS 62257-9-3:2006 6 Licen
36、sed Copy: London South Bank University, London South Bank University, Tue Dec 12 03:51:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 Electrical characteristics 4.1 Equipment The user interface is a type-tested assembly which satisfies the requirements of IEC 60439-3. The user interface can be eith
37、er a manufactured product or assembled on site according to the manufacturers instructions. 4.2 System voltages The user interface can be used for users installations supplied from: a microgrid or a stand-alone generator supplying 230 V a.c. or 120 V a.c., a d.c. generator (for example, a photovolta
38、ic installation) supplying 12 V or 24 V d.c., an a.c. generator supplying 230 V a.c. or 120 V a.c. 5 Functional description The functions to be ensured by the user interface in accordance with the IEC 62257-9-4 are listed in Table 1. Table 1 Functions ensured by various types of user interfaces Func
39、tion Description A Connection to electricity sources (microgrid or generator) B Isolation from the electricity sources C Protection against electric shocks D, D1 Protection against overloads and short-circuits E Contract management if relevant F Earthing terminal G Distribution of circuits Figure 2
40、and Figure 3 are examples of installation and functions ensured by the user interface. (Technical functions represented are not contractually binding). PE (for a.c.) Functions: A B C D1 D B E G PE (for a.c.) User loads AC or DC source Installation IEC 1944/06 NOTE Function D1 can be ensured by the u
41、nit ensuring functions A, B and C, or by a special unit, or by the unit ensuring function E. Figure 2 Interface for user installations supplied from an a.c. or a d.c. source DD IEC/TS 62257-9-3:2006 7 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 03:51:13 GMT+
42、00:00 2006, Uncontrolled Copy, (c) BSI Functions: A B C D1 D B E Installation PE G PE User d.c. loads A B C D1 D F B User a.c. loads Individual micropowerplant, including possibly inverter if needed IEC 1945/06 Figure 3 Interface for user installations supplied locally from a.c. or d.c. sources (not
43、 from a microgrid) 6 Design and erection 6.1 System earthing In accordance with IEC 62257-5, IEC 62257-9-2 and IEC 62257-9-4, only TN-S user installations are considered in this part of IEC 62257-9. 6.2 Implementation of interface functions 6.2.1 Function A: connection to electricity sources Functio
44、n A is a connection point between the microgrid (or micropowerplant) and the users installation. It comprises terminals able to accept: Installation connected to a microgrid (Figure 2) The terminal shall be able to connect cables up to 6 mm. Installation connected to a micropowerplant (Figure 3) For
45、 a.c.: the terminal shall be able to connect cables up to 6 mm, For d.c.: the terminal shall be able to connect cables up to 10 mm. 6.2.2 Function B: isolation This function is to electrically isolate the users installation from the microgrid or from the micropowerplant. NOTE Function B can be incor
46、porated in the devices dedicated to functions C or D. 6.2.3 Function C: protection against direct and indirect contact A Residual Current protective Device with a rated operating residual current less than or equal to 30 mA shall be used. NOTE It can be combined with the device dedicated to Function
47、 D (see IEC 61009 series). DD IEC/TS 62257-9-3:2006 8 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 03:51:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6.2.4 Function D: protection against overcurrents Protection of property against short-circuits and overload
48、s in the users installation shall be performed by one or several magnetic-thermal circuit breakers or by one or several fuse(s)as specified in IEC 62257-9-4. 6.2.5 Function E: contract management The aim of the function is to ensure that the contractual arrangement with the operator is fulfilled. Fo
49、r example, electricity meter, power limiter, power and energy limiter etc. . 6.2.6 Function F: earthing This function is to provide a connection point for earthing conductor. The connection terminals should allow for connection of cables according to IEC 62257-9-4. The same terminal may be used for connection of the earthing conductor, the PE and the neutral conduc