BSI PD IEC/TS 62257-9-1:2016
$198.66
Recommendations for renewable energy and hybrid systems for rural electrification – Integrated systems. Micropower systems
| Published By | Publication Date | Number of Pages |
| BSI | 2016 | 64 |
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:
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isolated dwellings;
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village houses;
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community services (public lighting, pumping, health centres, places of worship or cultural activities, administrative buildings, etc.);
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economic activities (workshops, micro-industry, etc.).
The DRESs fall into the following three categories:
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process electrification systems (for example, for pumping);
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individual electrification systems (IES) for single users;
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collective electrification systems (CES) for multiple users.
Process or individual electrification systems exclusively consist of two subsystems:
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an electric energy generation subsystem;
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the user’s electrical installation.
Collective electrification systems, however, consist of three subsystems:
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an electric energy generation subsystem;
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a distribution subsystem, also called microgrid;
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user’s electrical installations including interface equipment between the installations and the microgrid.
This technical specification applies to a micropower plant which is the electric energy generation subsystem associated with a decentralized rural electrification system.
It provides general requirements for the design, erection and operation of micropower plants and general requirements to ensure the safety of persons and property.
The micropower plants covered by this specification are low-voltage a.c., three-phase or single-phase, with rated capacity less than, or equal to, 100 kVA. The rated capacity is at the electrical output of the micropower plant, that is, the upstream terminals of the main switch between the micropower plant and the microgrid. They do not include voltage transformation.
The voltage levels covered under this specification are:
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the 240 V 1-Ø/415 V 3-Ø, the 230 V 1-Ø/400 V 3-Ø, the 220 V 1-Ø/380 V 3-Ø, and the 120 V 1-Ø/208 V 3-Ø systems at 60 Hz or 50 Hz; or obeyed by local code.
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the ELV (less than 120 V) d.c. systems.
The requirements cover “centralized” micropower plants for application in:
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process electrification;
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individual electrification systems and collective electrification systems.
It does not apply to distributed generation on microgrids.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | CONTENTS |
| 7 | FOREWORD |
| 9 | INTRODUCTION |
| 10 | 1 Scope |
| 11 | 2 Normative references 3 Terms and definitions |
| 13 | 4 General 4.1 Boundary of a micropower plant |
| 14 | 4.2 Composition of a micropower plant 4.3 General functional layout of a micropower plant Figures Figure 1 – Micropower system limits |
| 15 | 5 Design 5.1 Design criteria Figure 2 – Example of functional layout for a micropower plant supplying a.c. energy |
| 16 | 5.2 Power generation mix 5.2.1 General |
| 17 | 5.2.2 Internal combustion generator sets 5.3 Electrical design 5.3.1 System voltage selection |
| 18 | 5.3.2 Interconnection of generators 5.4 Mechanical and civil works 5.4.1 Civil works 5.4.2 Technical room Figure 3 – Interconnection configuration with d.c. bus and a.c. bus Figure 4 – Interconnection configuration with a.c. bus only |
| 19 | 5.4.3 Battery room 5.4.4 Specific requirements 6 Safety issues 6.1 Electrical issues 6.1.1 General 6.1.2 Specific requirements |
| 20 | Figure 5 – Example of protection against effects of lightning and over-voltage for generators with two live conductors output (d.c. or a.c.) TNS P+N |
| 21 | Figure 6 – Example of protection against effects of lightning over-voltage for three phase generators with four live a.c. conductors (TNS P+N scheme) – Generator side Figure 7 – Example of a simplified lightning protection includinga crow’s foot earth termination |
| 22 | Figure 8 – Protection of a photovoltaic array Tables Table 1 – Minimum dimensions for lightning protection wires |
| 23 | 6.2 Mechanical issues 6.3 Thermal and fire issues 6.4 Noise issues Figure 9 – Wiring arrangement for equipotential link |
| 24 | 6.5 Access security 7 Erection of equipment 7.1 Siting 7.1.1 Photovoltaic array 7.1.2 Wind turbine 7.1.3 Micro-hydro turbine |
| 25 | 7.1.4 Generator set 7.1.5 Technical room 7.1.6 Battery bank (battery enclosure) |
| 26 | 7.2 Equipment installation 7.2.1 Mechanical 7.2.2 Electrical |
| 27 | Table 2 – Cross-section of 230 V a.c. power cables |
| 28 | Table 3 – Fuse ratings for protection from short-circuiting in 230 V/400 V a.c. circuits Table 4 – Fuse ratings for protection from short-circuiting in 120 V/208 V a.c. circuits Table 5 – Circuit-breaker ratings for protection from short-circuiting |
| 29 | 8 Acceptance process 8.1 General 8.2 Phase 1: Preparation 8.3 Phase 2: Documentation 8.4 Phase 3: Commissioning 8.4.1 Step 1: Evaluation of the conformity of the installed system with the accepted design 8.4.2 Step 2: Evaluation of qualification of the installation 8.4.3 Step 3: Preliminary tests |
| 30 | 8.4.4 Step 4: Performance testing |
| 31 | 8.5 Phase 4: Agreement 8.6 Commissioning records 9 Operation, maintenance and replacement 10 Marking and documentation 10.1 Marking 10.1.1 Information for emergency services 10.1.2 Information for maintenance |
| 32 | 10.1.3 Information for batteries 10.1.4 Signs 10.2 Documentation |
| 34 | Annexes Annex A (informative) Selectivity of protection |
| 35 | Figure A.1 – Example of the selectivity of protection |
| 36 | Annex B (informative) Risk assessment of lightning stroke B.1 General B.2 Risk assessment simplified methodology B.3 Risk assessment multi-criteria methodology Table B.1 – Stake index values |
| 37 | Table B.2 – Construction index values Table B.3 – Height index values Table B.4 – Situation index values Table B.5 – Lightning prevalence index values |
| 38 | Table B.6 – Assessment of risk and need for protection |
| 39 | Annex C (normative) Voltage domains Table C.1 – Voltage domains |
| 40 | Annex D (informative)Battery room D.1 Administrative formalities D.2 Battery siting D.3 Characteristics of the battery storage site: specific battery room or locker |
| 41 | D.4 Electrical equipment |
| 42 | D.5 Safety instructions D.6 Battery enclosure examples (informative) |
| 43 | Figure D.1 – Two examples of a battery installed in a dedicated equipment room showing clearances from equipment |
| 44 | Figure D.2 – Example of a battery enclosure within a room where the battery enclosure is vented to outside the building |
| 45 | Figure D.3 – Example of a battery enclosure with equipment enclosure immediately adjacent |
| 46 | Figure D.4 – Example of a battery enclosure with the intake and outlet vents on the same wall |
| 47 | Annex E (informative) Energy fraction calculations |
| 48 | Annex F (informative) Noise control F.1 General F.2 Assessment of noise annoyance F.3 Principles of noise attenuation |
| 49 | F.4 Noise reduction methods for specific items of equipment F.4.1 Generator sets F.4.2 Wind turbines F.4.3 Inverters and other electronic equipment |
| 50 | Annex G (informative) Commissioning record sheet (examples) |
| 61 | Bibliography |
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