DD-IEC-TS-62257-9-2-2006.pdf
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1、DRAFT FOR DEVELOPMENT DD IEC/TS 62257-9-2:2006 Recommendations for small renewable energy and hybrid systems for rural electrification Part 9-2: Microgrids ICS 27.160; 27.180 ? Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 03:51:10 GMT+00:00 2006, Uncontrolled
2、 Copy, (c) BSI DD IEC/TS 62257-9-2:2006 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 49642 2 National foreword This Draft for Development was published by BSI. It is the UK implementation of IEC/TS
3、 62257-9-2:2006. 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 practical application can be
4、 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 than 3 years after its pu
5、blication 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 period, the responsible B
6、SI 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 Chiswick High Road, Lond
7、on 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 necessary provisions of a
8、 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 03:51:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI TECHNICAL SPECIFICATION IEC TS 62257-9-2 F
9、irst edition 2006-10 Recommendations for small renewable energy and hybrid systems for rural electrification Part 9-2: Microgrids Reference number IEC/TS 62257-9-2:2006(E) DD IEC/TS 62257-9-2:2006 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 03:51:10 GMT+00:0
10、0 2006, Uncontrolled Copy, (c) BSI CONTENTS INTRODUCTION.4 1 Scope.5 2 Normative reference.5 3 Terms and definitions .5 4 General 7 4.1 Limits of a microgrid7 4.2 Voltage drops7 4.3 Composition of a microgrid7 5 Protection against electric shocks.19 6 Protection against overcurrents 19 7 Selection a
11、nd erection of equipment.19 7.1 Equipment installation .19 7.2 Operational conditions and external influences19 7.3 Characteristics of lines 11 7.4 Cables.12 7.5 Poles.12 7.6 Cable anchorage.15 7.7 Connections and accessories 15 7.8 Where poles are used for other purposes 17 7.9 Isolation and switch
12、ing 17 7.10 Earthing arrangement, protective conductors and protective bonding conductors 18 8 Verification and acceptance20 8.1 General.20 8.2 Supervision of works .20 8.3 Verification before commissioning (on site acceptance).20 8.4 Operation tests21 Annex A (informative) Characteristics of cables
13、 22 Annex B (informative) Maximum circuit length.24 Figure 1 Microgrid limits.7 Figure 2 Microgrid consisting of a single-phase feeder.18 Figure 3 Three phase system output, single phase distribution or three phase service provided where needed.18 Figure 4 Three phase system output, single phase dis
14、tribution 19 Figure 5 Diagram showing installation of twinned wooden poles forming an angle .14 Figure 6 Examples of different pole arrangements .14 Figure 7 Example of an overhead line14 Figure 8 Connection mode diagram17 Figure 9 Microgrid earthing scheme .19 2 DD IEC/TS 62257-9-2:2006 Licensed Co
15、py: London South Bank University, London South Bank University, Tue Dec 12 03:51:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Table 1 Maximum values of voltage drops7 Table 2 Fuse ratings for protection from short-circuiting in 230 V a.c. microgrids (overhead lines)18 Table 3 Fuse ratings for prote
16、ction from short-circuiting in 120 V a.c. microgrids (overhead lines)18 Table 4 Circuit breaker ratings for protection from short-circuiting in microgrids (overhead lines)18 Table 5 Characteristics of earthing components.20 Table A.1 Example of characteristics of grid conductors for overhead lines (
17、insulated twisted conductors without carrier neutral)22 3 DD IEC/TS 62257-9-2:2006 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 03:51:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTRODUCTION The IEC 62257 series intends to provide to different players invol
18、ved 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
19、. These 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 i
20、nclusive 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 c
21、onsistent 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
22、 that is: small renewable energy and hybrid off-grid systems. Decentralized Rural Electrification Systems (DRES) are designed to supply electric power for sites which are not connected to a large interconnected system, or a national grid, in order to meet basic needs. The majority of these sites are
23、: isolated dwellings, village houses, community services (public lighting, pumping, health centres, places of worship or cultural activities, administrative buildings, etc.), economic activities (workshops, microindustry, etc.). The DRE systems fall into three categories: process electrification sys
24、tems (for example for pumping), individual electrification systems (IES) for single users, collective electrification systems (CES) for multiple users. Process or individual electrification systems exclusively consist of two subsystems: an electric energy generation subsystem, the users electrical i
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