This part of IEC 62257 specifies the general requirements for the selection, sizing, erection and operation of generator sets in decentralized rural electrification systems.<\/p>\n
It applies to all low voltage combustion engine electricity generator sets energized by renewable energy such as biomass gasifier or biogas, or fossil fuel such as gasoline or diesel fuel, and designed for supplying electrical power to isolated sites used in systems as described in IEC TS 62257-2.<\/p>\n
This document is not an exhaustive resource for the design, installation, operation or maintenance of generator sets, but is more focused on recommendations to provide strategies on selection and criteria which may affect the use of such generation systems in a rural electrification project.<\/p>\n
Four cases of micropower plant will be considered as illustrated by Figure 1 to power a collective electrification system (microgrid) or an individual electrification system.<\/p>\n
the micropower plant is composed of one generator set;<\/p>\n<\/li>\n
the micropower plant is composed of multiple generator sets, which may have a single energy source or multiple energy sources;<\/p>\n<\/li>\n
the micropower plant which is a hybrid energy system between one generator set and a Power Conditioning Sub-system (PCS) which is powered by other energy source including renewable energy source or energy storage;<\/p>\n<\/li>\n
the micropower plant which is a hybrid energy system between multiple generator sets and multiple Power Conditioning Sub-systems (PCSs) which are powered by other energy sources including renewable energy sources or energy storage systems.<\/p>\n<\/li>\n<\/ul>\n
Figure 1 General functional configuration of micropower plant in micropower system<\/b><\/p>\n
The aim of this document is to provide users with the appropriate guide to select generator sets for using in micropower plant with different configurations and levels of reliability and safety of the equipment during its estimated service lifespan.<\/p>\n
It describes the minimum requirement of generator set functionality and safety requirements and does not claim to be an exhaustive instruction manual or design specification.<\/p>\n
Compliance with this document does not exempt any person, organization or corporation from the responsibility to comply with all other relevant requirements including what is indicated in maker user manuals and local electrical regulations.<\/p>\n
This document gives recommendations for the following types of generator sets:<\/p>\n
single phase;<\/p>\n<\/li>\n
three phase;<\/p>\n<\/li>\n
LV range up to 500 V \u2013 50\/60 Hz (see IEC TS 62257-9-2).<\/p>\n<\/li>\n<\/ol>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 1 Scope <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | Figures Figure 1 \u2013 General functional configuration of micropower plantin micropower system <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 4 Introduction to generator sets 4.1 Generator set system 4.2 Generator set application in rural electrification systems 4.2.1 General 4.2.2 Single generator set (micropower plant Type A) 4.2.3 Multiple generator sets (micropower plant Type B) Figure 2 \u2013 Micropower plant Type A: single generator set <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 4.2.4 Single generator set with a power conditioning sub-system (micropower plant Type C) 4.2.5 Multiple generator sets with multiple power conditioning sub-systems (micropower plant Type D) Figure 3 \u2013 Micropower plant Type B: multiple generator setsin micropower plant Figure 4 \u2013 Micropower plant Type C: single generator set witha power conditioning sub-system in micropower plant <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 4.3 Resource assessment 5 Selection and erection 5.1 General Figure 5 \u2013 Micropower plant Type D: Multiple generator sets withmultiple power conditioning sub-systems micropower plant <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 5.2 Selection requirements 5.2.1 Power quality 5.2.2 Generator set sizing <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 5.2.3 Generator set type <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 5.2.4 Derating factors 5.2.5 Starting system Tables Table 1 \u2013 Examples of derating factors for generator sets <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 5.2.6 Control systems 5.2.7 Noise issues 5.2.8 Environmental issues Table 2 \u2013 Generator set permitted noise levels <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 5.3 Erection 5.3.1 Shipping 5.3.2 Design of the erection site <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 5.3.3 Installation requirements <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 6 Safety 6.1 General 6.2 Electrical issues 6.2.1 General requirements 6.2.2 Connection system to the application <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 6.2.3 Power cables 6.2.4 Neutral system 6.2.5 Earthing Table 3 \u2013 Cross-section of power cables <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 6.2.6 Overcurrent protection 6.2.7 Residual Current Protection Device (RCD) 6.2.8 Isolating devices 6.3 Mechanical issues 6.3.1 Vibration 6.3.2 Protection from mechanical damage <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 6.3.3 Protection from moving parts 6.4 Thermal issues 6.5 Fire risk 7 Acceptance 7.1 General 7.2 Conformity of the generator set to the identification file 7.3 Conformity of the generator set system to the generator set specification (GS) 7.4 Acceptance process 7.4.1 Preparation of the generator set for commissioning <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 7.4.2 Commissioning inspection of the generator set system 7.4.3 Commissioning tests of the generator set system <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 7.4.4 Test file 8 Operation and maintenance 8.1 Access to the generator set 8.2 Operation process <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 8.3 Monitoring 8.4 Maintenance schedule 9 Replacement <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 10 Marking 10.1 General 10.2 Generator set 10.3 Engine <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 10.4 Alternator 10.5 Shutdown apparatus 11 Documentation 11.1 General 11.2 Installation <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | 11.3 Operation 11.4 Inspection and maintenance <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Annex A (informative)Generator set classification criteria A.1 General A.2 Functioning mode A.3 Services provided A.4 Application classes Table A.1 \u2013 Classification of generator set services <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | A.5 Lifespan A.6 Generator set components design A.6.1 Engine Table A.2 \u2013 Common lifespan values <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | A.6.2 Alternator A.6.3 Starting systems A.7 Configuration types <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | A.8 Installation modes <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | Annex B (informative)Identification file B.1 General B.2 Electrical construction characteristics B.3 Mechanical construction characteristics <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | Annex C (informative)Maintenance schedule Table C.1 \u2013 Example of maintenance schedule <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | Annex D (informative)Example of commissioning records sheet <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Recommendations for renewable energy and hybrid systems for rural electrification – Generator set. Selection of generator sets for rural electrification systems<\/b><\/p>\n |